At a199, SW runway, Auto takeoff on, 6 x 1000 loadout
With no flaps, succesful takeoffs @ 25%,50%,75% fuel.
Hit tree @ 100 %
With flaps at default (2 notches) succesful @25%. Hit tree at 50%
and up.
Fix could be as simple as removing trees at end of runway. In manual take off you may be able to steer to the left and buy some more room.
I'll try some manual takeoffs tonight on my real AH computer with a joystick.