Your right it is not that likely , but remotely possible. Thanks for taking the time to reply. I just want to build the model with that particular consideration in mind. The way the german speed guys have their rules setup you only have 50 meters to enter the 100 meter course for the speed run. While pylon planes and gliders can handle it with out burning off too much speed, a plane that is designed for real speed will have problems with small radius turns like that. 513 feet/sec may be possible with the right design given enough power, but that turn will scrub off a lot of speed.