German researcher Otto Lutz introduced the swing-piston concept about 1923. Intended primarily as a high pressure compressor or gas generator for relatively high power gas turbine engines for ...

It is very rare that i get excited about any alternative technology with huge promises, but this looks really awesome: Oh it probably has been invented a long time ago just it didn't work very well.

Engineers have a lot to think about when designing new engines, and one of the biggest considerations is the shape of the pistons in the cylinders.