When you're at an airport and see propeller aircraft, you likely think it is powered by a piston engine. This is usually true among smaller planes, like the Cessa 172 Skyhawk and the Piper Archer, or ...

DeltaHawk Engines of Racine, Wisconsin, said May 18 that the FAA has certified its DHK180 jet-fueled aircraft piston engine. The privately held company, founded in 1996 to develop a clean-sheet design ...