Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...
3D printing for rocket engines is making a lot of headlines lately. In the last few weeks, we've told you about Aerojet Rocketdyne building and hot-firing a 3D-printed rocket engine and NASA's ...