general/piston-engines
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Reciprocating engine
Engine utilising one or more reciprocating pistons
Reversing gear
Controller for the valves on a steam engine
Rhombic drive
Method of transferring mechanical energy
Mean piston speed
Average speed of the piston in a reciprocating engine
Jeep Tornado engine
American automobile engine
Single- and double-acting cylinders
Classification of reciprocating engine cylinders
Mean effective pressure
Measure of an engine's capacity to do work
Otto cycle
Thermodynamic cycle for spark ignition piston engines