I've invented a new type rotary engine drive, I'm sure it can be build and work efficiently. It has 6 stages, intake, compression, backflow, ignition, combustion and exhaust. Do you think it has uses in outerspace or to get to outerspace? I don't wish this to be considered spam, however it's way too complicated to explain how it works without a full animation which can be seen at http://griffithsengines.com Anyway, here's hoping not considered spam, here's a screenshot of my work: What do you think? Any use for space? To start off working out how it works, start of when the purple fuel enters the engine and watch from there. Thanks. Paul.