Inline - Rotary - Turbo Prop power plants http://www.edwards.af.mil/moments/docs_ ... 02-07.html http://www.grc.nasa.gov/WWW/K-12/airplane/turbine.html http://www.centennialofflight.gov/essay ... Aero50.htm http://www.ww2guide.com/engines.shtml I am really fascinated on the historical accounts of technology advances during WW II and post WWII. Here is a good start to this line of research.