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Old 21st Jan 2020, 12:33
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bean
 
Join Date: Jun 2001
Location: britain
Posts: 684
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VC10 increasing Vmo above 20000 feet

According to charts I have recently downloaded the VC10s vmo was 317 knots at 20000 feet, thereafter increasing to 329 kts 11000 feey later
Why would the vmo increase when before it was decreasing.
Opinions and education welcome
Thanks
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