Sarich orbital engine

A supercharger is required if operated in two stroke mode since crankcase pumping can't be used to charge the combustion chamber.

Interestingly, in his seminal book [3] researching and documenting all the possible ways to create a rotary piston displacer, Felix Wankel shows the orbiting piston and reciprocating vane mechanism used in the orbital engine.

A technical paper[5] was presented to the Society of Automotive Engineers in 1982, and is now part of their historic transaction collection.

[6][7] During prototyping process, the engine has been installed in 3 vehicles: Toyota Kijang (3 cylinder unit), and Suzuki Karimun.

(2 cylinder unit), installed by Sangeet Hari Kapoor when he was working in PT Wahana Perkasa Auto Jaya, which is a company under the Texmaco group.