Greetings
TAS increases 1 kt for each 1 deg Delta ISA so ISA + 10 would give TAS + 10 Kts, fuel bun increases as well, depending on engines, I think the average is 1% to 0.5% FF per deg Delta ISA.
At Tropopause delta ISA equals ZERO so no increase in TAS,
So what happens to the FF
