I flew mine a few times these past few weeks with the DLE 20 spinning a Xoar 15x8 PJA Prop. The plane is highly modified with 7 robarts per wing and small robarts per stabilizer surface. Servos installed in the tail etc. The fastest level flight pass I was able to get is 103 mph. I think out of a dive I pullled off 135 but I don't consider this a true speed. I wish it was faster but it's not. Perhaps someone could explain how they got more true speed out of it.