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Aviation History
1947
1947 - 1792.PDF
442 Primary gliders under repair in th, t. factory at Cognac. At the time of » "*Tiger Moth* from the military Sfi*^ near by were being overhaul^ The first Arsenal 24H tandem (aggregate 8.000 h.p.) is due to run S£ 1200 transatlantic flying boat to Mend tomtom, the Verniwe system is epld in, A View of Franca—Part II bered from last year's Salon. Manufacture of parts for the first 24H began in July, 1945, and five and a half months later the first engine ran. Many examples have since been built, and hundreds of hours of testing have been completed at Strasbourg and Gatines. The first 24H tandem combina- tion should run at the beginning of next year. That the day of the large piston engine is not yet over has become glaringly apparent during recent months, and the following data are quoted for the 2411 as an engine which may yet make a name for itself in civil and mili- tary installations: sea-level power, 4,000 h.p. at 3,250 r.p.m.; altitude power, 3,500 h.p. at 3,250 r.p.m. at 23,000ft; capacity, 70 litres; bare weight, 4,080 1b. The 8,000 h.p. tandem 24H, with its shafting, weighs 9,150 lb. One understood that the tandem 24H was intended for installation in a military bomber-reconnaissance machine, part of the mock-up of which one observed in the shops. This type will now have two 24ns and two Nenes mounted, one of each, in two nacelles. Another mock-up was of the Nene-powered V.G.oo strike aircraft. The Tandem-engined V.B.10 The Chatillon works is not equipped for series produc-tion and is concerned only with prototypes. In one shop we saw two examples of the tandem-en gined V.B.io, origin-ally conceived as a fighter-attack machine, but now in pro- duction at the Meaulte works of S.N.C.A.N. as a photo-graphic reconnaissance type. The six machine guns and provision for bombs have been dispensed with in favourof extra tankage, but the four 20 mm cannon are retained. Fifty are on order. This type will also be rememberedfrom the Salon, but one feature which was not apparent there, is the unusually massive undercarriage, with a travelof over 21 Jin. This was specified by the French Air Minis- Though its sea-level output is 4,000 h.p., the Arsenal 24H engine, soonxo be air-tested in an S.E. 161 (Languedoc), is notably compact. Essential moving parts are taken from the Jumo 213..* try after experience with American and British landing gears which, in general, are considered too weak. The latest performance figures for the V.B.io, developed under the direction of M. Badie, are: maximum speed, 435 m.p.h. at 26,250ft.; range, 1,675 miles. A two-seat version, with the second man behind the rear engine, is being considered. The next item to attract us was rig for boundary-layer suction tests, with a Renault engine driving a compressor to suck air from a slot on the upper leading edge of the camber-changing flap of a sharply swept wing. The sys- tem was on test prior to trials in the Chalais-Meudon tunnel and provided an excellent example of the kind of work to which Professor Rebuffet had referred. Continuing, we came upon a special Emoucbet glider with controls arranged for a prone pilot's position, which Arsenal are studying, and, near by, a series of small, pilot- less experimental gliders for research into stability at moderate speeds, radio control and blind landing. Two have already been launched from a LeC>45. Each glider has a transmitting set, and the flight path is tracked from the ground. To obtain the requisite loading id a
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