11. The AMROC-derived hybrid rocket motors were used in several SpaceDev projects that followed. 12. January's accident was blamed on a turbo-pump failure freezing the third-stage rocket motor . 13. The largest vendor of model rocket motors in the world is Estes Industries. 14. When the trigger is pressed, the rocket motor is fired electronically. 15. Rocket motors can be attached to objects to propel them across a level.16. Thiokol pioneered the short-burn rocket motors used in aircraft ejection seats. 17. The AJ-260-2 rocket motor remains in the silo to this day. 18. Immediately after rocket burn-out, four more rocket motors despun the vehicle. 19. Titan 4s are two-stage, liquid-fuel rockets with two solid-fuel rocket motors . 20. The pulsed rocket motor is made by pouring each segment of propellant separately.
