Originally Posted by
john_tullamarine
it's not mandatory to rotate at that calculated speed.
Depends on whether you want to make the scheduled distance or not ... critical length runway with close-in obstacles might make the plan uncomfortable, perhaps ?
That's not what is taken into the calculations, Vr is the MINIMUM speed to START the action that results in rotating, you must stay on the rwy till the A/C is under control then rotate. There would be enough Rwy left in all but extreme cases otherwise it wouldn't be a balanced field length. I recently did a LR45 rating & my Sim buddy one day panicked when he had a V1 cut so he just reefed it off the deck & we all died!....I've come back as a shieler this time....lolol