Originally Posted by
Uplinker
Also;
The APU is a gas turbine engine running on high internal temperatures, so the longer you can leave it to thermally stabilise before making big power demands, the better for its health and longevity.
[size=33px]
[/size]
If you're on a multi leg day, with 50 mins turnaround, can you consider that the APU is still warm from the previous start ?