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