On our nice new fleet of minibuses, we are up to a Tmax flex of ISA+60 so a SL T/o at Tmax Flex gives a Flex of 75 degrees and an N1 of circa 78% (FF of appx 2x2800kg/hr). As the ac transitions from the T/o to the Clb Phase, the N1 increases (40% to 25% i guess) to circa 84%. Poetry in motion!!
Cheers
mcdhu