Duration Events « U.S. Model Rocket Sporting Code US Model Rocket Sporting Code Rules Revision Process Form About the Sporting Code List of Changes NAR Contest Board Directory Model Rocket Safety Code Introduction Competition Altitude Events Payload Events Duration Events Craftsmanship Events Miscellaneous Events Provisional Events Appendix Parachute Duration Rules Streamer Duration rules Helicopter Duration rules Super-Roc Duration rules Egg Lofting Duration rules Dual Egg Lofting Duration rules Boost Glider Duration rules Rocket Glider Duration rules Flex-Wing Boost Glider Duration rules Precision Duration rules