plenty of model rockets were flown at dairy air (run by Tripoli) this year. I'm to lazy to do the math, but my camera got one moving about 30 feet a frame, at 30 fps. Nobody broke 10k, at least on Saturday (it was 105 Fahrenheit, so we ditched Saturday evening.) the rocket with the most thrust was flying two stage M2500 to M150.(the motor ranking is the alphabet, b is double a, c is double b, etc. and A can launch a pound about 200 feet.) I believe that the numbers by the letters are the number of grains.