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Thread: What is a 777-200 Vref speed at a typical landing weight?
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Old 6th May 2010, 06:34
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Old Smokey
 
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A very nice answer by eckhard

As the original question asked for a "typical" Vref, Boeing use a default figure of 130 KIAS for FMC purposes, until modified by the pilot. I'm not going to argue with Boeing for what they consider a "typical" figure.

No need to interpolate, for the normal Flaps 30 Vref, using Metric Tonnes for weight, apply the following formula -

Vref30 = SQR(Landing Weight in Tonnes / 250) X 151

Regards,

Old Smokey
Last edited by Old Smokey; 6th May 2010 at 06:52.
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