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Do they pump the hydrogen back into storage or bleed it all into the atmosphere if they need to empty the fuel tanks?
by tppiotrowski 4y ago
Do they pump the hydrogen back into storage or bleed it all into the atmosphere if they need to empty the fuel tanks?
- nordsieck 4y ago> Do they pump the hydrogen back into storage or bleed it all into the atmosphere if they need to empty the fuel tanks? They pump it back. But some of it warms and turns to gas while it's being "used", so that part bleeds off. > While the vehicle is filled with liquid propellant, some of the LH2 is consumed for engine conditioning and some boils off inside the tanks. If a launch attempt was to be scrubbed after waiting through a whole two-hour launch window, and the propellants in the tanks were drained back into the spheres, they would end up being over 280,000 gallons short of the LH2 needed for another attempt. https://www.nasaspaceflight.com/2021/11/artemis-1-launch-periods/ https://www.nasaspaceflight.com/2021/11/artemis-1-launch-per...