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13 votes
1 answer
1k views

Why did SpaceX swap the LOX and CH4 tanks between Mk1 and SN1?

According to most sources, the Starship Mk.1 had its LOX main tank (not talking about the header tanks here) on top and its main methane tank below. But it seems the SN1 revision, and all subsequent ...
Piotr's user avatar
  • 131
5 votes
1 answer
287 views

What methods are proposed for storing cryogenic fuels (esp. hydrogen) in space for months or years?

Current Launch vehicles and upper stages must only keep their fuels for minutes or hours, so they are only insulated to keep boiloff to a few % per day - I've seen 21% per day quoted for Centaur on ...
Talisker's user avatar
  • 352
5 votes
1 answer
471 views

Insulation used in the plumbing line of the actual rockets

While using the pipes for plumbing of the liquid propellants at pretty low temperature because of which ice form on the line if not insulated or poorly insulated, which can lead to liquid to gas ...
Amar's user avatar
  • 2,246
5 votes
1 answer
167 views

What temperature difference do the injectors in a cryo engine experience?

A quick follow-up to Does ISRO's Cryogenic Upper Stage have restart capability? What temperature difference do the injectors in a cryo engine experience between the propellant tank, and the ...
Everyone's user avatar
  • 13.6k