The following motors have been certified by NAR Standards & Testing as of March 29, 1998 for general use as model rocket motors. They are certified for contest use effective May 28, 1998. Apogee: 18mm x 70mm: D10-3, 5, 7 (20 Newton-seconds total impulse, 9.8 grams propellant mass) Jim Cook, Secretary for NAR Standards & Testing |