Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 199
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… … The 180 horse-power engine of Sir Hiram Maxim; of the opposed type,compound, and driven by steam. der wall. These flanges take up the intense heat,and being spread out over a large surface in thisway, the rushing of the air through them as the ma-chine flies (or sometimes blown through them witha…
Aeronautics
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