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4 months ago
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NASA Pulls Off Delicate Thruster Swap, Keeping Voy...
They expel the Hydrazine(N2H4) fuel out of a spherical Ti tank by inflating a rubber balloon that involve Teflon inside the tank using helium supply. I guess N2H4 was potent enough to degrade even those space age materials.
1:
https://ntrs.nasa.gov/api/citations/19810001583/downloads/19...
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1: https://ntrs.nasa.gov/api/citations/19810001583/downloads/19...