rckr1949 try this, and make sure that you used the correct propeller. Im sure you did, but might check. rckr1949 is online now One trick not in the manual is to let it sit on a level surface after you have linked and hold full right yaw (no throttle) and then snap the "aileron" side to side quickly until the blue led's blink. This recalibrate the gyros/accelerometers whatevers. I was initially worried that it didn't have a yaw trim - but this has eliminated any tendency to rotate on its own.