Your Corsair does not have split flaps, Look at a P40 sometime and you will see the difference. On a split flap the top of the wing stays in place and only the bottom lowers therefore the name split flap. I generally take my warbirds off by easing into the throttle without holding any elevator and pouring the coals to her when she can handle it without nosing over, let the tail come up on its own and let it run as long as you can, lift off and then do a relatively flat climb out just like a real one. Safer and looks better to. Holding elevator on take off role is a good way lift off early and snap role into the ground.