When reading about the disadvantages of the Wankel rotary engine, some of the more prominent reasons listed are the lower fuel-economy, lower emissions quality as well as lower torque:
Using a lighter fuel like propane/methane/H2 could play to the Wankel's strengths while also reducing the emissions problem. The electric motor could provide the better torque at low rpm, while the wankel would extend the rpm/speed cieling.
What are the pro's and cons of wankel-electric hybrid compared to reciprocating piston-electric hybrid?
Comments?