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Is a ball of ice practical as reaction mass and forward shielding?

" ... our solar system ... don't think a dust shield is needed" - for starters, there is only ONE 'solar system' - ours! The sun is SOL - hence "solar" - there are other STAR ...
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Is adiabatic flame temperature the same as nozzle stagnation temperature?

Is the adiabatic flame temperature equal to the nozzle stagnation temperature Pretty much. The adiabatic flame temperature is definitionally the lossless temperature of product gases following a ...
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How exactly does depressurization work in a solid rocket motor?

I have never throttled a solid fuel rocket, so the following answer is theoretical rather than experience-based. I find the best way to understand propellants (explosives, ballistic propellants and ...
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