B737-300 Pressurisation question
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Join Date: Jun 2006
Location: Australia
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B737-300 Pressurisation question
Assuming departure and destination at sea level. Passing 10,000 ft on climb to 35,000 ft what would the cabin altitude indicate, assuming normal pressurisation mode (auto). On passing (say) 18,000 ft climbing what would be the cabin altitude?
Reason for asking is simulator fidelity check. One simulator I know does not indicate more than 1000 ft cabin altitude while passing 18,000 ft in climb. Is this normal? Is there a formula or rule of thumb to know cabin altitude versus actual altitude at any point in a climb - or descent?
Reason for asking is simulator fidelity check. One simulator I know does not indicate more than 1000 ft cabin altitude while passing 18,000 ft in climb. Is this normal? Is there a formula or rule of thumb to know cabin altitude versus actual altitude at any point in a climb - or descent?
Someone who is less tired than me will be able to tell you what the cabin pressure should be at 10,000ft based on the fact that the diff will read 4psi.
I used to fly with a guy who would always say "10-4 good buddy" in his best truck drivers voice every time we climbed through 10,000ft. Ten for the altitude we were passing, four for the diff that he would check. Now, years later , I can still hear his voice and alway glance up and check.
I used to fly with a guy who would always say "10-4 good buddy" in his best truck drivers voice every time we climbed through 10,000ft. Ten for the altitude we were passing, four for the diff that he would check. Now, years later , I can still hear his voice and alway glance up and check.
Join Date: Jun 2009
Location: slovakia
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tee em,
On the NG, i believe the cabin altitude starts to increase from about 8000 feet pressure altitude, so at 10 000ft, you will have about 1000ft cabin altitude... definitively you should check the RATE of cabin altitude passing 10 000ft.
Pressurization maintains an average of 8000ft cabin altitude at cruise.
So maybe 2000ft cabin altitude/10000feet? I m jobless for the next month..so cant really check in the aircraft...
The cabin altitude versus pressure altitude can be found on the overhead of your aircraft (under the pressurization panel)and up to you to calculate your rule of thumb;-)
Ciao
On the NG, i believe the cabin altitude starts to increase from about 8000 feet pressure altitude, so at 10 000ft, you will have about 1000ft cabin altitude... definitively you should check the RATE of cabin altitude passing 10 000ft.
Pressurization maintains an average of 8000ft cabin altitude at cruise.
So maybe 2000ft cabin altitude/10000feet? I m jobless for the next month..so cant really check in the aircraft...
The cabin altitude versus pressure altitude can be found on the overhead of your aircraft (under the pressurization panel)and up to you to calculate your rule of thumb;-)
Ciao
