AeroPac Network
Science, Technology, Pyrotechnics, Experimental Rocketry - AeroPac's. Association of Experimental Rocketry of the Pacific organizes regular high power rocket launches in Northern California and Nevada.
https://www.aeropac.org/
National Association of Rocketry
Science, Technology, Pyrotechnics, Experimental Rocketry - National Association of Rocketry. The NAR is the oldest and largest sport rocketry organization in the world.
http://www.nar.org/
Real rocket science. With references and design equations.
Call Black Sky Corporation in Carlsbad, California for real rocket science. We create consumer aerospace projects such as model rocket kits, pryotechnic devices, propulsion systems, and more than 2,000 avionics systems and rail systems.
https://www.blacksky.com/
Designing Rocket Motors Home Page
Science, Technology, Pyrotechnics, Experimental Rocketry - Designing Rocket Motors. Publications, articles, software and discussion groups about chemical rocket motors.
http://www.chemroc.com/
Tripoli Rocketry Association
Science, Technology, Pyrotechnics, Experimental Rocketry - Tripoli. Tripoli is a non-profit organization dedicated to the advancement and operation of non-professional high power rocketry.
https://www.tripoli.org
Jetex Engineering Works
Homepage of Jetex.org, the web's premier source of micro rocket motor and model jet resources
https://jetex.org/