Closed, the accuracy of my answer is solely dependent on the details given.
did the rotary engine (Hargrave lawrence) help
A rotary steam engine was a fire engine basically
0. A Rotary Engine does not have any pistons.The rotary engine is an early type of combustion engine. There is no particular quantity of pistons to a rotary engine, but usually an odd number. The type of engine known as the Wankel engine and sometimes known as a rotary engine has no pistons, but has one rotor per combustion chamber.
The other name for the rotary is the Wankel engine.
The term rotary piston engine can have several meanings:Rotary engine, the piston engine that rotates in operation, as used on World War I fighter aircraftPistonless rotary engine, the engines which use rotors or rotary pistons instead of conventional reciprocating pistons
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Andrew J. Beard
Not all of the Mazdas have had the rotary engine, but only the RX model
epitrochoid
No, rotary engines went out of use in aircraft in WW1.
the rotary engine
wankel rotary engine