Re: 42,000 feet

Date:         30 Mar 97 03:54:27 
From:         jato@direct.ca
Organization: Canada Internet Direct, Inc.
References:   1 2 3 4 5
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katie@physics12.Berkeley.EDU (Katie Schwarz) wrote:
Altitude certification of aircraft depend upon a large number of
requirements. Pressurization limitations are normally based on
structural limitations (ie. maximum differential to maintain the
industry normal maximum cabin altitude of 8000 ft.), or time required
to descend to a more hospitable altitude in case of a pressurization
malfunction.

The Concord frequently flies at altitudes above FL600. The passenger
masks are not required to sustain phisiological requirements with a
60,000 foot cabin altitude as complete explosive decompressions are
extremely rare.

Most new generation business jets are certified between 45,000 ft. and
51,000 ft. and routinely fly between 41,000 ft. and 47,000 ft. for
economy.