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Old 5th Apr 2012, 00:31
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Poire
 
Join Date: Jul 2011
Location: Over Chibougamau
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I use a trick since my 727 days to roughly find the Vref:
Gross weight divided by 3 then add 70 or 65 (200/300 and 300ER, respectively).
It gives you a very good approximation.
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