Prototype F4U Corsairs were intended to carry small 5.2 lb anti-aircraft bombs IN the wings. 5 compartments in each wing could each hold 4 of these fragmentation bombs, for a total of 40. These were intended to be dropped into formations of enemy bombers. I don't believe this feature was included in any production Corsairs. The production models also included a tear-shaped window under the cockpit, so the pilot could line up on his target. This window was included on all F4U-1's, and also on many F4U-1A's. It was deemed unnecessary, and was deleted on later model F4U's. It was also often painted over on the planes that had this feature. Apparantly this window was the reason that none of the F4U's had floors, even though the window was deleted. As far as landing on a carrier deck, I can think of better places to be looking during landing, the floor of the cockpit would NOT be on my list! Given the nose-down attitude taken during the approach, I don't think you'd even be able to see the deck. At least not until you had cleared the tail of the carrier. That window would be about as useful for landing as a window on the floor of your car would be for parking.
