I’ve always been a fan of the Wankel Rotary Engine that have been used in Mazda’s for decades, so it was really interesting to come across some other combustion engine designs that don’t require a reciprocating piston. For those not of the engineering background (like myself), it is a little hard to get your head around some of the concepts and trying to visualize the concepts in your head. But have a look at the video’s anyway.
Concentric Rotary Engine
Quasiturbine Rotary Engine
Edward’s Winged Rotary Engine
Possible issues with these designs:
– Sealing issues
– Mechanical wear and tear
– Fuel efficiency and emissions
Nonetheless great effort from the respective patent owners.