XRV Rocket Chronicles, 5 pages.Reloadable solid rocket motors basically consist of a motor casing which is lined with heat resistant material and filled with a combustible propellant. The propellant is burned to provide high volumes of expanding gases, which are accelerated through a nozzle at one end of the motor to provide thrust according to Newton's third law. To help to contain these very hot expanding gases within the motor casing so that they can be directed towards the nozzle, flexible o-ring seals are incorporated in the seams of the motor casing. Most motors with an impulse rating of K or smaller also have a motor delay ejection charge capability that is used for recovery system deployment. Motors larger than K typically don't have this capability. After each use, the motor casing is cleaned out and reloaded with propellant and fresh seals for another flight.Introduction
Propellants
Motor casings & ratings
