PPRuNe Forums - View Single Post - B737 Classic Runway Analysis max weights versus QRH speeds for light weights.
Old 19th May 2007, 14:49
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BOAC
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Be wary of the Vr which SHOULD be higher at a higher than ambient assumed temperature due to less vertical thrust component. AFAIK the QRH speeds are for full power. The safest way (IMO) is to take the max assumed temperature available and use those speeds (assuming your weight is below that table weight, of course). You also avoid the pitfalls of ASD etc and book shuffling. She will certainly rotate at that Vr, and V1 will be well on the safe side. All this assumes you are not taking off on coral, of course!
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