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Old 8th May 2012 | 14:32
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ImbracableCrunk
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Joined: Oct 2006
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From: Ankh Morpork, DW
On the 737-9W, it looks like Vref40 varies from 126% to 128% above the 1-g stall speed. At F30, it's 132% to 134%.

One of my Boeing books states the Vref is 123% of the 1-g stall speed. It looks like F30 is padded by ~10% and F40 by ~5%.
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