Watt invented a rotary engine, and Yule many years afterward constructed such engines at Glasgow.
A brief description of the motor here will suffice to show the general principle of the rotary engine.
The gyroscopic action of a rotary engine will affect the longitudinal stability when an aeroplane is turned to right or left.
Many authorities, in fact, declare that the rotary engine is the aeroplane motor of the future.
The Rotary, of New York, was a new steamer for freighting purposes, with a rotary engine and common propeller.
It is a small monoplane, with a French rotary engine in front; it is about half as large as a Taube.
When the rotary engine was finished, the partners sought to obtain a charter, when lo!
It has recently become common to construct the steam fire-engine with rotary engine and pump (Fig. 122).
The pump used with this engine is, as shown in the above illustration, somewhat similar to the rotary engine driving it.
These advantages adapt the rotary engine, in an especial manner, to the driving of a locomotive or steam fire-engine.