How do they manage the low fuel temps? A bit hard for a Twotter to descend to a lower level and increase mach number!
Fuel tanks are in the belly, not the wings. Unpressurised cabin. I'm guessing there might be a way to keep the ferry tanks warm enough via normal bleed air heating of the cabin and in turn keep the main tank fuel warm, either through circulating the fuel or ducting warm air around it?
No experience with Twotter winter ops myself, but one or two hours on type in a former life. Great machine.
Anyone with proper winter experience on the Twotter around who can share info?