PPRuNe Forums - View Single Post - ATC request Mach 0.83 to Mach 0.79
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Old 21st Mar 2018, 08:11
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Good Business Sense
 
Join Date: Dec 2007
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Originally Posted by extricate
Hi,

What's your way of determining if the aircraft can meet the request instead of just winding the mach no. down and ensuring it stays above min. man speed?

Thanks
It was a while ago but I think my ballpark was 5kts per 0.01 mach ... and with each 0.01 Mach you'll lose 1 minute per hour on the ETAs .... instant calc and you don't have to touch the FMC etc
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