Methanol freezes at some -140F! Of course the nitro methane freezes closer to -20F... I don’t know where your particular blend of fuel will gel up, but I have never had any trouble with fuel well below 0F.

I would be more concerned about my hands freezing off. Do you wear some sort of gloves when you are flying at -40F? I have been looking for a pair of gloves for some time that keep my hands somewhat warm while allowing a good feel of the control sticks.


Spiro