(Henry Spencer) wrote in message ...
In article ,
The tricky part, really, is the oxidizer. Fuels are generally cheap and
straightforward. There are about four reasonable choices of oxidizer --
LOX, peroxide, N2O, and WFNA -- each with its own set of disadvantages.
LOX and peroxide both require meticulous cleanliness, LOX is cryogenic,
high-grade peroxide is costly and hard to get, N2O requires high pressure,
WFNA is highly corrosive.

If the high pressure of N2O is a pain, is there any reason why people
couldn't use NBP N2O? It's not hugely cryogenic - minus 90C vs
minus 180C for LOX, and with a higher specific heat of vaporization it
should boil off much more slowly.

Or is the general theory that if you're going to go to the hassle of
using moderately cryogenic nitrous that you may as well bite the
bullet and use LOX for the increased performance?

-jake