"I slow down in an F4U to dogfight eather a Ki-61 or a Zero. Now I have no way of disengaging if another Ki-61 or Zero decides to enter the fight when he now calls all the shots"
Thats basically the real point, an F4U-1 that did that would only last for so long, with a Ki-61 on its 6, its dead, so the idea that you would drop flaps, losing any speed advantage it had, and turn with them is insane. Its just what the IJ would want to see you do, in fact. You may get a few kills, but rtbing consistantly would not be in your future.