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. In between if you have a second failure, you go down.
So before a two engine ferry, you boroscope the two good engines. You also clean the ADP exhaust ducts (because they run continuosly), make sure the nose wheels are more than 50pc tread remaining. You offload everything, no containers, no catering, no cabin crew, no water. At the end of the runway, you run up the good wing engine to take off for a minute, then back to idle. You then run up Nbr 2 to take off for a minute, then release the brakes. You incresae the power on the good wing engine slowly as the aircraft accelerates and the rudder authority increases. At 2000ft in the climb you start breathing again.
Max fuel is around 18 tonnes, which gives you about 90 mins range.