Originally Posted by
stilton
My point is I’d rather be airborne
with speed in hand and altitude
beneath me
This gives me two energy options
to trade if I encounter windshear
I have some altitude to trade in case of
sink and some speed that can be
bled off in the escape maneuver
Building up excess speed past normal
VR on the runway only gives you one of these options and if the windshear is
strong enough you are still on the runway and have lost any additional energy gained
Youve lost any advantage, in fact you’re worse off than adhering to your normal VR
If You rotate at Your RTOW Vr rather than at Your actual GW Vr You will simply delay the point in space at which You get airborne but You will do so with some extra speed that will potentially be useful if, in the first few hundred feet You encounter WS such that You are likely to lose 15/20 kt, let's imagine a strong tailwind component kicking in at 300-400 ft as a result of local wind phenomena (katabatic winds or so). Anyway as You well know any WS that is likely to be induced by TS activity around the field should be avoided in first place by sitting on the ground till conditions improve.