PPRuNe Forums - View Single Post - Variation of VR/V2 with temperature?
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Old 8th June 2012 | 11:05
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HazelNuts39
 
Joined: Jul 2009
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From: France - mostly
keith,

The speed values in the table are rounded to the nearest knot, so they are only accurate to within +/- 0.5 kt at best. At high weight (close to WAT-limit hence minimum thrust/weight) V2 is 1.2 Vs for both flap settings and conditions A through F.

I find it difficult to make a general statement on Vmu. If it is only limited by the maximum body angle it is a function of thrust/weight due to the vertical component of thrust. However, very often elevator power (i.e. the minimum speed at which the nosewheel can be lifted off the runway) enters into the determination of Vmu, in particular the all-engines Vmu. The relations between Vmu, Vr and V2 are functions of thrust/weight, so it's getting rather complex.

Last edited by HazelNuts39; 8th June 2012 at 11:20. Reason: AEO Vmu
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