Single Spool Turboprop Engine Three Spool Turboprop Engine Two Spool Turboprop Engine Turbojet Engine Turbojet with Afterburner Turboprop Engine Turbofan Engine Wankel Engine Boxer Engine Diesel Pile Driver Two Crank Opposed Piston Engine Napier Deltic Engine Wobbler Engine One Crank Opposed Piston Engine Rotary Engine Radial Engine