PPRuNe Forums - View Single Post - Mach difference at equal cost index comparison
Old 11th January 2007 | 01:08
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Old Smokey
 
Joined: Jun 2004
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From: Australia
For a B777-200/200ER/300 at CI=85 at OPTIMUM level and Nil Wind, a Climb / Cruise Mach of 0.835 is typical. In the same conditions, M0.84 is more typical for the B777-300ER.

Naturally, cruise at Off-Optimum levels, and wind component, will change these 'ball-park' figures.

Regards,

Old Smokey
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