PPRuNe Forums - View Single Post - Jet Aircraft Fuel Burn Variations with Altitude
Old 27th Mar 2016, 02:26
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CallmeJB
 
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Here's an (over)simplification of where to start:

Fuel burn (lbs/hour) for a given Indicated Air Speed is essentially constant, even as altitude changes.

For a given Indicated Air Speed, True Air Speed increases with an increase in altitude.
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