Alphafloor From Chile, joined Jun 2004, 1277 posts, RR: 44 Reply 12, posted (8 years 5 months 1 week 9 hours ago) and read 4007 times:
My understanding is that this outflow valve is regulating the DeltaP of the cabin pressurization, right ? My third question would be: is this outflow valve open sometimes during cruise ? I have always noticed this outlflow valve open while the a/c is on the ground and then closed before taxi.
B747FE From Hong Kong, joined Jun 2004, 230 posts, RR: 3 Reply 14, posted (8 years 5 months 1 week 4 hours ago) and read 3968 times:
The outflow valves are variable area units that control the rate of discharge of compartment air, and therefore Delta P. This valves are always modulating to maintain the cabin in the selected flight profile.
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