F4U Corsair / Boyington Black Sheep SquadronF4U Corsair airplane model. The F4U was one of the most successful fighters of WWII. It achieved a claimed 11. 3 to 1 'kill ratio' in the Pacific. It was fast, but had some handling problems, and early versions tended to 'bounce' upon landing because of their stiff undercarriage. Therefore, it was at first restricted to land based marine units and equipped all USMC fighter units in the Pacific in the second half of 1943. After some modifications, it