Originally Posted by
Crille
As said earlier you need the APU running to get air conditioning, and most bigger airports today have a rule not to start the APU until 10min before departure. This is the case in CPH among others.
And yea, as a "half" aeroospace engineer, you either need those tubes or some electrical motors for it to work on the ground without the main engines. But putting in electrical motors for this are expensive, heavy and not really needed. They can always board later if thye know that they will be delayed. The cooling which they use in South Asia makes the plans a bit foggy. The first time u see it, u might get a little bit worried hehe...
