Here`s what a certain airline does........
– the T/O includes clearway and on a wet rwy, can you believe it they only work on a 15 ft screen ht at the end of this! We do what they call improved clb t/o’s to get more weight off a certain rwy and to meet second segment clb requirements. We accelerate to a higher gnd speed on the rwy and then lift off “late” where there are no immediate obstacles ( 1st segment clb ) – then once airborne we already have the energy to meet 2nd segment clb ! – Clever ?