alt Hacker NewsI believe LOX is injected into the engine as a liquid, it gets atomised rather than boiled?
And you can have fires where both fuel and oxidiser are solid: thermite reactions.
"Fire point" seems to be more of a factor for conventional fire concerns, albeit I'm judging a phrase I've not heard before by a stub-sized Wikipedia page: https://en.wikipedia.org/wiki/Fire_point
It's not about the state itself, but about temperature. For things to burn you need to have three elements:
- a fuel
- an oxidizer
- enough heat
It's the fire triangle.