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Old 2nd February 2002 | 22:51
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John Farley

Do a Hover - it avoids G
 
Joined: Oct 1999
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From: Chichester West Sussex UK
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Just got off my but and opened a book

ISA temp at 30000ft is -44.4 deg C so ISA + 10 at that height is 10 deg warmer = 34.4 deg C and ISA - 10 is 10 deg colder so -54.4 deg C
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