If I am understanding correctly, you are saying that you think that the blades are stalled on the 5 x 5 prop that is turning 22,000rpm. My guess is that they would not be stalled at 10,000 rpm. Did I miss something here. Was it that the blades were accelerated so fast that the blades became stalled? Would that mean that it does matter what the speed of the air is traveling over the blade? The tip speed of this prop is only 480FT/SEC. Is it true that the blades will come out of stall if the plane stays static?