Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 198
A near view Le CLriTiHg aiQr. Other peculiarities of the gasoline motor affectconsiderably its use for aeroplanes. The continualand oft-re|3eated explosions of the gaseous mixtureinside of the cylinder generate great heat, and this not onlv interferes with its regularity of movement. … The Holmes rotative engine. 7-cylinder 35 horse-power, weighing 160 pounds.Aa American engine built in Chicago, 111. 198 FLYING MACHINES: MOTORS. but within a very brief time checks it altogether.To keep the cylinder cool enough to be serviceable,two methods are in use: the air-cooling system…
Aeronautics
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