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So the Convair NB-36H, a prototype US bomber from the 1950's that was designed to eventually be nuclear-powered, carried a 1 MW air-cooled reactor with a mass of 16 Mg (16,000 kg / 35,000 lbs). If we put the reactor from the NB-36H in an airship and use it to heat steam as the lifting gas (let's assume that the reactor has enough power to keep the steam ...


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The other answer you quoted already says that steam as a lifting gas is not feasible no matter what heat source you use. A steam lifting gas nuclear powered airship is not any more feasible because you'd be limited by the amount of water you can carry, and even small nuclear reactors are heavy. You would get much better results by simply heating air with the ...


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