A/C Packs
I pinched the following off a current Rumours thread:
'All AC packs rely on high pressure air from the engines or APU to operate..'
My question is (Keep in mind my knowledge of aircraft is very limited and I'm a bit dim also) that you can buy an A/C unit from your local Electrical store that does not need plumbing - just electricity.
In the case of an aircraft - why rob the engines of high pressure air - why not use packs that just require you to rob just the electrical system? I figure this way they can be ground powered as a side benefit as well as being infinitely adjustable as to output.
Put me right someone. Thanks.