FL420
Blues vs. Birds-Tailhook
- Joined
- Oct 11, 2005
- Posts
- 626
On the A320 and B757 what actually turns the compressor and turbine of the pack's ACM?
Is it high pressure air from the engine or APU compressor impinging on the compressor or turbine wheel of the ACM?
If not, is the ACM run by an AC motor while the hot bleed air from the engine or APU is just used to provide the air to be compressed and then expanded for cooling by the ACM?
If it's hot air turning the ACM, what are the CB's for the pressurization/air conditioning system on the B757 cockpit overhead panel for?
TIA
Is it high pressure air from the engine or APU compressor impinging on the compressor or turbine wheel of the ACM?
If not, is the ACM run by an AC motor while the hot bleed air from the engine or APU is just used to provide the air to be compressed and then expanded for cooling by the ACM?
If it's hot air turning the ACM, what are the CB's for the pressurization/air conditioning system on the B757 cockpit overhead panel for?
TIA