PPRuNe Forums - View Single Post - confusion with the MACHcrit and Mach Trimmer
Old 28th Feb 2010, 16:12
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aslan1982
 
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MACH TRIM is automatically applied above M0.615 (classics & NG's), M0.715 (-1/200) to the elevators to counteract this and to provide speed stability.

source: The Boeing 737 Technical Site
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