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Aviation History
1913
1913 - 0223.PDF
FEBRUARY 22, 1913. " Flight" Copyright. The 70-h.p. Mercedes engine. oil-pump and magneto are driven by one vertical shaft, an arrange ment which offers very little wind resistance. On the larger models two magnetos are fitted. Lubrication is by forced feed, the oil tank " Flight The 150-h.p. N.A.G. motor. being contained in the base chamber of the motor. The supply or oil is sufficient for a non-stop run of six hours, which, by the way, is guaranteed with all Mercedes aeroplane engines. All the working l/50Hf] "Flight The 100-h.p. Renault motor. i ui.yriphi parts of the motors are arranged on one side, this being very con venient for the making of any adjustments which may be necessary. N.A.G. The British N.A.G. Motor Co., Ltd., 4, Great Marlborough Street, W., show two of their motors, a 4-cyl. engine of 55-h.p. and a six-cylinder one of 150-h.p. The separate cylinders are machined inside and out and fitted witli sheet metal water-jackets. The inlet and exhaust valves are in the cylinder heads and the rocking levers which operate them are worked by push rods. A heating device is fitted to the automatic carburettor. In the larger engine, two H.T. magnetos are lilted on a transverse shaft behind the engine. A decompression lever is arranged for moving the cams on the camshaft, so that the engine may be eaiily started. A device is also fitted by which the exhaust valves can be held open, should it be desired, to stop the engine quickly. A special thrust beating is arranged in the cxankcue, which is a one-piece casting, thus making it very rigid. The lubrication is forced, a gear wheel pump drawing the oil from the tank which is fitted below the crankcase. RENAULT. Three types of Renault motors are shown by Messrs. Renault, Ltd., of Seagrave Road, West Brompton. Two have eight cylinders and the other twelve cylinders, in each case arranged V (union, the former at an angle of 90 degrees and the latter at 60 degrees. The cylinders are air-cooled, and are covered with a bonnet into which cool air is forced by a centrifugal fan. The valves are superimposed and all worked from one camshaft; the inlet valves direct and the exhaust valves by a rocking arm. SALMSON. This exhibit comprises two very distinct types of motor, both, however, designed on the Canton-Unne system. In one type the cylinders are ranged radially round the crankcasc ; examples are on view of the 7-cyl. 85-h.p. and the 9-cyl. iio-h.p., one of the latter with the cylinders arranged horitontally, the propeller-shaft being driven by bevel gearing. These engines are fitted with a starting- " Flight" Copyright. THE SALMSON (CANTON-UNNE*) MOTORS.—On the left the 110-h.p. engine placed horizontally, in the centre the 120-h o 9-cvl engine, and on the right the special motor which has the cylinders arranged parallel to and round the H- crank-shaft. 229
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