Originally Posted by
BeatNavy
I’m just tying to figure out how if I back out of the gate in JFK, start 1 and keep the APU going, then start #2 about 45 mins later, how that will “crack a cold section,” versus starting 1 and 2 initially, then taxiing for 45 minutes. How does not starting an engine cause wear and tear?
What I was alluding to was that SET may not be all that much of a cost saver, unless one anticipates a really significant taxi. On the flip side, doing a SET for a short taxi, getting near the runway, having to hurry up and start then T/O without proper warm-up time is more likely to cause engine wear/damage that would offset the fuel savings rather quickly.