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Thread: Which Optimum level to use? CFP vs FMS?
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Old 6th April 2012 | 02:38
  #11 (permalink)  
FoxHunter
 
Joined: May 1999
Posts: 117
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From: Unionville, PA, USA
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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