تماشای ویدئو Part 4 How to Build a High Power Rocket Insulated Delay Grain Bulkheads از آی-ویدئو
Part 4 of the Terrestrial Escape Rocket Project. Start to finish instructions on building insulated Delay Grain Bulkheads for parachute deployment.
Modification of rocketmanbkk Flexi-Fuel delay grain.