Originally Posted by
hans brinker
I'm just a pilot so FWIW.
When I flew light business jets, Our V1 was almost always Vr. But there were plenty of longer runways where I could have "aborted" from a 100' AGL with the gear up, and easily come to a stop on that same runway.
If you are talking about a balanced T/O V1, it is simply the speed where, given the weight&weather the aircraft can come to a stop before the end of the runway, and the aircraft can continue the T/O, with 1 engine not running, and cross the end of the runway at the appropriate height, and continue climbing afterwards.... lowest V1, or maybe just run numbers for a wet runway...
V1 = Vr must be nice (no 'dead man's zone'), but when the two speeds are not the same, I thought V1 was the speed at which you have enough runway to stop in but not enough speed to fly - however many engines are running? I was always under the impression that V2/positive rate of climb is the point at which you could execute a safe return even with an engine out? But I'm not a pilot, only a reasonably well-informed enthusiast.