When people say rotary engine, they usually mean Wankel. Mazda put it in some of their coolest cars, and recently in the MX-30 REV, though there it does the most humiliating job ever: it's a range ...

After reciprocating, sliding vane compressors, also referred to as rotary vane compressors, are one of the oldest types of compressors. The first known description of a sliding vane pump was in a book ...