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#9
January 6th 04, 01:21 AM
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"John Gilmer" wrote in message ...
"Bob Gardner" wrote in message news:QODIb.85072$VB2.187788@attbi_s51... No way. You start off at sea level, of course, and they pump the chamber pressure down to 25000 feet with masks on...then they do some experiments with a few of the pilots taking their masks off, just to show how severely their abilities are affected. Then comes the explosive decompression, which takes the chamber from 25K back down to sea level in a second or two. SIlly question but ... Why would "they" pressurize the aircraft to sea level? Why not some compromise "pressure" like that equivalent to, say, 6,000 or 8,000 feet? EMWTK "they" dont. cabin pressurization is normally at 8000ft though crew may elect to use different cabin pressures under certain circumstances (eg medevac operations where pressurization is a factor) 
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