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gaseous-propellant rocket engine
A small rocket engine that works by expelling a gas, such as nitrogen or helium, stored in (relatively heavy) tanks at high pressure. Cold gas engines were used on many early spacecraft as attitude control systems and are still occasionally used for this purpose. Warm gas engines achieve better performance by heating the propellant, electrically or chemically, before expulsion.
Related categories
• ROCKET ENGINE TYPES• ROCKETRY TERMINOLOGY
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