Originally Posted by
FlyerJosh
Doesn't matter how short the runway at LGA is. V1 is adjusted for all criteria- weight, thrust, aircraft performance, runway condition, gradient, braking action, and runway length.
As long as you calculate V1 correctly and perform the appropriate abort/go decision and procedure in a timely manner, you will be protected (provided that the variables upon which V1 is calculated are all correct and the operating engine is producing the charted thrust).
So then runway excursions should never happen.
Of course many of the calculations come from the certification process where the pilots know they are going to have an aborted takeoff, the tires are new, the brakes are also new - and cool.
I remember a USAir 737-300 sitting in the water at LGA due to an aborted takeoff on 31 (1989 or so). As I recall, all of their calculations were correct.
The book doesn't take care of all variables in the real world.