@ Wiz,
If you encounter windshear prior to rotation, the biggest threat is runway overrun, therefore the Boeing procedure is to rotate at the actual TOW Vr, or the last 2000ft of the runway, whichever comes first.
Boeing speaks bout AT or AFTER the VR but never mind. I get the idea and it makes sense. What I can't visualize is having 2 VR on your speed scale. How doest it work? Do you insert 2 values or just one and keep the other one in mind? Kinda weird procedure. It's logical that approaching the end of the strip full steam the only viable option is to rotate and wait. Airbus is very simple in this regard, one set of speeds and that's it. GS indication is irrelevant for the lift equation but remaining runway is certainly a clue.
