Helicotoroidal vane rotary engine
High efficiency tri-rotor ballistic engine
High speed rotary engine and ignition system
High-output robust rotary engine with a symmetrical drive...
High-power rotary engine with varaiable compression ratio
Hinged rotor internal combustion engine
Homogenous charge compression ignition and barrel engines
Hot wall combustion insert for a rotary vane pumping machine
Housing wheel engine
Hybrid rotary engine