Harper's Aircraft Book; Why Aeroplanes Fly, How to Make Models, And All About Aircraft, Little And Big

Cover Harper's Aircraft Book; Why Aeroplanes Fly, How to Make Models, And All About Aircraft, Little And Big
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i6, and are operated by push-rods, which are actuated by passing over stationary cams.
The intake-valve is situated in the top of the piston, and Fig. 17 is opened by a metal dog which is operated by the centrifugal force of the revolving cylinders.
The crank-case serves as the inlet for the fuel, and the whole motor is thus very simple and free from complicated parts.
154 THE HEART OF THE AEROPLANE 1 hese rotating-motors have been used extensively, and the majont)' of speed, altitude, and othe
...r records were made with rotating-engines. Unfortunateljs they are very short-lived, excessivel\' costly, and are very dirty in opera- tion.
As they are lubricated by castor oil, and are whirling round and round at a speed of from i.oooto i.Soo revolutions Fig. 18 a minute, the oil is thrown all about, and it is usually neces- sary to inclose the motors in a guard, or rim, of metal.
A unique and distinct type of rotating-motor is the "Just- rite," made by the H. L. F. Trebert Company, of Rochester.


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