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Old 6th October 2002 | 21:41
  #10 (permalink)  
Dan Winterland
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Joined: Jun 2001
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From: Blighty
The GE CF6 on a 747-400 has a flight idle N2 of about 74%, some 12% higher than the ground idle setting.

Older engines tend to be longer. About 11 seconds on the Viper in the Jet Provost I seem to remember.
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