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Aviation History
1924
1924 - 0742.PDF
NOVEMBER 27, 1924 THE MARTINSYDE A.D.C I SINGLE-SEATER FIGHTER 380 H.P. Armstrong-Sidcleley "Jaguar" Engine SOME months ago, it may be remembered, we announced that the stores, stocks, and goodwill of the Martinsyde Co., of Woking, had been taken over by the Aircraft Disposal Co., and that, in consequence, it might be expected that when the firm made a start with original designs, these would follow somewhat on the lines of the famous Martinsyde machines, or that, at any rate, the " Tinsides " would form a basis on which to commence to develop Aircraft Disposal Co. types. Some time ago the services of Mr. John Ken- worthy, as chief designer, were secured by the A.D.C., and the first result of this collaboration has now materialised miles per hour, and the average climb to 10,000 ft. accom plished in about 4 m. 50 s., it will be realised that the per formance bears out the impression given by the lines of the machine. It might be added that these figures are not necessarily final, as some testing and experimenting with various propellers is still to be carried out, but even as they stand the figures are extremely good. We have no figures relating to the landing speed, but the impression gained while watching the machine flying is that the landing speed is very low. Mr. Kenworthy informs us that according to performance estimates the machine should land at some- THE MARTINSYDE A.D.C. I : Front view. The engine is an Armstrong-Siddeley " Jaguar. in the form of a single-seater fighter with Armstrong-Siddeley Jaguar " engine. The new machine will be known as the Martinsyde A.D.C. I, and, although its initial tests have not yet been completed, there is justification for stating that the performance is extremely good and that the " Disposalsyde," as a wag has nicknamed it, would be a very useful addition to the fighting equipment of any country. True to the original intentions of the Aircraft Disposal Co., the Martinsvde A.D.C. I has retained some of the features what less than 50 miles per hour, so that a speed range of 50 to 160 miles per hour must be regarded as distinctly good. The general lines and lay-out of the Martinsyde A.D.C. I will be clear from the accompanying photographs and scale drawings. The machine is a normal staggered tractor biplane, with the pilot's cockpit so placed in relation to the wings as to give a good view in all directions. The fuselage is, as regards its rear portion, a spruce girder braced by tie-rods, 4 * 1 m ^•.ijBP'v «^A> iki- V ' liito*. "" SHfefgg V *$ t i 10- ~V| '"^.:'--:-- • A 'WltBKMM 1 w "*$$: m THE MARTINSYDE A.D.C. I: Three-quarter rear view. <oI the familiar Martinsyde F.4. Thus, the rear portion of the fuselage is identical with that of the F.4, and the same applies to the main planes. At present the undercarriage is also of normal type, but it is likely that on subsequent machines this may be replaced by an oleo undercarriage, The whole front portion of the fuselage has been re-designed, not only on account of the installation of a different engine, but also for reasons connected with petrol tank position, machine-gun installation, etc. The result has certainly been the produc tion of an extremely business-like looking machine, and when we state that the top speed is already somewhat over 160 while the front portion has ply-wood covered sides. The pilot's " office " is provided with a particularly complete set of instruments, and the two Vickers' machine-guns are con veniently placed, and are, needless to say, fitted with Con- stantinesco gun gear. Two sliding doors in the deck fairing, ahead of the wind-screen, give access to the gun mechanism, as indicated in a sketch, and the high deck fairing with its straight +umble-home sides affords ample room for mounting the guns without crowding. Steel guards are fitted between the guns and the top of the petrol tank. A particularly neat mounting has been designed for the 742
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