My new speed plane...advise needed
Hey all,
Here is my new speed plane. Scratch built fully foam sheeted laminar wing airfoil. Thickness of wing maxes out at 1". the wingspan is 42" and all up weight with a Sport Jett .50 is 2.9 pounds. I did some testing today using a GPS in straight and level flight. My speed was 154mph using a 8x9 prop. This prop gave a ground rpm of 18600. I desperately need about another 16 mph (or more) for it to fulfill my goal when I put it together. I tried several different props (pylon, sport, NN) but 154 was my best run. Anyone have any other prop ideas or whatever that may help me gain some straight level speed? here is a pic :