Simviation Forum - cabin pressure

	Search the archive:

Simviation Main Site | Site Search | Upload Images

Simviation Forum › Real World › Real Aviation › cabin pressure

(Moderators: Mitch., Fly2e, ozzy72, beaky, Clipper, JBaymore, Bob70, BigTruck)

‹ Previous Topic | Next Topic ›

Pages: 1

cabin pressure (Read 252 times)

Nov 3^rd, 2004 at 1:38am

monkeyboy726 Offline
Colonel
Wazzup

Posts: 25

does anybody know the average cabin atmospheric pressure on the majority of airliners? is it anywhere near the pressure around sea level? thanx

IP Logged

Reply #1 - Nov 3^rd, 2004 at 4:10am

Eskimo Offline
Colonel
I'm not speeding officer
-- I'm just flying low.
YBAF - Archerfield, Brisbane

Gender:
Posts: 287

I think it's to do with the cruising height.

Eg. FL350 (35,000), the pressure is about 8000 ft.

I think. Wink

Aviation Downunder - Now Open

IP Logged

Reply #2 - Nov 3^rd, 2004 at 5:35am

Craig. Offline
Colonel
Birmingham

Gender:
Posts: 18590

8000 feet once at cruise altitude regardless from what i have read

IP Logged

Reply #3 - Nov 3^rd, 2004 at 8:00am

Nexus Offline
Colonel
The greater of two evils...

Gender:
Posts: 3282

These are general figures

FL220-FL260 = Cabin altitude of 4000
FL260-FL320 = Cabin altitude of 6000
FL320-FL410 = Cabin altitude of 8000

The pressurization systems on modern airliners are very automated so the only thing the system needs to know is the CRZ altitude/ landing field elevation. When at crz level it regulates the psid (psi differential between cabin and ambient psi) after a set schedule which can look like this

SEA LEVEL to 18.500ft= Landing field elevation
18.500-28.000ft = 7.45 psid
28.000ft- 37.000ft = 7.80 psid
37.000ft and above = 8.35 psid

IP Logged

Pages: 1

‹ Previous Topic | Next Topic ›

« Home

‹ Board

Top of this page