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Wow, Robert Stirling is still alive?
One way that NASA previously worked on is the NERVA engine, which was test fired in the 1960s. It used a reactor core to heat up hydrogen to propel it out nozzle. NERVA was much more fuel efficient than chemical engines.
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Wow, Robert Stirling is still alive?
One way that NASA previously worked on is the NERVA engine, which was test fired in the 1960s. It used a reactor core to heat up hydrogen to propel it out nozzle. NERVA was much more fuel efficient than chemical engines.