metrodriver
No jobs anymore in here??
- Joined
- Aug 25, 2002
- Posts
- 492
flychicago, those things you talk about are the (a/c)pack fans, They have an automatic door and are very loud and draw lots of electrical power (bunch of stuff to do if you lose an engine or two). They are on whenever you have a pack operating on the ground or when the flaps are not up in flight. Normally cooling air (that flows around the packs and 2 intercoolers) for the packs comes through 2 openings with adjustable doors that are in the bottom of the central fuselage, but that system doesn't work if you're not moving, hence the pack fans.
I'm sure these things are louder than the apu.
I'm sure these things are louder than the apu.