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Thread: Which Optimum level to use? CFP vs FMS?
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Old 6th Apr 2012, 02:38
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FoxHunter
 
Join Date: May 1999
Location: Unionville, PA, USA
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I've found the FMS will always want to climb earlier than the CFP, MD11/MD10.
Since the fuel penalty is greater for being too high vs too low I've always used the CFP.
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