. Automotive industries . 13 14 15 16 17 18LBS AIR PER LB. FUEL these conditions, it supplies a mixture too lean for en-gine operation. Moreover, some of the previously men-tioned power loss at full throttle can be offset by an in-crease in compression ratio. A throttled engine can em-ploy a higher ratio with safetv than one operating atfull throttle. A Two-Cylinder Air-Cooled Aircraft Engine FOR light sport planes the air cooled two-cylinder op-posed engine seems to offer advantages. An engineof this type, rated at 40 hp. and weighing 128 lb., is beingproduced by the Aircraft Repair & Service
. Automotive industries . 13 14 15 16 17 18LBS AIR PER LB. FUEL these conditions, it supplies a mixture too lean for en-gine operation. Moreover, some of the previously men-tioned power loss at full throttle can be offset by an in-crease in compression ratio. A throttled engine can em-ploy a higher ratio with safetv than one operating atfull throttle. A Two-Cylinder Air-Cooled Aircraft Engine FOR light sport planes the air cooled two-cylinder op-posed engine seems to offer advantages. An engineof this type, rated at 40 hp. and weighing 128 lb., is beingproduced by the Aircraft Repair & Service Co. It has4 x 6 in. cylinders cast of aluminum, with steel pistons with crowned heads are used. Theseare fitted with two rings at the top and a scraper ringbelow the piston pin. Large holes are drilled in the piston. skirt to reduce its weight. The connecting rods are of Hsection, one straight and the other forked, hence the crankis of the single throw type and both pistons always movein the same direction. To minimize vibration, counter-weights are secured to the crankshaft arms. The cylin-der heads are detachable, and the valves, located in theheads, are operated by individual adjustable rocker arms. The lubricating system is of the dry sump type, all ex-cess oil returning to an oil sump which is provided withcooling flanges. Oil is pumped to all bearings by a gearpump, a constant pressure being maintained. The carburetor is a Zenith and ignition is by a Philbrinbattery system. To prevent chilling of the incomingcharge by the slip stream, the inlet manifold is locatedback of the engine. A ball thrust bearing is provided totake up the propeller thrust. The over all length of theengine, inclusive of the propeller hub, is 25% in.; thewidth over the rocker arms, 42 in.; the height, 25 in., andthe di
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
