The F4U-1 Corsair "Birdcage" was primarily designed by American aircraft manufacturer Vought. It was conceptualized upon the request of the U.S. Navy for a carrier fighter aircraft proposal in 1938. The Corsair which means "pirate" is famous for its inverted gull wing, which was incorporated to provide enough ground clearance for its massive 4-meter propeller. The F4U-2 was produced upon the request of the U.S. Navy in November 1941. The Navy required a radar-equipped version of the aircraft's predecessor. As Vought wasn't able to accommodate this request, the project was taken over by the Naval Aircraft Factory, resulting in the new variant equipped with a radar dome. This dome was placed on the aircraft's outboard .50 caliber machine gun. The same technology sparked the beginning of the United States' night fighting tactics during WWII.