I remember reading in my encyclopedia that a nuclear rocket engine can provide 2 to 3 times more heat than a solid or liquid propellant but an arcjet rocket can provide 3 to 4 times more heat than a solid or liquid propellant. The more heat the quicker the fuel gas expansion and thus more thrust. So why aren't arcjet engines used instead of nuclear engines?
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Why are nuclear engines used when arcjet engines provide more heat?
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Why are nuclear engines used when arcjet engines provide more heat?
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