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Thread: help in (Manipulation)
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Old 27th Apr 2009, 22:45
  #7 (permalink)  
boredcounter
 
Join Date: Nov 1999
Location: East Midlands
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Crew,
Think ambient lapse rate........

By your math, work out FL250. Then work out FL290.

i.e. take the top FL and use the -ve. or use the bottom FL and use the +ve.
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