It was not armor. It was a support plate for the plexiglass. The F4u-4 that saw combat at the very end of 45 all had the support plate. An improved bulged canopy showed up at the very end. Those that saw combat had the plate.
For everyone to decide check the third picture down in this link. The plate extends 1.5 times the width of the backstrap forward into the bulged plexi. Take one of the AH F4u out, F3, zoom in and guesstamate from the side for the proportion.
http://www.livingwarbirds.com/vought-f4u-corsair-pictures.phpMy guesstamate of the AH plate is 2x the width of the backstrap after F3 and zoom.
You are talking maybe 3-4 inches at best. I doubt in game it matters. You still need to set your 6 view to look around the side of the head rest. Or do the TrackIR contortionism boogy. Bet none of you Corsair aficionados ever noticed the gunsight in the F4U1 is missing its projector lense......only a black painted metal plate.
This is as picayune as my doing hours of testing to prove the engine centerline mounted cannons in the game in real life were locked to the centerline of the engine but, HiTech allows you to tilt the cannon. In game you can adjust the elevation short of .1 degree. The dispersion modeling in the game makes the elevation adjustment a moot point past 200 yards.
Picayune.......
