The Grumman Hellcat was built to replace the earlier Wildcat. It was bigger, more powerful, faster and could carry more weapons than the Wildcat. Combined with well trained pilots, USN Hellcats won air superiority over Japanese held territory and shot down more Japanese aircraft than any other fighter. The Royal Navy, looking for better carrier planes, bought the Hellcat to replace earlier fighters and supplement newer British carrier fighters. In Fleet Air Arm hands it also proved a success and was carried by many Royal Navy Aircraft Carriers.
The Hellcat was also developed into a nightfighter with a radar pod on the starboard wing. Some Hellcat nightfighters were uparmed with a pair of 20mm cannons replacing 2 of the 12.7mm machine guns.