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Aviation History
1912
1912 - 0043.PDF
FIEUX CQ2 MOTORS FOR AVIATION MODELS. THIS .ingenious and well-made engine is a move in the right direction to popularise model aeroplaning, if in ordinary practice the little motor proves as reliable as it gives promise of being. I?-The construction is in miniature, and very similar to that of the famous Gnome petrol engines, the arrangement of the connecting rods being identical. Of course, this model shaft, and D is the exhaust, which is connected to ports at the gas- cylinder end of the valve-casing. Messrs. G. N. Edward and Co., 01 18, Berners Street, Oxford Street, W., who are the English agents for this engine in Great Britain, also supply a 2-cyUnder and a 5-cylinder engine, the principle of which is precisely similar. The latter model is claimed to give off about I •io-h.p. at 1,350 r.p.h. Enlarged view of the Fieux CO2 rotary engine, showing the interior of the crank-case. works on the two-stroke principle, which ensures there being a very even torque, even with the 2-cylinder model. The illustrations make the construction clear, so it will suffice to say that the crank-case and ?chamber, A, are of aluminium, and the cylinders of bronze. About the only part of the machine that requires a detailed description is the deviee for regulating the pressure between the con tainer and the engine cylinders. Carbon dioxide gas is contained tat a pressure of about 7 atmospheres in the little sparkletlcylinder shown at the bottom of the full-length picture. When this cylinder is screwed home into the end of chamber, A, the gas is liberated by.the end of the container being thrust in by1 the pin situated in the middle of the threaded portion. - When this gas reaches, O, under pressure, it tends to drive the part, N, outwards against the pressure of the springs, R, on either side. It will be clear that when this action takes place the central pin -will no longer hold open the orifice of the cylinder, so that the supply of gas will be cut off until sufficient has been used from, A, to allow the springs to bring back N, to its normal position. Thus the pressure is kept constant, and can be regulated by the tension of the springs. In the section of the distribution valve-gear, L, is the inlet pipe, which is connected to^ the gas supply by the hollow crank- View of the Fleux engine for model aeroplanes, showing gas cylinder and propeller complete. Sectional drawing of the Fieux engine, with diagram of the distributor valves on the right. 43
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