zaitcev: Все сообщения за 9 Ноября 2014 года

Restartable solid rocket motor » The Unwanted Blog

The common wisdom is that solid rcket motors cannot be throttled, cannot be stopped. This is in fact wrong… with effort, the level of thrust can be altered at will, and the combustion even stopped. The best way to do this is to change the port area.  A common approach to doing that has been to put a plug in the throat; by moving the plug fore or aft, the effective throat area can be increased or decreased. To shut the motor down, the plug needs to be moved very quickly, rapidly increasing throat area. A dP/dT (change in pressure over time) of around 100,000 psi per second is generally required to extinguish a solid rocket. // Дальше — up-ship.com