All About Engines

The Petrol Motor 229 were known only to those immediately concerned in their production and use. It may be said, however, that in addition to the Gnome and the Green engines, and the R.A.F. designed at the Royal Aircraft Fac- tory, nearly every well - known type of motor-car engine has been adapted for aeroplanes. The Rolls- Royce is popular on account of its reliability ; the RbURETTOR Throttle. Valve Induction Valve Compressed Air Distributor Exhaust Water Jacketted ExhaustValve Rocking Lever Magneto Water Inlet Pipe Water Pump OilRjmp CompressedAir Starting VAUt AirIn letTo Base Chamber Air Regulator Air Pipe From BaseChamber ToCarburettor Fig. 130.—Diagram of V type of aeroplane engine GEM CkS improved form of the Austro-Daimler, known as the Beardmore, is being made in large numbers ; the Sunbeam, and several others are also used. The Gnome remains the only radial, the only rotary, and the only air-cooled motor. So long as the number of cylinders does not exceed six, the ordin- ary vertical type is preferred; but for any number beyond cylinders are so arranged that each pair forms a V and works on the same cranks as in Fig. 130. In most of them the valves are situated in the tops of the cylinder, rendering a combustion chamber