Just and observation about the P39.
The central location of the engine was actually brilliant.
Like in modern day super cars..
The issue not solved was the varying CG from the weapons selection in the nose.
Wing Guns limited roll rate though a useful option.
Before WW2 pilot strength was sufficient enough to muscle a fighter through maneuvers.
The central location on the P39 provided a different potentially better agility than front engine fighter.
Yet as all the fighters got faster mechanical tricks were employed to help maneuverability.
When approaching anywhere near 500 mph other things changed and the human body became the limiting factor.
So did every part made on a plane at same time and planes got heavier and faster.
It was interesting during the early air aces that the P39 and cousin P63 did so well against other late model Designs.
Kind of wonder what a souped up P39 would do today with modern upgrades?