Noun
an internal-combustion engine having cylinders arranged radially around a central crankcase
an internal-combustion engine in which power is transmitted directly to rotating components
Source: WordNetAll engines exhibit oil loss, however the rotary engine is engineered with a sealed motor, unlike a piston engine that has a film of oil that splashes on the walls of the cylinder to lubricate them, hence an oil "control" ring. Source: Internet
Another motorcycle with a rotary engine was Charles Redrup 's 1912 Redrup Radial, which was a three-cylinder 303 cc rotary engine fitted to a number of motorcycles by Redrup. Source: Internet
A Wankel rotary engine has stronger flows of air-fuel mixture and a longer operating cycle than a reciprocating engine, realizing concomitantly thorough mixing of hydrogen and air. Source: Internet
Emil Berliner sponsored its development of the 5-cylinder Adams-Farwell rotary engine design concept as a lightweight power unit for his unsuccessful helicopter experiments. Source: Internet
Experiments with the concept of the rotary engine continued, however. Source: Internet
Félix Millet showed a 5-cylinder rotary engine built into a bicycle wheel at the Exposition Universelle in Paris in 1889. Source: Internet