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Aviation History
1924
1924 - 0332.PDF
MAY 29, 1924 1200 13t>q 1+O0 1500 REVS. PER MIN REVS. UOO l+OO tSOO IftOO 1700 THE ARMSTRONG-SIDDELEY AERO ENGINES : On" the left a running chart of the 360 h.p. " Jaguar," and on the right power curves, etc., of the 175 h.p. "Lynx." The 175 h.p. Armstrong-Siddeley "Lynx." 0-55 pint (0-312 litre) per b.h.p. per hour, and the oil consumption 0-03 pint (0-017 litre) per b.h.p. per hour. The overall diameter of the " Lynx " is 43 ins. (1,090 mm.). WM. BEARDMORE AND CO., LTD. BEFORE the War the famous firm of Beardmoretookup aero engine work by obtaining the agency for the Austro-Daimler aero engines of 120 h.p. During the War the original engine was greatly improved upon, and a slightly larger and more powerful type, the 160 h.p. engine, was developed. Then followed a period during which the public heard but little of what was being done by the Beardmore aero engine depart ment. The firm was not idle, however, and Mr. Alan Chorlton, chief of the aero engine department, was looking ahead, instead of to the present or the immediate future. He became convinced that the Diesel, or semi-Diesel, type of engine might be a possible aircraft engine, and the result was that Beardmores commenced a series of experiments, first with single-cylinder units and later with a complete six- cylinder engine. The greatest secrecy has been maintained concerning the work on the application of the semi-Diesel principle to aero engines. The question of weight was naturally a serious one, but already Beardmores have ad vanced so far that it is possible to state that an engine can be built which is not prohibitively heavy. Details are not avail able, but the accompanying photograph, the first to be published in FLIGHT, shows the " Typhoon " aero engine. The advantages which may be expected from an engine working on the Diesel or semi-Diesel principle may be briefly summed up as follows : Greater reliability, better fuel economy, and the possibility of employing a fuel considerablv cheaper than petrol. It also appears likely that the risk of fire should be smaller by employing a fuel with much higher flash point, so that, altogether, the development of a semi- Diesel aero engine may well have the most far-reaching effects upon the future of commercial aviation. Beardmores are to be congratulated upon being the first British firm to undertake the development of an engine of this type. The Beardmore " Typhoon Engine. Semi-Diesel Aero 332
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