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Aviation History
1926
1926 - 0875.PDF
DECEMBER 2, 1926 PAR S AERO SHO In the following pages of this week's issue of FLIGHT will be found particulars and illustrations of practically all the aircraft to be exhibited, at the Paris Aero Show which opens at the Grand Palais, Champs Elvsees, to-morrow, December 3. This advance report deals, in so far as it has been possible to obtain the necessary material, mainly with the general characteristics of the machines exhibited, the purpose for which they were designed, the engines with which they are fitted, the main dimensions of the machines, and their performances. No attempt has been made to give very detailed descriptions of constructional features, as it is intended to return to these in subsequent issues. In the meantime the following notes and illustrations should serve as a very useful guide to those visiting the Paris Aero Show, as well as giving a fairly complete indication to those not able to visit the Salon of the general trend of European aircraft development as represented by the machines on view in the Grand Palais. ARMSTRONG-WHITWORTH THE British firm of Armstrong-Whitworth is so well known throughout the world that there is no necessity here to mention its various products. Sir W. G. Armstrong-Whit- worth Aircraft, Ltd, is a branch of the parent company and devotes its energies exclusively to aircraft construction, while its allied company, Armstrong- Siddelev Motors, Ltd., produces the famous aero engines " Jaguar," "" Lynx," " Mongoose," and " Genet." At the Paris Aero Show particular interest will attach to the Armstrong-Whitworth exhibits, since this is the only British firm to show aircraft. In addition to the aeroplane to be exhibited, the Armstrong-Siddeley firm will exhibit their complete series of engines, of which the " Mongoose " is an entirely new type and will make its public appearance for the first time at Paris. Having placed on record the fact that the Siddeley aero engines will be on view, we must defer a more detailed reference until next week, the present issue of P'LIGHT being devoted exclusively, as far as the Paris Aero Show is concerned, to aircraft. The aeroplane to be exhibited on the Armstrong-Whitworth stand is the " Ajax," a two-seater general-purpose aeroplane, fitted with the Armstrong-Siddeley " Jaguar " engine. This machine, which can be used either as a general purpose reconnaissance machine or as a two-seater fighter, may be said to be the two-seater development of the " Siskin " family with which our readers are already familiar. It is character- ised by a very compact form and an excellent speed range, as well as by good controllability at all speeds. The normal load of the machine is 400 kgs., and fuel for a range of 800 kms. at cruising speed. This may be increased by 120 kgs. for special purposes. The top speed of the " Ajax " is 225 km./li. and the ceiling with normal load is 6,000 metres. The engine normally fitted is the Armstrong-Siddeley " Jaguar " of 385 h.p. If a higher performance is required, or particularly a higher ceiling, the supercharged engine of the same type may be used. The " Jaguar" engine is entirely accessible. Inspection and running adjustments are easily made. A fireproof bulkhead is fitted behind the engine. Petrol and oil filters of ample size are provided in accessiblt- positions. The petrol is fed from a gravity tank divided into two compartments, mounted inside the fuselage. Reference has already been made to the good controllability, which extends right down to, or beyond, the stalling angle, and the machine can be flown indefinitely without the use of controls, being very stable as well as manoeuvrable. The undercarriage is of the type in which the shock of alighting is taken by an oil buffer so as to relieve the frame of o o o o o o o The Armstrong- Whitworth "Ajax" : A two- seater genera] purpose aero- plane with " Jaguar " en- gine. Can be fitted with float undercarriage. O O O O O O O O O O O O O O O O O o o o o 775
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