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Re: Just don't select the Lutefisk as your meal Posted by Landjet [Email]  (#16)  [Profile/Gallery]
(more from Landjet) on Wed, 11 Nov 2015 05:57:01
In Reply to: Re: Just don't select the Lutefisk as your meal, Landjet [Profile/Gallery]
, Tue, 10 Nov 2015 20:38:39
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Below is a response from a TWA Captain that flew wide bodies for many years spanning a career in transport aviation for over 30 years. So, it's a driver using the equipment, not a designer of a system trying to overcome the environment. My next post on this will be from the systems side -- a company in Texas is the pneumatic systems overhaul shop for these devices, and has to test them to certain criteria, so we can find out what the test range is for pressurization.
At that point, it becomes the driver's choice on how to apply pressure and keep the tuna in the back happy. Tuna is our slang for passengers......
Direct quote from the left seat:
We try to run the cabin at as low an altitude as we can and the normal cabin pressure differential is 8.9 PSI with pressure releaf valves at 9.42 PSI, so if we are at 33,000 cruise at 8.9 differential, the cabin is about 3,500 as you mentioned. However, when we climb to 390 or 410 for a long Atlantic crossing, the cabin is above 5,000, On descent below 33,000 we bring the cabin down at about 300-500 feet per minute to let ears adjust to pressure change and keep from fogging the windows. We get the cabin down and cool as soon as we can.
, Mon, 9 Nov 2015 18:09:48
, Wed, 11 Nov 2015 03:56:16, Tue, 10 Nov 2015 22:13:22, Tue, 10 Nov 2015 17:26:33, Tue, 10 Nov 2015 21:53:52, Wed, 11 Nov 2015 08:09:12, Wed, 11 Nov 2015 13:44:59, Wed, 11 Nov 2015 13:49:36, Wed, 11 Nov 2015 08:47:24, Wed, 11 Nov 2015 08:21:37, Wed, 11 Nov 2015 03:19:29, Tue, 10 Nov 2015 19:31:23, Tue, 10 Nov 2015 20:38:39, Wed, 11 Nov 2015 05:57:01 <-- Viewing This Message, Tue, 10 Nov 2015 07:27:44
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