Re: 42,000 feet

Date:         18 Mar 97 03:14:50 
From:         wb8foz@netcom.com (David Lesher)
Organization: NRK Clinic for habitual NetNews Abusers - Beltway Annex
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Andrew Goldfinger <Andy.Goldfinger@jhuapl.edu> writes:

>     I recently flew at 41,000 feet in a commercial airliner (actually FL
>410, I assume).  According to a friend, at around 42,000 feet free
>flowing oxygen is no longer adequate for maintenance of life, and
>pressure breathing is required.  Therefore, the emergency oxygen system
>(as an SWA flight attendent put it: "these are not party hats") on
>commercial aircraft would not be sufficient.  Does this limit the
>practical ceiling of commercial flights?  What is done for emergency
>oxygen on the Concord?

The key is "sustained" I suspect. When the masks drop 1 meter,
the a/c then drops several km until it's at a suitable altitude;-\

Exactly how long that takes is the issue. The cockpit crew are the
only folks that *really* need to be unimpaired. The cabin crew and
px only need to be unharmed during the dive.


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