A reciprocating engine is different than when using rotors.
Rotors are used in a pistonless rotary engine, using one or more
rotors and sometimes called rotary pistons.
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did the rotary engine (Hargrave lawrence) help
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A rotary steam engine was a fire engine basically
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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.