The Difference Between Flying Round-Engine Taildraggers and Turbine-Powered Jets This is a photo of the Douglas AD-6 attack aircraft powered by a 18 cylinder double row Wright engineof 2700 hp turning a 4 bladed 13.5 foot propeller as described below by the pilot. https://groups.google.com/forum/#!topic/dragonflight/RdFwLmHxlb4