Questions tagged [ntr]

NTR or Nuclear thermal rocket is a subtype of rocket propulsion wherein gas/fluid is heated inside a special-purpose nuclear reactor and then expelled at large velocity.

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Are DUMBO, TIMBERWIND, and other high-thrust NTRs realistically going to deliver on promises of very high thrust/weight?

Nuclear thermal rockets (NTRs) are notable as the most mature technology (the second-most-mature is Project Orion) to provide both high thrust and higher specific impulse than chemical rockets. But "...
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Is there any way to get better performance from an NTR with non-H2 propellant?

Related: Is there some fundamental limitation that would prevent steam-powered rockets from reaching space? Thermal rockets, including nuclear thermal rockets, work best with minimal molecular weight ...
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How does a NTR with an afterburner perform at a stoichiometric mixing ratio?

The LANTR entry at Encyclopedia Astronautica describes how a sample nuclear thermal rocket performs at various mixing ratios of LH2/LOX. It does however stop before reaching the stoichiometric ratio ...