PACKS and APU
Hi all
New to this forum but keen on learning about all things aircraft!
Question:
I have a video of a Virgin Atlantic flight to SFO from LGW. They talk about Packs on the one of the pre flight checks and later in little detail during the flight.
Can anyone explain to me what they are/ do and there relevance before take off!
Also in general is the APU used to pass compressed air through jet engines to start the fans turning before fuel injection etc
Cheers
Red Ice