For what it's worth, if someone is trying to build a liquid fuel rocket, copious amounts of LN2 shouldn't be a problem. The worst problem is the efficiency which will be paid in LN2 boiloff.īut LN2 is relatively cheap.
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It can be dealt with a series of washing bottles with a rich solution of lye and one container with a bag of dry lye inside.
And all of that assumes that you already have a huge quantity of LN2 sitting ready, because you are going to be wasting that like crazy.
And then you have to deal with corrosive effects, the cryogenic temperatures, etc. Only then you start getting good quantities of LO2. It will also cause problems, albeit, not as severe. First, you have to get all the moisture out of the air, or your condensation tube will freeze shut. Edited Octoby K^2Īnd have any of you guys actually tried liquefying O2? It's a pain. Temperature and ISP are going to be OX pressure limited, so it doesn't really matter.Īnd have any of you guys actually tried liquefying O2? It's a pain. Suborbitals noted, but OP isn't going to build anything large enough or running hot enough for long enough for it to truly be an issue. Yes, it tends to heat up and run in chunks for larger motors, as C. The reason I suggested paraffin wax is that it's easy to obtain, it is cheap, and it is easy to work with. If you just buy a big chunk of rubber and cut it into an engine, odds are, you'll have problems with cracking, which can cause detonation, and who wants that? Rubber is what's frequently used, but there is rubber and there is rubber.
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