Originally Posted by
yamahas3
Copied from another forum.... very interesting.
Well for the Tristar... When planning the take off there is a Vr and a V2, but no V1. You rotate at Vr, and then reach V2 at about 1000ft.
IF that were the case, why not use extra runway and wait until V2 to rotate?
On the Boeings, the magic number was clean and 210. Get clean and 210kts and you could fly single engine all day.
Max fuel is around 18 tonnes, which gives you about 90 mins range.
18 TONNES is about 40,000lbs of fuel. 90 minutes? Wow.. higher fuel burn that I ever would have estimated for the 'ten-o-lemon'.