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threelonmusketeers@sh.itjust.works

New propellant combo just dropped (infosec.pub)

submitted 1 week ago by threelonmusketeers@sh.itjust.works to c/spaceflightmemes@sh.itjust.works

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I propose the hydrogen cyanide - fluorine rocket.

It has the fabulous potential for a vacuum Isp of up to 380s, with a propellant mix density of 1023 kg/m^3, handily beating methalox mixes. It is non-cryogenic and burns at over 4000K.

Exhaust is 43.3% hydrogen fluoride.

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[–] NaibofTabr 30 points 1 week ago (3 children)

Hydrogen fluoride (fluorane) is an inorganic compound with chemical formula HF. It is a very poisonous, colorless gas or liquid that dissolves in water to yield hydrofluoric acid.
[...]
Hydrogen fluoride is an extremely dangerous gas, forming corrosive and penetrating hydrofluoric acid upon contact with moisture. The gas can also cause blindness by rapid destruction of the corneas.

from Wikipedia

Oh yeah, sounds like fun.

Um, how quickly would this eat the bell nozzle? I feel like the rocket engine just wouldn't last very long.

[–] untakenusername@sh.itjust.works 5 points 1 week ago

there's probably some material that would work for this, like the sort they use in the inside of the oxidizer turbopump in staged combustion rocket engines

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