Sunday, April 9, 2017

Ailerons in France, used for turning, 1908

Ailerons have definitely arrived in France. Their working is now understood.

Musée de l’Air et de l’Espace. L’Aérophile 15 February 1909.
p. 51 [from H. Lefort, ‘L’Aéroplane Wright et les aéroplanes français’]
Wright ensures lateral stability by wing warping [‘gauchissement’]. He increases the ‘angle d’attaque’ of one wing while reducing it on the other. This makes the ‘réactions’ that the wing receives vary inversely [to the twisting]. So an inclination takes place, and a change in the horizontal direction of the aircraft. In this way, wings may be levelled, if required. ‘To combat the damaging turning movement, Wright combines the action of twisting [the wing] with the action of a vertical rudder’ [thus achieving a coordinated turn].
p. 52
‘It is moreover useful to notice that the twisting of the wings is a means of achieving horizontal direction rather than being a means of [maintaining] stability.’ [A sentence that sums up the change in French aircraft from late 1908 to early 1909 that made them the best aircraft in the world.]
The effect of twisting the wing is the formation of a maximum coupling of a lever arm, producing a force of great intensity – a greater force than that produced by the rudder in the tail. [Light has finally fallen on French aviation thinking. It is the banked wing that produces the turn, not the rudder.]
’Besides that, the [lateral] inclination of the aircraft produces a considerable horizontal component, annulling the action of centrifugal force, and favouring the turn.’  Thus a rudder in the tail seems no more than a corrector of the effects of wing twisting, assuring lateral stability. The Wrights’s rudder can be combined with the deformation of the wing to facilitate a turn; or it can be used alone to produce curves of large radius.
p. 53
The Wrights’ aircraft is now indisputably superior to French aircraft. But French aviators have earned great merit, and the order of achievement could change.
[It did. Finally the French have understood how to turn an airplane. The banked wing does the work, not the rudder. An airplane is not a boat. The realization that the rudder can be applied in coordination with banking to produce a clean turn – one in which the airplane is not moving sideways through the air -- is impressive.
By the time this article appeared, many French flyers had come to the conclusions given here. Following the example of Wilbur Wright in the late summer and fall of 1908, they had equipped their aircraft with either wing warping or ailerons. These, they increasingly came to realize, were not primarily a means of keeping wings level, but a means of intentionally producing bank – and turns. They now had aircraft that were potentially better than the Wrights’.]
[They had long been moving towards this realization. The addition of ailerons to an aircraft goes back several years in France – but always with the primary intention of keeping the wings level, rather than of tilting the wing to one side or the other. At least, so it seems. But in the summer of 1908, before Wilbur Wright flew in France, Blériot had fitted ailerons to his aircraft that were somehow involved in turning – either producing the bank that made the wing give some horizontal force for a turn, or levelling the wings after a turn produced by the rudder. And Ferber may have been using ailerons to produce turn in summer 1908 also.
In Le Matin, 26 July 1908, p. 6, is a report on Ferber’s current machine.

Ferber, who, in the newspaper’s view, ‘astonishes by his deep knowledge of piloting planes’, yesterday made several flights at Issy. His aircraft [he says] is a simple ‘cellule’ whose tips can be twisted [‘gauchés’] by a lever – i.e. they can take up a more or less accentuated angle of incidence. There is an elevator in the nose and a fixed empennage in the tail. ‘Steering is operated by means of the ailerons fitted on the right and left of the wing {‘cellule’}, but I think I am going to go back to the rudder’ (for steering, presumably). So ailerons have here been fitted and are used for steering; but Ferber may prefer a rudder for that purpose.]

Alberto Santos-Dumont



Alberto Santos-Dumont

Santos-Dumont’s No. 15, probably March 1907. This was his first conventional machine – i.e. front engine and propeller, tail in rear. It never flew, but was a valuable predecessor to his later Demoiselle. It had ailerons (not visible here) in the outer section of each wing. The wings were narrow, and given a large dihedral angle. Santos-Dumont is in the pilot’s seat.

Notes from Le Matin, except where otherwise shown.

[for an excellent account of Santos-Dumont’s work in 1906, and his building and flying of the 14bis then, see Pierre Lissarrague, ‘Histoire des Techniques. Une étude systématique sur le XIV bis de Santos- Dumont’, in Pégase, No. 31, September 1983]

1907

15 February 1907.  Revue de l’Aviation 2:3 (15 February 1907).
11-13  ‘Causerie faite le 31 janvier 1907 par M. Armengaud jeune, à l’Hôtel des Sociétés Savantes devant le groupe parisien de l’École Polytechnique.’  [This talk is about Santos-Dumont’s history in France]
Archdeacon persuaded Santos-Dumont to switch from lighter-than-air to heavier-than-air flight [in 1905?].  [A description is given of Santos-Dumont’s 14 bis  -- mildly technical, no mathematics.]
The wing is described as following the ‘cellular kite type invented by the American Hargrave’. [Hargrave was Australian.] All structure is of bamboo or light wood stiffened with piano wire (as in Santos-Dumont’s dirigible).  Propulsion is by a 2 bladed aluminium propeller of 2 metres diameter, and pitch of 1 metre. It runs at 1,200 rpm, driven by an Antoinette gasoline engine of 45-50 hp , designed by Levavasseur. The power is high, the weight low (roughly 1.5 kilograms per hp). The thrust obtained is 150 kilograms.
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2 March, La Vie au Grand Air, No. 441
p.144  François Peyrey,  ‘The new aeroplane of Santos Dumont’ [‘Le nouvel aéroplane de Santos Dumont’][This is Santos-Dumont’s No. 15]
Santos-Dumont now has military permission to fly at St. Cyr, because Bagatelle is too crowded, and dangerous to the public. It has a ‘vast plain’ previously reserved to the training of officer cadets. Santos-Dumont has a hangar there now, to which he has taken his new airplane for assembly. This is the No. 15, resembling the 14 bis. It has dihedral, and a wingspan of 11 metres (the wing consisting of six ‘Hargrave cells’). It is not silk covered but covered in Okoumé wood (nut wood from the Isles [an African hardwood, coming mostly from Gabon]), and varnished. The frame is of hollow steel tubing, reinforced by piano wire. The lifting area on the 14 bis was sixty square metres. Now only fourteen square metres are presented to the sustaining reaction of the air. The aircraft has a single wheel of 90 mm [diameter?]. It has an elevator [‘gouverneur de profondeur’] in the tail, which is a biplane [‘cellule’], like the wings. The tail span is 2.6 metres, chord 0.6 metres, and height 1.1 metres. It rests on a bamboo framework 4 metres long. Two small rudders [‘gouverneurs de direction’, but actually ailerons] are in the outer cells of the wing. The propeller is of aluminium and steel, 2.05  metres in diameter, and with pitch of 1.7 metres. It is directly driven by the same engine as was in the 14 bis; though this will soon be replaced by a 100 hp engine. The pilot sits on a saddle from a three wheel car [‘selle de tricar’], fixed to the frame that carries the rudder, and below and slightly behind the engine. The centre of thrust is a little above the centre of drag. The weight is 280 kilos.
The smaller lifting surface gives less air resistance, though greater speed (and power) is needed to lift the machine. The estimated speed of takeoff is 70-75 kph.
It is regrettable that the 100 hp engine is not yet available. Santos-Dumont will test the machine with the 50 hp Antoinette motor.
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16 March, La Vie au Grand Air, No. 443
p.175  [the cover page of this number]: A large frontal picture of Santos-Dumont, seated in the new [No. 15] aircraft. He is sitting between the wings (5-6 feet apart vertically). The engine is above the upper wing, in the V of the dihedral with a tractor propeller. Two long, narrow radiators are behind and on each side of the engine. The single wheel is at the leading edge of the lower wing. The tire is fat. [The thrust line is very high.]

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22 March. Charles Dollfus, ‘Alberto Santos-Dumont, né le 20 juillet 1873’ [From L’Aéronautique. September 1932?].
p. 131 Dollfus reports that this aircraft was destroyed on the ground on this day, owing to deforming of the wings [which were too lightly built]. But other sources refer to its being tested after 22 March. [See next two notes.]
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28 March 1907
p.4  ‘Aéronautique’
Santos-Dumont is at St. Cyr, Blériot and Vuia are at Bagatelle. All made trials on 27 March. Blériot had to stop on his first launch, because of breakage of the forks of the two pneumatic wheels of his aircraft. Repair is easy. Vuia’s machine did well, making two trials with short flights (‘bonds’) of 5-6 metres, at a height of about a metre. His carbonic acid motor is weak. It gives too little speed for longer flights.
Santos-Dumont tried for the first time the lateral rudders [presumably the ailerons -- ’gouvernails latéraux] of his Aéroplane No. 2. The first launch went without incident. On the second, wood buckled (from air pressure) enough to make the aircraft roll severely to right and left. Finally the right wing hit the ground and the left one grazed the ground; but the central part of the aircraft was not damaged. Santos-Dumont was not hurt. He said he had expected all this. The wood was under great strain (‘beaucoup travaillé’). He has ordered new wings. He will continue with his trials with his No.1 meantime. [No. 1 here presumably means the 14bis of autumn 1906; No. 2 is the No. 15.]
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April 1907, in L’Aérophile, 15:4, April 1907, pp. 92-5
This aircraft, the No. 15, was built on what became the conventional pattern, with a tractor propeller, rudder and elevator surfaces in the tail (a 2.6 by 0.6 metre  four-surface cellular structure), and a biplane, dihedral, wing with the pilot seated between the lower planes. The wing was wood-covered on both top and bottom surfaces. The airplane’s most striking feature was probably the extreme narrowness of the wing: the chord was 0.6 metres, and the span 11 metres. Why Santos-Dumont chose this high aspect ratio is not yet clear.
The No. 15 has ailerons – outboard, between, and in front of, the wings. They are controlled by foot pedals, and could be moved together or separately. They are said to be intended for use in making turns and directional changes, ‘completely replacing the vertical rudder’. (The aircraft had a vertical tail, moved from side to side by a control wheel.)
[It seems that the use of ailerons for correcting unintended bank – the purpose for which they had previously been fitted to French aircraft – is not the aim here. These ailerons are intended to produce turns. They never did so, because the aircraft never flew. But Santos-Dumont’s understanding of what ailerons could do to turn an aircraft is far ahead of most thinking in France at the time.]
Taxiing trials of this aircraft took place on 22 and 27 March 1907 at the champs de manoeuvres of St.-Cyr. The aircraft almost flew, with the wing taking most of the weight. But finally, in a practice on-ground turn into the wind, the right wing touched the ground and was badly damaged. Stiffening of the wings was needed, with steel or aluminium angle brackets. Heat and damp led to twisting of the wings [which look, in photographs, very lightly built].
Santos-Dumont did taxiing trials both up- and down-wind. The article notes that into wind taxiing is ‘more advantageous’.
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April 1907. Le Matin has various references in this month to Santos-Dumont’s flying in balloons, though not of his own design or making  [e.g. 28 April 1907, p. 5].
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1 April 1907
p. 5  Georges Besançon (‘sympathique sécretaire’ of the AéroClub) has told Le Matin that Santos-Dumont will today attempt at St. Cyr the Grand Prix de l’Aviation with the 14bis, weather permitting. The prize is 50,000 francs.
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3 April 1907
p. 4  Santos-Dumont yesterday called to St. Cyr the aviation commission of the AéroClub de France to witness any attempt he might make with the 14bis on the Grand Prix de l’Aviation (i.e. the Deutsch-Archdeacon prize for one kilometer with a 180 degree turn). But no attempt was made because of strong wind in the morning. In the afternoon a good number of sportsmen came (Deutsch de la Meurthe, Archdeacon, Besançon [these presumably were not sportsmen], and Ferber, Delagrange, Gabriel Voisin, Kapferer, Tatin, Levec, Chenu, J. Faure, Buisson, etc. Around 4 p.m. rain was briefly added to the wind. Santos-Dumont decided to postpone his trial.
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3 April 1907
p. 4  In honor of the ‘brilliant performance’ of Delagrange’s airplane, Santos-Dumont is offering a gold medal to the Voisin brothers, the builders.
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5 April 1907
p.1   ‘M. Santos-Dumont s’envole mais retombe aussitôt’
If a future historian tells of the beginnings of aviation, he will say ‘The years 1906 and 1907 saw many aircraft hatch. They took off, they broke, they were repaired, and took off again. The aviators, never discouraged,, always energetic, sought the solution to the conquest of the air with an admirable tenacity’.
Yesterday Santos-Dumont tried for the Grand Prix [the Deutsch-Archdeacon prize], having gathered the AéroClub de France commission at St. Cyr. The 14 bis is too slow and has too much cloth surface for anything but completely calm air. The air at St. Cyr was very turbulent yesterday, blowing at 4.5-5 metres per second, according to Archdeacon’s anemometer. But during a calm spell at around 5 p.m. Santos-Dumont decided to try. He took off after a 10 metre roll; tilted right, then left; levelled the aircraft with his ‘lateral rudder’; flew some 40 metres; then the tail rose, dropped again, and entirely covered Santos-Dumont. There was a minute of anguish. But Santos escaped unhurt and calm. He will repair the 14 bis to try again. [A photograph shows the fuselage broken forward of the wing. It is unclear exactly what happened here. Perhaps the downward break of the fuselage seemed to trap Santos in his cockpit.]
10 April 1907
p. 4   Santos-Dumont is preparing a new aeroplane, with a 100 hp motor. It will be tried probably at  St.Cyr, where conditions suit only aircraft with small surfaces and high speed. Santos-Dumont intends to continue flying the 14 bis at Bagatelle. It is a place more suited to slower aircraft of great [wing] area.
[The new aircraft is presumably the No. 15]
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26 April 1907
p. 5   ‘Aéronautique’    Aviators have seemed to be on strike (‘grève’) for the past week. But they are at work.
Santos-Dumont is preparing his No. 15. This is the same as the preceding aircraft, except that the metal strips [? – ‘cloisons’] are of iron or aluminium rather than wood. The V-shaped cell [presumably the wing] and the rear cell are of walnut (‘noyer’). The place of the motor will be changed [no detail given].
The Voisin borthers are busy with an airplane destined for the Italian government. They will restart trials of the Delagrange machine in early May.
Blériot will build aircraft of the Langlet [Langley] type. Vuia is waiting for a motor for his new ‘uni-plan’.
[It is interesting that the newspaper gives this summary – as if a week without flights is now exceptional.
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21 May 1907
p. 6   Santos-Dumont has built a new dirigible and a new aeroplane. The first is of 100 cubic metres capacity, with a 2 metre propeller forward.
There is reference here also to distance balloon competitions (one yesterday), organized by the AéroClub de France.
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June 1907, in L’Aérophile, 15:6 p. 160.
Santos-Dumont’s 1907 aircraft [presumably the No.  15] has been repaired with slightly changed construction. The wings now have three layers of mahogany, connected with steel brackets [‘cornières’]. The aim is to prevent twisting. New trials will be with the 100 hp Antoinette motor [instead of the 50 hp Antoinette used in March].
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7 June 1907
p. 5   Santos-Dumont was prevented yesterday by rain and wind from trying his new No. 16. The ground was too wet for a launch. No. 16 is a combination of balloon and aeroplane; it is heavier than air, weighing about 80 kilograms [the net weight, after the lift of the balloon is subtracted from the total weight? – 80 kilograms is impossibly low for the all-up weight].
It has a varnished silk envelope, spindle-shaped [‘fusiforme’] of about 99 cubic metres capacity, and 21 metres long. There is an internal air ballonet.
The lighter-than-air envelope carries a 50 hp motor (taken from Santos-Dumont’s last aeroplane [the 14 bis or the No. 15?]), driving a 2 metre propeller. At the front is an elevator (‘plan mobile’) to control altitude change; further aft, between the motor and a polygonal rudder, is an aeroplane wing of 4 metres span. The pilot is on a saddle (’selle’) behind the motor. The whole machine rests on two bicycle wheels. The machine seems dangerous, since there is an 8 cylinder motor only 1 metre from the balloon [hydrogen filled].
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8 June 1907
p. 6   At the hangar at Neuilly Saint-James, Santos-Dumont is preparing his No. 16. He is very likely to try flying it early today. The motor is working very well.
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9 June 1907
p. 2   Santos-Dumont, yesterday at Bagatelle, had a slight accident with the No. 16, tearing the envelope. He took out his combined heavier- and lighter-than-air machine very early. The aircraft took off after a c. 50 metre roll, as Santos-Dumont advanced the ignition. The rear of the machine rose, because of the wing; but the front of the aircraft was held down by the weight of the motor. The front of the frame [sic] hit the ground, displacing the envelope so that it was hit by a propeller blade, which ripped it. Hydrogen escaped. Santos-Dumont cut the engine. [Note that the normal clearance of the propeller from the envelope is stated as only 2-3 centimetres.[
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19 June 1908
p. ?   Yesterday Santos-Dumont continued trials of the No. 16 at Bagatelle, not trying to fly, but doing trials for stability and steering. He will continue in the very early morning today.
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5 September 1907
p. 5   Santos-Dumont’s new aircraft is completely assembled, and ‘l’allumage est posé’ [the ignition has been set?]. The ‘sympathique aviateur’ has built at Issy a small hangar for the aircraft.
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17 September 1907
p. 6   Santos-Dumont is now working on both the adjustment of his aeroplane’s motor and the building of his hydroplane. This is ‘a sort of long cigar of impermeable cloth, inflated with compressed air, resting at the front and the back on wooden skates’. It is not know which of the two machines will be finished first. It is probably that the first trials of the hydroplane will be made next Monday. It will be ballasted and towed by a boat.
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12 October, La Vie au Grand Air, No. 473
p. 252  [François Peyrey] Santos-Dumont has finished a ‘canot-hydroplane’, which he hopes will reach 100 kph (with a 16 hp motor) – to win a 50,000 franc prize offered by M. Charron. It consists mainly of a long, thin hull [‘fuseau’], ten metres long. The wood and steel frame is covered with silk. The weight is 200 kilos.
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26 October, La Vie au Grand Air, No. 475
p. 290 [François Peyrey]: Santos-Dumont’s hydroplane, a ‘curious slider’ [‘curieux glisseur’] should be now have been tried on the Seine, towed by a power boat. This is Santos-Dumont’s eighteenth machine.
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14 November, p.5.
For several months past, Santos-Dumont has been working on a hydroplane. But he has just finished building a monoplane of 10 sq metres surface, with the form of a butterfly [‘papillon’]. Its 20 hp motor drives a two-bladed propeller in the nose. A flat surface [‘surface plan’] in the tail can move in all directions, like a bird’s tail. The total weight is 56 kilos. The first trials are today, weather permitting.
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15 November, p.5.
At Neuilly, Santos-Dumont has set the rudder controls of his ‘papillon’. He hopes to go out this morning.
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16 November, p.5.
Santos-Dumont has made the first trials of his new aircraft, named No. 19, at Bagatelle. Few were present to watch. The trial stopped because of the breakage of the axle of a wheel on the load-bearing chassis.
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17 November, p.5.
Santos-Dumont yesterday, at Bagatelle, flew about 200 metres in his new aircraft, and intends to try for the Deutsch-Archdeacon prize today, from 9 a.m. onwards, at Issy. Some think that a single trial does not warrant trying for so hard and delicate a task as the one kilometer flight. But Santos-Dumont has never backed away from challenges.
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18 November, p.4.
Santos-Dumont’s attempt at Issy for the Deutsch-Archdeacon prize yesterday was not a success. He made some flights of 50-140 metres, but broke some bamboo and some tensioners [‘tendeurs’]. Repairs were made, but he put off further trials until today.
[This article has with it a nice photograph of the aircraft, showing an all-moving four surface tail at the end of a single bamboo aft fuselage. ‘No. 19’ is written very large on a vertical panel in the nose. The pilot’s seat is below the wing. There is considerable dihedral on the monoplane wing.]
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20 November, p.5.
Santos-Dumont made brief flights at Bagatelle yesterday. Some modifications were needed, so he did not go to Issy to try again for the Deutsch-Archdeacon prize, as planned.
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22 November, p.5.
Santos-Dumont yesterday at Bagatelle tried for the 150 metre prize of the AéroClub de France. He made two flights of about 100 metres; and then, as he was taxiing back to the departure point one of the propeller blades separated from the shaft, as a result of violent vibrations. The blade flew over the car of M. Tissandier, who was observing the trials, and came down 100 metres away. Luckily no spectator was hit. There was some damage to the aircraft.
Santos-Dumont told a reporter that he would cease aircraft trials for a month to go back to his hydroplane.
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22 November, p.5.
Officials of the AéroClub de France observed Santos-Dumont at Bagatelle today.
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23 November, La Vie au Grand Air, No. 479.
p. 408  Has three photographs of the Santos-Dumont No. 19 at Issy. Last Sunday he flew some fine flights [‘belles envolées’] of 50-150  metres. The aircraft weight is 56 kilos (including 22 kilos of motor); the length, 8 metres; span, 5.1 metres. [This is the first version of the Demoiselle, apparently with only one rod between wing and tail, though a great many wires, presumably securing the tail. The tail is cruciform.]
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1908

25 January, p.5.
Santos-Dumont is still active, at Neuilly St. James [the remains of an 18th century park of that name]. The monoplane he tried last week is now ready, and he awaits only a rise in temperature to start trials  at Bagatelle. Santos-Dumont is also preparing another monoplane with two propellers turned by two 8 hp motors set on each side of the fuselage (which is c. 6 metres long).
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21 March, p.5.
Santos-Dumont continues trials of his mixed dirigible [‘dirigeable mixte’]. He has been travelling. After the aircraft had rolled for about two minutes, one of the two propellers (which serve at the same time as flywheels [‘volants’] and for propulsion), broke. No accident followed.
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27 May, p.5.
A list of aircraft now flying, or soon to do so, does not include any reference to Santos-Dumont.
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The Automotor Journal, 14 November 1908, p. 1497, ‘M. Santos Dumont’s New Monoplane’
]This is the Demoiselle, of which this page carried two photographs – one of the nose, with low-mounted engine and propeller, and the other from the left side, showing the long bamboo pole forming the fuselage aft of the motor, wing, and main wheels.  The propeller is driven by a wide belt, with a smaller pulley on the engine and one about twice the diameter on the propeller  -- reducing rotational speed for the propeller. On each side of the drive belt are long, thin radiators, tilted a little outwards from the base.]
Total weight is ‘within’ 150 kilograms, and the width of the wings 5 metres. The wing surface of 9-10 square yards ‘compares favourably’ with the c. 60 square yards of Farman’s plane.
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18 November, p.4.
The preparation for flight [‘mise au point’] of the Santos-Dumont monoplane has been done at Issy.
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25 December, p.2.
The Santos-Dumont Demoiselle is displayed at the Grand Palais in the Salon d’Aéronautique.
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1909

9 April, p.1.
Santos-Dumont flew his Demoiselle at St. Cyr yesterday, for 2,500 metres and at an altitude of 20-25 metres. The take off run, on wheels, was at most 20 metres. He could have flown further, but was headed over a lake and did not want to come down in it if his engine failed. The aircraft is now as it was shown at the Exposition [late December 1908], with a wingspan of 5.2 metres, length of 6 metres, all up weight of 120 kilos at take off, including the pilot. There were present some 1,500 spectators, including many pupils of the St. Cyr school.  [A photo here shows the aircraft, nose up after take off.]
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27 April, p.5.
Aircraft now at Issy include Santos-Dumont’s Demoiselle.
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16 May, p.5.
Santos-Dumont is flying the Demoiselle at Issy. Yesterday he made two flights in a calm period in a windy day. The first crossed the whole field. The second consisted of hops because of loss of engine power. On a third flight a gust pushed the aircraft down, breaking a piece of it (the forward rudder-indicator [‘gouvernail-témoin d’avant’]).
Santos-Dumont removed this indicator (considered to be useless) from the aircraft. At about 7 p.m. he departed across the field closely guarded by municipal officers (free), and policemen (paid). He managed hops. But then a gust pushed the aircraft down on to the right wing, with damage to some tubes in the frame.
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[This is the last entry in Le Matin for Santos-Dumont before the Grande Semaine at Bétheny in August 1909. He does not seem to have flown in that competition.]
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Santos-Dumont came onto the airplane-flying scene in Paris very prominently in the fall of 1906, when he flew his 14bis at Bagatelle, in the Bois de Boulogne, becoming the first pilot in Europe to have taken off and flown, unequivocally and before witnesses. In the 1907-1909 period, however, he was much less prominent. Le Matin pays little attention to him. He tended to stay away from the fields where other pilots were active, although he did certainly fly at Issy, as the above entries show. In the fall of 1907, in an early version of his Demoiselle machine, he hoped to take the Deutsch-Archdeacon prize, but did not come close to the required distance. In 1908 he faded from the public scene. During that year he may have concentrated on setting up manufacture of his Demoiselle aircraft, which after 1909 became a popular aircraft in Europe.

Leon Levavasseur

2 February 2017


Levavasseur


Scientific American supplement (No. 1620), 19 January 1907

p. 25,957 has a photograph of a 24 cylinder, 360 hp, Levavasseur gasoline engine, weighing 3.6 lbs/hp. The caption notes that this is three 8 cylinder engines on one crank case (and the photograph shows that it is a V engine). It also has two ‘high-tension [voltage?] distributors’ at each end, ‘driven from the half-speed crankshaft’.

p. 25,958 [text on this engine] Refers to the success of Levavasseur’s existing lightweight Antoinette motor, which is ‘probably’ the motor with the lowest weight/power ratio yet reached. The Antoinettes are much used in motor launches, but also in the aircraft of Santos-Dumont, Ferber, and other ‘aeroplane workers’. The first motor produced 25 hp; then 50 hp; and now the 360 hp design is ‘by far the largest light-weight motor ever built’. Total weight is 600 kg (1,322 ¾ lbs), giving 3.67lb per hp. The engine consists of three 120 hp units of 8 cylinders each, on a common crankcase. There are 24 cylinders of 150 mm (5.905”) bore and stroke. Aluminium is widely used in the construction. Hollow steel shafts reduce weight.. The cylinders are ‘turned inside and out’ and fitted with sheet brass water jackets. The total length is about 3 metres (9.84 ft). The motor runs at 900 rpm. It is designed for a racing launch now being built, which will be entered for the 1908 races at Monaco.

[Full details of an earlier Levavasseur motor are in Supplement No. 1612]

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Scientific American, 23 February 1907

p.165 A paragraph on the Levavasseur Freak Motor Boat with an Antoinette motor:

This boat is driven by one of the light motors ‘previously mentioned’. The motor is rated at 50 hp. Its weight is 132.27 lbs (or 176.36 lbs with all accessories, ready to run). A boat with this motor went at a ‘good speed’ on the Seine, piloted by [among others] Captain Ferber and Alberto Santos-Dumont – ‘who were favorably impressed with its performance … giving almost the same sensation as an aeroplane in the air’.

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L’Aérophile, 15 February 1908 (reproduced in Aéro France, February 1958, 10:2, in MAELB)

p. 25 Captain Ferber, ‘Le moteur Antoinette’

An inventor made electrical machines, and a capitalist owned in Algeria a factory that made electric light – but the machines sometimes stopped. The inventor – Levavasseur – modified a few wires, and light was restored. The capitalist, Jules Gastambide, from that moment had much confidence in Levavasseur. So when Levavasseur proposed making a lightweight motor, Gastambide gave him a carte blanche.

That was in 1903. The motor was made, and installed in a boat that immediately achieved high speed. Levavasseur proposed that the motor be named after Gastambide’s daughter – Antoinette.

Antoinette powered boats won at Monaco in 1904, 1905, and 1906. In 1906 one of them reached an average of 50 kph over 200 kilometres, on Lake Gard.

The fame of the motor drew Ferber to Levavasseur in 1905. He wanted a powerful and light motor for an aeroplane. It was then that Ferber understood the motor. For efficiency, it must have many small cylinders. This is because an internal combustion engine undergoes very short, very powerful stresses on each ignition. All parts must be designed for this stress. If they could function continuously, they would produce a much greater force. [This is Ferber’s reasoning.] This is the principle of the turbine, and also is why Antoinette motors have between 8 and 32 cylinders. For each revolution there are more small explosions [if there are more cylinders], and the weight of components can be reduced. Moreover, use of many cylinders allows the suppression of a flywheel, which saves considerable weight.

On the Antoinette motor, the direction of rotation can be reversed by pressing a button that operates on the cam shaft. This is useful for boats and dirigibles.

In 1905 Ferber asked his superiors for credits to buy a 24 hp Antoinette motor. But the motor was not yet even designed, and so he was forced to order it at his own cost. After him, others who ordered it were Santos-Dumont, Blériot, and others. Seeing this, various capitalists, led mainly by Blériot, formed a company for the exploitation of the Antoinette motor. That was in May 1906. M. Gastambide was president of the administrative committee, and Blériot, vice-president.

That allowed for larger premises and tooling, Nowadays, everything is factory made, to 1/100 of a millimeter. For that reason the motors are expensive. Workers cannot hurry with such fine work. There exists a building called the ‘batterie basse’, because it looks like the battery of an old, three deck ship. There four motors can be tested at a time on benches. These benches are made to measure the torque of the motors by the means suggested by Colonel Renard, absorbing power through the intermediary of a moulinet [a rotating resisting device of some sort?].

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L'A'erophile, 15 February 1908 (16:4)

'Portraits d'Aviateurs Contemporains. L'eon Levavasseur'

Born 8 January 1863 at Cherbourg, son of a navy ('marine') officer. After brilliant studies at Angoul^eme, he went to Paris at age 17, intending to study fine arts. He wanted to be a painter. But he was seduced by electricity. He invented an arc lamp, and entered the Patin factory as an engineer. There he invented transformers and alternators. At Orleansville he set up 'un premier transport de force par courants alternatifs'. Then he studied gasoline ('p'etrole') motors, taking apart the motors then available. He left the factory in 1901 and set up on his own. In 1902 he proposed to Jules Gastambide the building of an aeroplane. From that came a light motor that he tried out at Monaco on the boat Antoinette – this was the motor so sought after by aviation men after 1905. The Soci'et'e Antoinette was formed, of which L. was the technical director. He followed the fundamental laws of mechanics rather than detailed formulae [copy illegible on last -23 lines].


58 ''Histoire du moteur “Antoinette”'


An inventor and a capitalist – the inventor made electric machines and the capitalist had in Algeria an electric light company – where the machines sometimes stopped. Levavasseur, the inventor, modified some wires, and the troubles stopped. The capitalist, Jules Gastambide, had confidence in Levavasseur. So, when L proposed the making of an extra-light motor, which would revolutionize the world, G gave him a carte blanche. This was in 1903. The motor was made and fitted to an aeroplane. Trials were made secretly at Villotran (Oise) . No shelter had been made for this plane, so that wind and rain put it out of service. Gastambide had little faith at that time in the commercial future of planes – so wanted to put the motor into something more sellable.

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Lucien Marchis et al, Vingt-cinq ans d’Aéronautique française, 2 vols., Chambre Syndicale des Industries Aéronautiques, Paris 1934.

pp. 46-7 On the Antoinette V8 motor: direct injection to each cylinder gave the motor greater power. But there was a disadvantage in the small diameter of the injector orifices, which was only 2/10 of a millimeter. The slightest impurity in the fuel would block the injector, causing the cylinder in question to stop functioning. It was impossible to know which cylinder had failed without inspecting all the orifices. A mechanic had to do this before every flight, especially because of the difficulty of turns [in which maximum power was needed?]. [note 1, p. 47 says that Herbster, Farman’s mechanic, prepared the Voisin-Farman 1 for the Deutsch-Archdeacon prize flight by dismounting all the injectors and passing through all the microscopic injection holes the bristles of a brush of suitable dimensions. This was related my M. Clerget, who was in Farman’s hangar at Issy, along with Archdeacon.]

The cooling of the Antoinette motor: water, leaving the engine, was sent by an ‘ordinary pump’ to a water/vapour separator. Steam passed to a series of light aluminium collectors mounted on a copper ramp and placed along the sides of the fuselage, where they received wind blown back by the propeller. These collectors constituted a steam condenser. Another pump sent condensed water to a reservoir above the engine. [This may have been the system installed on some aircraft, for example the Antoinette monoplane of 1909 onwards. It was not used on the Farman aircraft of 1907 and early 1908, on which steam from the engine was apparently allowed to escape. Within minutes the engine had no cooling fluid. By mid 1908 some system of condensation of steam and recirculation of the water, probably through a radiator, was being used by Farman and Delagrange.]

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Leon Delagrange


Léon Delagrange’s Voisin aircraft flying probably on 30 March 1907 at Bagatelle (in the Bois de Boulogne). The pilot is Charles Voisin. The longest flight achieved that day was 60 metres. Delagrange himself does not seem to have started flying the machine regularly until 1 November 1907, although he made some very short flights in July of that year. Note the biplane front elevator and the large rudders (fitted on both sides) behind the tail. These were later replaced by a single rudder in the centre of the tail.

References here, except where noted otherwise, are to the newspaper Le Matin

L’Aérophile, March 1907, pp. 63-5  ‘L’aéroplane Delagrange’
Mechanical flight today is a problem of concern not only to technicians. Modern ‘conquistadores’ will give man the vast empire of the air. To this end a great variety of energy and intelligence is turned. There are ‘sportsmen’, engineers, skilled workmen, men of knowledge, and artists
Among the latter, a young sculptor who has sent pieces to recent salons – M. Léon Delagrange – has decided to move from theoretical study to direct experiment. He has ordered from the Voisin brothers, at Billancourt, an interesting airplane, to be described here.
It has two ‘sustaining surfaces’, cloth covered, superimposed, of 10 metres span and 1.8 metres fore and aft [chord]. A quadrangular fuselage [sic], cloth covered, carries at its front end an elevator [‘gouverneur de profondeur’] with two planes; and at its rear the light seat [‘banquette’] on which the aviator sits – with the motor behind him (a 50 hp Antoinette, driving a two bladed propeller with a steel hub and aluminium blades of 2.3 metres diameter).

The tail is connected to the wings by four wooden longerons, with stays and braces. The tail consists of a cellular [biplane] structure with two horizontal planes and three vertical partitions, behind which is a vertical rudder.
The aircraft rolls on three tyred wheels with a suspension of shock absorbing springs [‘ressorts amortisseurs’]. Two wheels are under the wings, and one under the tail. The lifting surface is 60 square metres, and the weight, 290 kg.
The first trials of the aircraft were at the ‘polygone’ of Vincennes on 28 February. If any accident happened to delay flight, it is only a matter of delay. The aircraft is among the most interesting and will surely fly.
Around 2.30 p.m. on the 28th February the aeroplane arrived (disassembled) at the trial field, carried on three trucks [‘camions’] which were escorted by an annoying crowd of children [‘gamins’] from Vincennes. Delagrange was present, at the western corner of the field, where other notables of the automobile and
 p.65   aeronautical world also looked on. Those noted as present were MM. Santos-Dumont, Archdeacon (president of the aviation commission of the AéroClub de France), Henry Kapferer (who will soon start trials of his own airplane), the comte de Fayolle (president of the AéroClub {or Automobile Club} and a fanatical supporter of all mechanical locomotion], Robert-Guérin, Paulhan, etc.; and many officers from the Vincennes garrison.
Assembly of the aircraft by the Voisin brothers took an hour. The machine had a seductive appearance, and admirable finish. It was placed into the wind (light, from the north-east). But the ground was very soft and uneven, which made reaching take-off speed hard.
Gabriel Voisin took the pilot’s seat. The motor was started, and the aircraft released. It gained moderate speed with the thrust from its propeller (some 15 kph). The machine ran for some 50 metres, and then the fuselage broke just aft of the main wings. (A photograph of the machine in this state is on p. 64.)  The propeller, hitting the ground, was bent; but the motor was undamaged. But the damage was less than it appeared. The machine will be repaired in a few days. Voisin, the pilot, was unhurt, and showed remarkable sang-froid.
Thanks to Colonel Bon, Delagrange has placed his machine in a place that belongs to the dragoons at Vincennes, only a few metres from the ‘polygone’. He will be able to continue trials there.
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1 March 1907
p.2  ‘Un aéroplane se brise pendant le premier essai’
The first trial of Delagrange’s plane took place on 28 February 1907. Present were Santos-Dumont, Delagrange, Archdeacon, Kapferer, de Fayolle and many photographers and cinematographers. The trial took place at the ‘polygone de Vincennes’. The aircraft has an 8 cylinder, 50 hp motor [an Antoinette]. The propeller is 2.1 metres long. The wing area is 60 square metres. The aircraft was quickly assembled under the eyes of the Voisin brothers, the builders. The motor was tried. Gabriel Voisin took his place in the fuselage, with controls for the elevator [‘équilibreur’] and the rudder. The aircraft ran some 50 metres at moderate speed, then reared up. With the nose up, the propeller hit the ground, and bent. Voisin calmly cut the ignition and left the machine. Repair will be easy. The propeller is just bent, and a few struts are broken. The accident was probably caused by a shift of weight at the aircraft was about to take off. Progress comes by trial, error, and modification. The aircraft has been placed in a hangar lent to Delagrange by the military government of Paris at the  dragoons’ barracks at Vincennes (caserne des dragons de Vincennes’).
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23 March 1907, La Vie au Grand Air, No. 444
François Peyrey, [on the first flight of the Voisin/Delagrange biplane at Bagatelle, 16 March 1907]
Charles Voisin was the pilot. The aircraft had 30 kilograms of reinforcement of its structure. Voisin made 5 attempts at flight. On the first three he struggled against the annoying tendency of the machine to swerve left (and also against the annoying tendency of the spectating crowd to get in the way).
On the fourth try, at 3 p.m., the aircraft flew some 10 metres at 75 cms height [a picture shows it with the port wing low]; and again at 3.45 p.m.. Delagrange and the Voisins are to be congratulated. [This is the first flight of a powered aircraft built by the Voisin brothers.]
Their ‘flight studies’ will continue at Vincennes where, though the ground is much less easy to taxi on [‘roulant’] than the training field [at Bagatelle?], there is fencing to protect the public from its own imprudence, and the aviators from the public.
The dimension of the aircraft: span, 10 metres; chord of wing, 1.8 metres; motor, 50 hp; propeller, 2.3 metres diameter; lifting surface, 60 square metres; elevator [‘gouvernail de profondeur’] at front; a biplane [‘cellulaire’] tail at the rear; a vertical rudder [‘gouvernail vertical’].
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6 April 1907, La Vie au Grand Air, No. 446
François Peyrey, ‘L’Aéroplane Delagrange a volé’
On 30 March Charles Voisin flew the machine 60 metres, at a height of 2-4 metres. The flight, at 12.30 on the ‘pelouse de Bagatelle’ [in the Bois de Boulogne] took 6 seconds. [This was the second occasion of Charles Voisin’s flying the machine.] This flight confirms the promise of the aircraft shown on 16 March [above].
Charles Voisin made several attempts at flight, with one hop [‘essor’]. The aircraft showed a tendency to turn left, so weight was added to the right wing. After that it flew straight. Peyrey attributes the left turn tendency to a torque effect from the propeller. Stability was perfect, and the landing gentle on rubber tired wheels. After the flight the Voisin brothers ‘threw themselves into each other’s arms, very emotionally’, and Santos-Dumont, who was present, applauded.
The propeller has a steel arms and aluminium blades. The total weight is 290 kilos. [That seems surprisingly low. Later examples of basically the same airplane weighed over 500 kilos] The tail is attached with four ‘light longerons’ of wood, braced and guyed [‘bois entretoisés et haubanés’]. The ‘fleet’ of flying machines now consists of aircraft of Santos-Dumont, Delagrange, Vuia, and Blériot; to which will soon be added [those of] Henry de La Vaulx, Archdeacon, E and P Zens, H Kapferer, Ferber, Levavasseur, Vinet, Fauber, Melvin-Vaneman, Barlatier-Blanc, E Seux, Solirène, Léger, Cornu, Robert, Colomb ‘et tutti quanti’. [Some of whom seem not to have gone any further.]
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L’Aérophile, April 1907, pp. 103-106. ‘Nouveaux essais de l’aéroplane Delagrange. Un troisième engin automoteur plus lourd que l’air, monté, réussit, en France, à quitter le sol, en vol libre et franchit 60 mètres.’
AFter Santos-Dumont’s  and Vuia’s flights, a third aircraft has succeeded in taking to the air in France. This is the Delagrange aircraft, built by the Voisin brothers.
On 7 March the aircraft was taken to the ‘polygone’ of Vincennes, behind the dragoons’ site. The main purpose was to see if the repair made after 28 February was adequate [the fuselage had broken just behind the wings]. The field at Vincennes is completely closed, but rough and with ruts. The aircraft was placed into wind (a breeze of 5-6 metres/second). Charles Voisin took the pilot’s seat. He is a little heavier than Gabriel; but Gabriel had wished to see the aircraft perform the better to judge its qualities and faults.
At 4.20 p.m. the aircraft moved slowly forward, under power. It seemed to grow lighter, so that the problems caused by the roughness of the ground were lessened [the wings are presumably providing some lift]. After 20-30 metres, Charles Voisin moves his controls and the wheels are no longer on the ground. But at the same time the machine seemed to pitch up, as on 28 February. Two vertical pieces had failed at the junction of the rear and the wings. The propeller touched the ground and was bent. Charles Voisin was unhurt and emerged smiling.
The aircraft was lifting  at a moderate speed of perhaps 20 kph. The ignition had not been advanced [to increase engine revolutions}. With the engine at full power there should be an excess of lifting force.
This prediction was confirmed on 16 March, when the aircraft flew. This happened at Bagatelle, where Santos-Dumont made his first flights.
p. 104   [On this page are line drawing of Delagrange’s aircraft, seen from the left side and from the top. Dimensions are included.] s
The aircraft had been reinforced at the places [just behind the wing] where it had shown weakness. Weight increased by some 30 kg.
On 16 March, five attempts at flight were made.  The first was a ground run at 11.15 a.m., to test the solidity of the aircraft. Some 200 metres were covered at slow speed.
On a second trial, at midday, one of the front wheels left the ground.
After lunch, true attempts at take off were made. At 2.45 the aircraft made a run, without lifting, and drifted left. This trial was  repeated, and, after a run of 80-90 metres the machine clearly left the ground for about 10 metres (after a barely perceptible movement of the forward elevator). The pilot cut the ignition, fearing a drift to port. The last trial, at 3.45 p.m., produced a very clear flight – but it was interrupted by the imprudence of spectators, who were in the way. Gabriel Voisin had given his place, for these trials, to his brother Charles – who seemed to gain confidence with each attempt. The wind was quite strong from the east or south-east, but irregular, with quick changes in speed and direction.
Since too large a crowd was gathering, the machine  was dissassebled and taken back to Billancourt.
Back at Vincennes, on 21 March, the men pushing the plane into position broke parts of the wing and the lower fuselage. The damage was not severe, but had to be repaired.
On 30 March, Charles Voisin piloted the plane to definitive success. It was only one month after the first trials. This was at Bagatelle, definitely a better launching ground than Vincennes. Present were Santos-Dumont, Robert Esnault-Pelterie, Henry Kapferer, Forestier, François Peyrey, André Fournier, Robert-Guérin, G. de Lafreté, and others. Delagrange placed his aircraft into wind, at the bottom of the slope that comes down from the Suresnes road toward the vast area of grass. Charles Voisin was the pilot. The first sortie was just a trial run, to test that all was in order.
On the second attempt, the plane flew at 80 centimetres for about 20 metres. At 11.50 a.m. it flew at 2 metres height for 25 metres (in 4 1/5 seconds). But propeller rotation made it bank left.
A copper cylinder weighing 2 kg was added to the right wing tip. Further flying was blocked by the crowd – sympathetic but in the way. But the arrival of lunch time drew the merely curious away. Only some fifteen ‘fanatics’ stayed.
At 12.45 p.m. Ch. Voisin tried again. The aircraft rose to 2-4 metres. It was fully stable this time, and flew 60 metres in 6 seconds – i.e. at 36 kph. There seemed no reason why the flight should not have continued indefinitely. But Ch. Voisin had thought the demonstration sufficient for the day.
After modifications the Voisin airplane now weighs 450 kilograms [a considerable weight gain from the initial 290 k.].
L’Aérophile sincerely congratulates Léon Delagrange. He has great faith in aviation, and has fully engaged with it. Now his ‘fine audacity’ has been rewarded. Delagrange wishes that great credit should also go to the Voisin brothers. The two young Lyonnais have come to Paris to practice aviation, equipped only with their energy and enthusiasm.
p. 106   [The article contrasts French aviation with the car industry there] The latter has ten years of experience now, whereas aviation is just beginning, and has little experience to draw on. Calculations are still based on uncertainty. Aviation builders are still concerned that they may make aircraft too heavy – in which case they will not fly – or to light, in which case they will lack strength. Flights to date are modest, certainly; but they will soon be longer, and the first difficulties of mechanical flight have been overcome. Other difficulties, such as those of balance, will be resolved in due course. The year 1907 has begun well for aviators.
The magazine corrects its earlier statement that the propeller diameter on the Voisin machine is 2.3 metres; it is 2.1. Its pitch is 1.05 metres. On 21 March two rudders were added to the rear extreme of the tail assembly. This change increased the aircraft’s weight.
[The praise of Delagrange, and respect for him, expressed in this article are slightly surprising. He is not flying the aircraft, and has not contributed to its design. He has merely bought it from the Voisin brothers. But L’Aérophile’s attitude towards him probably reflects the state of French aviation at the time. It is the buyers of aircraft who are seen as pushing French flying forward, not so much the builders and possessors of technical knowledge. The amateur of flight is the propulsive force. On the other hand, the article is fulsome in its praise of the Voisin brothers. This is their first successful machine, and was in the rest of 1907 to show itself the most advanced of all French machines.]
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9 April 1907,
p. 4  Bagatelle.  Delagrange tried yesterday to win the Archdeacon cup now held by Santos-Dumont [in the 14bis, presumably] for a 220 metre flight. Archdeacon was present. After he had marked out a part of the lawn with bags of plaster, Charles Voisin flew about 50 metres, at a height of some 3 metres. At that  point the aircraft came over a group of spectators who did not get out of the way quickly enough. Voisin, fearing an accident, cut the ignition. The aircraft, still very stable, landed. Its wheels and frame were slightly bent, but there was no other damage. [The difficulty with Bagatelle was its openness to the public and its quite small size relative to the speed of the aircraft. It is interesting to see that Voisin marked out an area for his flight; but it was not big enough (or he went off track), and he had to stop.]
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10 April 1907
p. 4   Delagrange is thinking of designing [‘établir’] a new aircraft with a much smaller [wing?] surface. The Voisin brothers, who made the Delagrange appareils [plural sic], would be willing to make a monoplane on the Langlet [Langley, presumably] system. Vuia has just finished a new aircraft, a modification of his No. 1. It will be fitted with a kerosene (‘pétrole’) motor or a small steam turbine.
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L’Aérophile of May 1907, pp. 103-106, adds some detail to earlier accounts.  [Only what is not said above is included here]
The first attempt at flying the Delagrange machine was made on 28 February 1907. The fuselage broke behind the wing. After repairs, another attempt was made at Vincennes on 7 March. The fuselage again broke aft of the wing. On 16 March, this time at Bagatelle (in the Bois de Boulogne), after strengthening of the fuselage, five trials were made, with brief flights (of c. 12 metres) on the fourth and fifth attempts. On 21 March, again at Bagatelle, the aircraft suffered light damage to the lower wing and fuselage. Finally, on 30 March at Bagatelle, at 12.45 p.m., came full success, with the aircraft flying, on its fourth attempt, some 60 metres at a height 2-4 metres. Present were Santos-Dumont, Esnault-Pelterie, Kapferer, Forestier, François Peyrey, André Fournier, Robert-Guérin, G. de Lafreté, and others. Spectators were in the way, but many left for lunch, which made the field less crowded. The 60 metre flight took 6 seconds. Speed was therefore 36 kph. The aircraft weight, after modifications, was 450 kg.
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9 April 1907,
p. 4  Bagatelle.  Delagrange tried yesterday to win the Archdeacon cup now held by Santos-Dumont [in the 14bis, presumably] for a 220 metre flight. Archdeacon was present. After he had marked out a part of the lawn with bags of plaster, Charles Voisin flew about 50 metres, at a height of some 3 metres. At the point the aircraft came over a group of spectators who did not get out of the way quickly enough. Voisin, fearing an accident, cut the ignition. The aircraft, still very stable, landed. Its wheels and frame were slightly bent, but there was no other damage. [The difficulty with Bagatelle was its openness to the public and its quite small size relative to the speed of the aircraft. It is interesting to see that Voisin marked out an area for his flight; but it was not big enough, and he had to stop.]
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12 May 1907
p. 6    There are rumours that Delagrange is abandoning trials of his aircraft. The ‘sympathique aviateur’ has firmly denied this to Le Matin. His lack of activity has been the result of bad weather, lack of suitable space, and the business of the builders of the machine [the Voisin brothers]. As soon as the weather improves the Voisin brothers and Delagrange will resume trials of the aircraft, which has not had any modifications.
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19 May 1907
p. 6   Today, at Le Touquet, Delagrange and [Charles] Voisin will do trials of gliding flight, with a ‘small Chanute apparatus without motor’.  [It is presumably Delagrange who is flying the trials. He has gone to the Channel coast with Voisin to improve his flying skills.]
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8 June 1907
p. 6   Delagrange [still described as a ‘sympathique aviateur’], having recently had experience on a motorless airplane in the North [see 19 May above], is now back in Paris. The next trials of his aircraft will be at Issy-les-Moulineaux.
[This is the first reference to Issy in 1907. Did Delagrange get any basic piloting experience at Le Touquet? There is no earlier reference to his piloting. Reports are that Charles Voisin flew his aircraft in the spring of 1907. The next note indicates that there was a plan to fly the powered Voisin machine at Le Touquet. That does not seem to have happened.]
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8 June 1907, La Vie au Grand Air, No. 455
p. 387, François Peyrey, ‘L’Aviation au Touquet’
Trials of the powered airplane of Léon Delagrange will be continued soon at Touquet-Paris-Plage. Delagrange has been there several times and will build a hangar for his machine. ‘Very recently he carried out there, in collaboration with MM Charles Voisin, Henry Farman, and Colliex, some gliding flights of around 40 metres length, using a simple airplane, without motor, of the Chanute type and with 18 square metres of surface.’
Delagrange’s powered machine will find a remarkable field of action on this immense space [‘plage’].
A photograph shows what looks like Gabriel Voisin standing in the centre section of a glider. [It is impossible to tell from this article whether Delagrange or Farman, or both, flew this glider. If Farman, it would be the beginning of training as a pilot for him.]
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La Revue de l’Aviation, 15 July 1907 (No. 8, 2me année)
p.13       Delagrange, after making some very short flights (the longest being about 200 feet), has decided to go to the sand dunes outside Le Touquet to fly a glider with M. Voisin [presumably Charles Voisin, who had piloted Delagrange’s aircraft in March 1907]. The glider will first be tried as a kite, and various measurements (drag, lift, position of centre of pressure at different angles of attack) will be taken. Gliding trials will be made by running and jumping into the wind, recording the angle of descent. This is a great sport, and the chances of accidents are small for prudent men who proceed slowly. Gliding gives the experience needed before one can fly a powered aircraft.
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17 July 1907
p. 6   Delagrange’s aircraft is soon to restart trials after a period of calm (before which it achieved its first  gliding flight [‘vols planés’]). In company with M. Archdeacon, Delagrange is resuming his efforts. A hangar is being built at the Lac d’Enghien, where trials will be made over water. The aircraft will have two floats. [This was not done. The reference to gliding flight by the aircraft is puzzling. Where and how could that have been done? Perhaps the article is referring to Delagrange’s gliding flights outside Le Touquet, not done in his Voisin-built machine.]
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14 August 1907
p. 5   At the Lac d’Enghien Delagrange and Archdeacon have put up a vast hangar in which is stored the Voisin aircraft – which will be tried over the lake.
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22 August 1907
P. 4.   Delagrange and Archdeacon, having experiences great difficulties on the lake at Enghien, have decided to continue trials at Issy, next week.
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27 August 1907
p.6   Before some hundreds of spectators, Delagrange has resumed trials of his aircraft at Issy. The pilot is Charles Voisin. The aircraft has been slightly modified in the nose, and shows good stability.
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28 August 1907
p. 5   Yesterday there were more trials of the Delagrange aircraft at Issy. These were stopped by a small incident – the ‘instantaneous discharge of the accumulators’, and the breaking of two struts in the elevator. The aircraft is stored in the hangar belonging to Farman, which causes some confusion, because some thought that it was Farman’s machine that had gone out. But its trials will be in 4-5 days.
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3 September 1907
p. 5   At Issy the Delagrange-Archdeacon aircraft was set in motion on Sunday morning, but did not fly. The trial was above all for adjustment of the motor. [The identification of the aircraft as being of Delagrange and Archdeacon – this is not the first time it appears -- is interesting. Archdeacon must be working closely with Delagrange in this phase of his machine’s trials.]
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25 September 1907
p. 6   Yesterday morning and afternoon the Delagrange-Archdeacon aircraft, ‘with M. Voisin aboard’ [probably Charles] taxied ten or so times, but not fast enough to take off.
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26 September 1907
p. 4   M. Voisin [probably Charles] performed 5-6 trials of the Delagrange-Archdeacon machine. On the first the aircraft lifted on one side and was immediately stopped because of uncertain balance. In other trials the aircraft was stable, but stayed on the ground. [This seems excessive caution. Charles Voisin after all flew this aircraft in March 1907.]
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27 September 1907
p. 5   The aircraft in which Charles Voisin last spring made ‘conclusive trials’ was tried again yesterday at Issy. (At Enghien it was realized that the motor was not powerful enough to lift it off the water.) Yesterday at Issy the machine was launched five times. On the last attempt it rose to 1.5 metres and flew 45 metres with perfect stability. Charles Voisin was the pilot.
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1 November 1907
p.6     Delagrange ‘mounted his aeroplane for the first time’. He learned about the controls. He will continue practice today.
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6 November, p.4.
Yesterday Delagrange was flying at 2-3 metres when he tried to turn. He started well on the correct arc, but then the left wing dropped, hit the ground, and broke. The forward elevator broke in two. The frame [‘châssis’] twisted and hit the ground. Delagrange was thrown forward but not hurt; the airplane, however, received mortal wounds. Delagrange said that after his started the turn, he tried to use the rudder in the tail, but the cable broke. He will exchange this airplane for another now being built. He did in fact make a turn, which was previously thought impossible. [Why? Farman had already turned.] Farman flew to Delagrange’s aid from the other end of the field (600-700 metres).
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27 December, p.5.
Tomorrow Delagrange will inaugurate his new biplane [‘cellulaire’]; as will also Gastambide and Mangin (who has a monoplane).
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1908
8 January, p.5.
Strong winds prevented trials yesterday at Issy. Delagrange’s new biplane is assembled. First trials will follow soon. He intends to make endurance trials, and will probably go to Satory or Beauce after the initial tests.
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18 January, p.6.
Yesterday Delagrange did trials of his new aeroplane at Issy. The purpose was adjustment [‘mise au point’] of the machine. The rear cell had too much incidence, so that the forward elevator dug into the ground and two ash mounting uprights [‘montants’] broke. Repairs are to be made this morning, for new trials tomorrow afternoon.
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19 January, p.4.
Delagrange yesterday took his aircraft out at Issy in thick fog (less than 50 paces visibility), sat on the seat, and made ¾ hour of trials on the ground. Then he spent 20 minutes looking for the way back to the hangar. He says that, with the tail adjusted slightly, the aircraft will fly – possibly tomorrow.
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21 January, p.4.
Delagrange, who last spring opened the way for Henry Farman, yesterday did trials of his biplane at Issy.  The tail surfaces are now perfectly adjusted, and the aircraft flew 100 metres.
[Delagrange bought an aircraft from the Voisin brothers in spring 1907. That is the only way in which he ‘opened the way’ for Farman. He barely tried to fly the machine before the autumn.]
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31 January, p.5.
Delagrange had engine trouble yesterday at Issy. When he tried to take off, the engine produced explosions ‘of fifteen hundred devils’. It sounded like a machine gun in combat. The machine was towed back to the hangar.
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27 February, p.4.
Delagrange’s motor has been completely checked in the past period of bad weather, and will now be refitted to his biplane for immediate trials.
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13 March, p.5.
Like Farman, Delagrange is in a hurry. Yesterday he did stability trials. All went well. He even risked some ‘cautious take offs’ [‘timides envolées’] of 80-100 metres. Finally the state of the ground forced him to return to the hangar.
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15 March, p.5.
Delagrange said he had been waiting a year – since 16 March 1907 precisely – to be able to fly without danger or anxiety. That time, he says, has come. Yesterday he flew straight for 300 metres, practicing movement of the forward elevator. His flight distance was limited only by the length of the field. [Possibly true, if he did not start from the edge of the field. Using the whole length, straight flights of 700 metres could be made at Issy.]
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17 March, p.5.
Yesterday Delagrange made three flights of 500-600 metres.
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18 March, p.5.
Delagrange on 16 March used fuel that fouled his motor, so has been able to fly only a short distance. The motor needs a thorough cleaning.
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21 March, p.1.
Yesterday morning Delagrange made 7 flights of 700-800 metres, using the whole field length. He will try to turn tomorrow. ‘The match between the two aviators [Farman and Delagrange] is only beginning.’
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23 March, p.5.
The town council of Issy-les-Moulineaux has voted on a motion of the mayor to send ‘most lively congratulations’ to Farman and Delagrange for their flying successes at Issy.
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25 March, p.1.
The contest between Farman and Delagrange now draws crowds to Issy. On the 23rd a thousand were present. Yesterday morning Delagrange flew for 3 minutes 30 seconds, covering about 3.2 kilometres [obviously turning well now], but short of Farman’s 3 minutes 47 seconds. The whole problem of flight now lies in the motors, especially in cooling them. Both Farman and Delagrange are using water-cooled motors; the need to refill the water tank has often ended flights.
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27 March, p.5.
There was a slight accident with Delagrange’s aircraft on 25 March. The old water tank was replaced – ‘replacing the system of vaporized water’. Then the mechanics ran the engine for several minutes. The test seemed conclusive. But suddenly, the motor shaft broke at its forward end, to which the propeller is bolted. The two propeller blades were thrown into the air and cut one of the cross members that connect the central [wing] cell to the rear [tailplane] cell; but did only minor damage to the wing covering [‘voilure’]. Repairs will probably be finished by the beginning of next week.
[Has Delagrange, like Farman, replaced the evaporative cooling system with a radiator?]
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L’Aérophile, 1 April 1908, pp. 129-131, ‘Les étapes de l’aviation. À l’assaut des Records et de la Coupe Archdeacon. Delagrange contre Farman’

On 14 March, two aircraft flew at Issy successfully: the Henri-Farman 1bis and the Delagrange 2. On the Farman, the old varnished silk of the covering has been replaced by ‘Continental’ rubberized fabric. This has an absolutely smooth surface, reducing air friction, and complete impermeability. ‘Continental’ fabrics are used to cover current large dirigibles. It is quite possible that the material will become the common covering of aeroplanes, giving a new market to the famous rubber company.

14 March also saw the start of trials of the new aviation motor ‘Renault frères’. The Farman aircraft flies marvelously with the new motor. Farman made five flights of 500-600 metres, with a turn included.

On the same day at Issy, Delagrange – who had in March 1907 shaken up the torpor of aviators (lulled by the successes of Santos-Dumont) – found rewards for his long sacrifices. In his No. 2 aeroplane (exactly the same as the Farman 1 that took the Grand Prix in January 1908), and equipped with an Antoinette 50 hp, 8 cylinder motor, he made a flight of 300 metres in 19 seconds, and was stopped only by the limits of the Issy field.

Witnesses of these flights were the Voisin brothers, Ernest Archdeacon, and General Kovanko (commander of the Russian military balloonists, in France on an official mission to study aeronautical progress).

16 March   Between 9 and 11 a.m. on this day Delagrange made five flights of 500-600 metres, limited only by the edges of the field. Observing were Ernest Archdeacon, Louis Blériot, Henry Kapferer, Chares and Gabriel Voisin, Captain Ferber, C.-A. Bertrand (a reporter from Sports and l’Intransigeant). The stability of the aircraft was such that Delagrange was able to take his hands off the controls and wave to his friends in passing.

17 March   Delagrange tried for one of the three prizes offered by the Commission d’aviation of the AéroClub de France for 200 metres (an enamel plaque and 20 francs).

p. 130   He made this attempt between 5 and 6 p.m., with François Peyrey and Henry Kapferer observing for the Commission d’aviation. He succeeded at the first attempt, with a flight of 269.2 metres at a height of 2 metres. At the start line the aircraft must be airborne; so the distance flown is actually greater than 200 metres. The flight took 21.2 seconds. It would have been longer if a group of cavalry had not been in the way.

20 March   Delagrange is now the rival of Farman, though no official match exists. On this day Delagrange flew a loop of 700 metres. At about 5 p.m. Farman flew several times, now with an Antoinette motor (replacing the Renault).

21 March   A misty day, but that did not dissuade aviators at Issy. Farman flew 2 ½ oval circuits (the length of the oval, between posts, being 500 metres). On each turn the aircraft banked inwards, but rose – and then came down again once the turn was completed.

p. 131   The Commission d’aviation, calculating by the distance between the posts (501.2 metres), recognized that Farman had flown 2,004.8 metres, in 3 minutes 31 seconds. Distance and time are records. Farman in fact probably flew 4 kilometres, if the space needed for turning is counted.

Around 12.30 p.m. Delagrange started to fly, around the same posts. He travelled 1,500 metres, in 2 minutes 3 seconds, before having to land because cavalry horses were in his way.

Delagrange has shown interest in a ‘Syndicat d’aviation’ which has engaged the Voisin brothers to produced six machines of the same type of the Farman 1bis and the Delagrange 2. He is impressed by the ease of manoeuvre and safety of the machine. Recent advances in aviation should be recognized. In 3-6 months kilometres have come to be flown on demand, turns are accomplished, and serial building of aircraft is starting. Progress is quicker than expected.

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11 April, p.5.
Delagrange yesterday flew 2 ½ minutes. He will do official trials today.
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Scientific American, 11 April 1908
Delagrange’s aircraft is ‘practically a duplicate’ of Farman’s. On 21 March Delagrange made ‘several extended flights’ around the ‘borders of the parade ground’ [at Issy, presumably]. The longest was for 2 minutes 5 seconds, and included a complete circle [Delagrange’s first].
On 17 March Delagrange competed for a 200 franc prize for a straight flight of 200 metres. He covered 269 ½ metres at 28.44 mph (flying for 21 1/5 seconds).
‘These performances of the sculptor show that the type of machine which he originated [??  - he was the Voisins’ first customer for it] and which was copied and modified by Farman, is capable of being flown by anyone of ordinary intelligence who will sufficiently practice the art’. [Farman did not copy Delagrange’s machine. The Voisin brothers built for Farman the same machine – doubtless with some minor modifications – as they had built for Delagrange. Farman certainly modified that aircraft in the fall of 1907.]
A duplicate of the Delagrange-Farman machine can be bought in the USA for US$9,000. A Russian general has ordered one for his government.
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L’Aérophile, 15 April 1908, p.?, Georges Bans, ‘Portraits d’Aviateurs contemporains. Léon Delagrange’
Delagrange was born in Orléans in 1873. His early years were spent with his father, a big industrialist in spinning and weaving in Orléans. He there became interested in mechanics. In his youth he practiced many sports. He was a student at the École des Beaux-Arts, of sculpture, almost at the same time as Henri Farman was there learning painting and Gabriel Voisin there studied architecture. From the age of fourteen Delagrange exhibited at the Salon de la Société des Artistes Français, obtaining several medals. He is remembered for the Page florentin, Templier, Amour et Jeunesse in the Copenhagen museum.
He was drawn to aviation in 1905 when he observed the experiments of Ernest Archdeacon on the Seine, at Billancourt. His first aircraft was built by the Voisin brothers. The aircraft was demonstrated to him in 1907. Only recently did he start to fly his second machine. His first flight was on Saturday, 14 March, at Issy. Delagrange has also flown recently over Paris in the dirigible Ville-de-Paris, piloted by Henry Kapferer.
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L’AérophileI, 15 April 1908, pp. 147-148. L. Lagrange, ‘Les étapes de l’aviation. Delagrange conquiert les Records et la Coupe Archdeacon’
The competition between Delagrange and Farman for the longest flight has revived on the first fine day after a period of bad weather.
Delagrange had added an additional, 5 litre,  water tank to his machine; he can now carry 20 litres. This enables the motor to run for 18 minutes without overheating. To win the Prix Armengaud jeune prize a time of 15 minutes in the air is needed.
On 10 April Delagrange restarted trials under the supervision of Captain Ferber, François Peyrey, and Paul Tissandier (representing the Aviation commission of the AéroClub de France). Delagrange immediately flew a circuit of 2,500 metres – and would have beaten Farman’s record (set on 21 March, of 2,004 metres) if a wheel had not touched the ground. Spectators were struck by Delagrange’s mastery of the aircraft, its ease of flight, its manoeuvrability, and the precision of Delagrange’s turns. He has spent little time in the air since January; but it has been enough to make him a skilled pilot. He surely took longer to learn to ride and turn a bicycle.
The next day, 11 April, Delagrange flew for 9 minutes 15 seconds without touching the ground. He became the third holder of the Archdeacon cup. The first trials were made in the morning, supervised by Robert Esnault-Pelterie, Henry Kapferer, and François Peyrey, representing the aviation commission of the AéroClub de France. A four sided course had been laid out, with sides of 400, 200, 300, and 300 metres. Trials began around 11 a.m.
p. 148   There was a fresh, irregular, and gusty wind. Flying resumed at 5.30 p.m., in a lighter wind. The track was now marked with sides of 350, 200, and 275 metres – a triangle of 825 metres. For two circuits the aircraft was low to the ground, and touched during the slight drops that occur on exiting a turn. The Delagrange went to three metres, and flew five circuits without touching the ground. The commissioners calculated that he had flown 3,925 metres without ground contact, in 6 minutes 30 seconds. Including the first two circuits, the flight had covered 5,575 metres – although, if the turning space is taken into account, the flight was much longer.
Thus Delagrange has taken from Farman the record for distance, at 3,925 metres, in 6 minutes 30 seconds. He stopped only because his fuel supply was only for ten minutes. Delagrange is ‘truly a man and a sportsman – an artist who came down from the ivory tower last year to enter a full scientific and industrial battle, and to achieve triumph in a few months’.




From the first good days of 1908 Delagrange has trained daily at Issy, with the aim of beating the records set by Farman. On Saturday 11 April 1908, with the Aviation commission of the AéroClub present, he made a flight of 6 minutes 30 seconds, covering 3,925 metres. Delagrange thus doubled Farman’s maximum distance and stopped only for lack of fuel.
Delagrange, as sculptor, wishes only to make a bust of Farman; as an aviator, he wishes to train many pupils who will achieve the victory of the new French sport [of flying]


Scientific American, 25 April 1908
p. 291 ‘Delagrange’s record aeroplane flight’   On 11 April 1908, Delagrange is ‘said to’ have flown a circular flight of 4 ½ miles at Issy-les-Moulineaux. Over a triangular course he touched down twice on his first two circuits, but then flew 3 miles in 6 ½ minutes without touching the ground. The total time was 9 ¼ minutes. The flight supposedly ended because Delagrange grew tired of operating ‘so continuously’ the horizontal rudder [pushing and pulling on the control wheel that moved the front elevator of the aircraft]. Working this control is a ‘rather arduous task’ and a ‘great strain on the nerves of the operator’. The flight did not end because of engine overheating, as Farman’s have done. Delagrange had fitted a radiator and pump for the proper cooling of water. The need is clearly for a better automatic horizontal stabilizer on the aircraft.
[A fuller description of this flight is in Scientific  American, 9 May 1908, p. 336.]
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12 April, p.1.
Every day there is new progress by ‘flying men’ [‘hommes volants’]. Three weeks ago Farman set a new record of 2 kilometres 4.8 metres. Delagrange has now [11 April] raised this to 3 kilometres 925 metres, in a light breeze at Issy at 5.30 p.m. These AéroClub commissioners were present: H. Kapferer, R. Esnault-Pelterie, François Peyrey, and Desmanets. The course was triangle with legs of 350, 275, and 200 metres. Delagrange is at times nervous, but has ‘all audacity’ [‘toutes les audaces’]. He tries to stay two metres from the ground, but attempts turns that inspire fear. He made a quick take off, turned close to the Porte de Grenelle, passed the well, but touched the ground while passing close to the hangars. On the second turn, a wheel touched the ground. After that he rose to 3-4 metres, and did not touch again. The aircraft made four circuits quite happily, at about 50 kph.
Delagrange almost completed a fifth circuit, but cut his ignition and came down, saying that he was exhausted. To stay a suitable distance from the ground ‘I had constantly to move the elevator. I can no longer feel my arms.’ He was overjoyed when given the distance he had flown: 3,925 metres. “I have had Farman!’, he said to us. ‘I’ve got him.’ The time length of the flight was 9 minutes 15 seconds, of which 6 minutes 30 seconds were after he touched the ground.   It is almost certain that Delagrange flew more than 4 miles. The speed of the aircraft was 50 kph. Delagrange has been training only 1 ½ months [not so – his regular flying started in November 1907]. Therefore his performance is remarkable. The contest between Farman and Delagrange has started and will continue.
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15 April, p.5.
Delagrange did not attempt a 15 minute flight yesterday. Even if he had wanted to, the expectant crowd in front of his hangar would have prevented him from flying.
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17 April, p.5.
Aviators are unhappy, because the AéroClub de France has proposed there should be a fee of 50 francs for those wanting to compete for the Armengaud prize (for a 15 minute flight) – to be reimbursed only if the prize is won. Delagrange says: ‘I am not God the Father … I do not command the winds or the rain’. He understands that the charge should not be paid back if there is a failure [‘échec’] [to fly for 15 minutes, presumably]. But if rain or wind prevent flying he does not think that the AéroClub can oblige payment, especially because the ‘fees for stewards [‘service d’ordre’] fall on me alone.’
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19 April, p.6.
The wind continues. Delagrange did emerge yesterday. He has improved the cooling system of his motor with a 20 litre tank of water that vaporizes as the motor runs. He hopes that this will give him the 15 minutes in the air needed for the Armengaud prize. After his 9 ½ minute flight last week, he had 9.5 litres in his water tank.
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3 May, p.1.
‘Delagrange s’envole, heurte une auto, tombe et démolit son aéroplane.’
Yesterday at Issy Farman and Delagrange both tried for the Armengaud prize; neither succeeded. Delagrange crashed because of the ignorance of the public and the lack of stewards. His machine was destroyed. There were several thousand spectators. Only two municipal guards, along with two gendarmes and 3-4 agents [of what?], were present to keep people off the field.
A gusting wind made flying start late. Delagrange went first, but stopped to adjust his motor. Farman then flew, but withdrew at 6.45 [p.m.], disturbed by spectators. Shortly before 7 p.m. Delagrange left his hangar and decided to fly, since the weather was now calmer. He flew some distance, then turned, but then his motor lost power – and in trying to avoid spectators he hit a taxi-auto parked for some reason on the field, and rolled into a ditch on the hangar side of the field. The damage was heavy, though Delagrange was not hurt.
Le Matin comments:  Issy is now too small for large experiments. It was good at the beginning. If flyers cannot get effective control of the ground, or a military presence to keep the field clear, they should go elsewhere.
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5 May, p.5.
Delagrange will leave next week for Rome, where he will perform flying experiments. His aircraft will be repaired from the accident [of 2 May] in a few days. He will be gone about a month, stopping at Florence and Turin on the way back. He will not continue flying at Issy. He and several friends are seeking another place to fly in the environs of Paris. Such a place is not easy to find.
Farman also plans to stop flying at Issy. At the speed his aircraft now flies (75-80 kph) he cannot turn without extreme risk in less than 200 metres.
Le Matin comments: Aircraft now indisputably turn. Future research for the advance of heavier than air flight must also include stability in wind, engines, and trials at height. Flyers must have a large, flat space. Turning an aircraft at Issy is now comparable in danger to driving a car around the Place de la Concorde in fourth gear without brakes.
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17 May, p.5.
Delagrange is now in Turin. Then he will go to Rome, where Gabriel Voisin will join him.
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Lucien Marchis et al, Vingt-cinq ans d’Aéronautique française, 2 vols., Chambre Syndicale des Industries Aéronautiques, Paris 1934.
20/27 May
Delagrange flew 7, then 12, kilometres in Rome.
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27 May, p.5.
[list of aeroplanes now flying, or soon to do so, belonging to sixteen Parisians]  Delagrange is now in Rome.
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31 May, p.1.
‘Victoire du Génie français. Delagrange à Rome a fait 16 kilomètres en aéroplane. Archdeacon et Farman à Gand ont fait de l’aéroplane à deux.’ [Victory of French genius. In Rome Delagrange has flown 16 kilometres in his aeroplane. Archdeacon and Farman have flown together in an aircraft at Ghent]
Last Thursday Delagrange ‘on his aerial ski’ [‘sur son esqui aérien’] stayed in the air for nine minutes. Yesterday (according to this telegram to Le Matin) he took a new world record, flying for 15 minutes 25 seconds at 5.45 a.m., traveling, around posts, 12 kilometres 700 metres. Present were Major Morris, de Filippi, Ricaldoni, Ranza, Gabriel Voisin (‘inventor of the aeroplane’), Bishop (president of the Aero Club of America), and the Italian press. He flew at 3-5 metres in a light breeze.
[Le Matin says that the actual distance flown, including turns, was 16 kilometres.]
Delagrange does not get the prize for a 15 minute flight [the Armengaud prize], because the flight was not in France, and was not witnessed by the AéroClub de France.
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Scientific American, 4 July 1908
p. 13  On 22 June 1908 Delagrange circled nine times around the Piazza d’Armi of Milan, in 16 ½ minutes. His speed for the 9 ½ miles flown was 34 ½ mph. On 23 June Delagrange flew for 18 minutes, though touching the ground lightly on one circuit. After more flights in Turin ‘ it is expected that he will visit America’.
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4 September, p.2.
Delagrange yesterday morning resumed training at Issy. The aircraft has been completely reconditioned [‘remis’] by the Voisin brothers. They have added four vertical surfaces between the wings: two at the tips, two near the centre of the wings.  The aircraft has a new radiator, which Delagrange hopes will allow a flight of one hour, a new record.
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L’Aérophile, 15 September 1908, pp. 357-8, ‘Magnifiques performances de Delagrange’
The Issy field had scarcely been returned to fliers when training resumed. Delagrange achieved remarkable performances. The Voisin brothers have modified his aircraft. It now has four vertical panels in the wings: one at each tip, and one inboard of the tip on each side. Thus the wing has three large cells. These changes were made in accordance with ‘delicate laboratory experiments’ by the  Voisins. All aviation records belong to Voisin aircraft. [None to the Wrights? Wilbur is by this time flying in France.]
Delagrange’s machine also has a new motor, an Antoinette making 50-60 hp in place of the 40-50 hp of the previous model.
Trials were resumed at Issy on 3 September, in the early morning. Delagrange, using his modified aircraft, made flights of 1,000-1,500 metres.
On 5 September, at 6 a.m., Delagrange made four large circuits around the field, followed by two smaller ones. During the latter he flew over the Ferber 9. Timed by MM. Blériot and André Fournier, this flight lasted 9 minutes 40 seconds, covering roughly 10 kilometres. The flight was ended by fuel exhaustion, the tank holding only 8 litres.
On 6 September, Delagrange beat all records, flying for almost a half hour, making 15 rectangular circuits around the field (and thus 60 turns). Present were Captain Ferber, Louis Blériot, A. Goupy, R. Gasnier [sic], André Fournier (representing the aviation commission of the Aéroclub de France), Gabriel and Charles Voisin,
p. 358   Levavasseur and Gastambide (of the Société Antoinette), the viscount de la Brosse, the Italian naval officer Calderara, L. de Brouckère (the well-known Belgian aeronaut), etc.
Pennants marked the corners of the rectangle around which Delagrange flew. He had decided on their placement.
At about 7.30 a.m., after checking his motor (running perfectly), Delagrange started. He flew at 6 metres height, very stably. In 15 minutes he had already made 8 circuits. Delagrange saluted spectators as he passed. After the fourteenth circuit the aircraft descended. Fuel was almost gone. But only after the south turn on the fifteenth circuit did landing take places. Fuel was exhausted. The measured flight time was 29 minutes 53 3/5 seconds. The distance covered was 24.125 kilometres; though if turns are taken into account the distance was some 30 kilometres. Speed was some 60 kph.
All aviation records for distance and time flown were beaten by this flight.
On 7 September Delagrange flew for 28 minutes 1.2 seconds, ending the flight with an easy landing, as always. There was no course marked, and the distance could not be exactly measured. Present were Captain Ferber, A. Goupy, François Peyrey, Gabriel and Charles Voisin, René Quinton (founder of the Ligue Aérienne Française), Bunau-Varilla, etc.
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7 September, p.1.
Delagrange set a new record yesterday at Issy, flying for 29 minutes 53.8 seconds (15 ½ laps). The times flown by aviators are:  Delagrange, 29 minutes 53.8 seconds; Henry Farman (6 July), 20 minutes 20 seconds; Wilbur Wright (5 September), 19 minutes 48 seconds; Louis Blériot (6 July), 8 minutes, 40 seconds.  Delagrange’s flight ended because the motor stopped. There is some suggestion of lack of fuel. Delagrange will fit a 35 litre fuel tank for another attempt on the record.
There is a reference here to Delagrange’s mechanic, Harel.
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18 September, p.2.
Yesterday Delagrange gave a lesson to Mme. Thérèse Peltier, her first lesson in flying an aeroplane. There was no flight; the aircraft rolled on the ground while Delagrange explained the controls. This first airwoman [‘aviatrice’] will continue lessons in two weeks, when Delagrange is installed at Savigny-sur-Orge.
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25 December, p.2.
The first Salon d’Aéronautique opened on 24 December 1908 at the Grand Palais. Delagrange’s Voisin biplane was displayed, along with many other aircraft. [The show continued until 30 December.]
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1909
8 January, p.6.
The committee of the AéroClub de France voted yesterday to give pilots’ licences [‘brevets’] to Henry Farman, Delagrange, Blériot, R. Esnault-Pelterie, Wilbur and Orville Wright, Captain Ferber, and Santos-Dumont – eight licences in all.
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4 April, p.1.
The especially wet winter has interrupted aviation activities.  Only Wilbur Wright, in the pays Béarnais (at Pau) has been able to continue flying.
Delagrange, ‘struck by a cruel bereavement’, has not flown. But his aircraft, without motor, was recently blessed at Juvisy by the Archbishop of Paris.
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There are no other mentions in Le Matin of Delagrange before the August 1909 meeting at Bétheny, outside Reims.
Delagrange took part in the Bétheny meeting, flying a Blériot 11. He won no prizes.  On 4 January 1910, again flying the Blériot II, he was killed in a crash near Bordeaux. The aircraft was fitted with a 50 hp motor (twice the horsepower that Blériot had used to cross the Channel in the same aircraft), and the day was gusty. Delagrange seems to have turned too hard (for the load bearing capacity of the wing) into the wind. A wing folded up and the machine crashed. He was crushed.
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Delagrange is an odd character. He has not Farman’s dogged persistence and caution, nor Blériot’s willingness to try something new, whatever the risk. After getting his plane from the Voisin brothers in the spring of 1907, he seems barely to have attempted any flying before the fall of that year. Farman passed him in experience and accomplishment before he started. In the spring of 1908, however, he made rapid progress, and a rivalry over flight times and distances developed between him and Farman. He then, in the early summer of 1908, went to Italy, where he made some impressive flights. After then – at least to judge by reports (or lack of reports) in Le Matin – he flew less. He had no particular success at the Bétheny meeting in August 1909, though at a meeting in Doncaster (England) in October 1909 he had notable accomplishments. He died in January 1910 as a result of a crash of his Blériot 11 near Bordeaux.