The Grumman F4F-4 Wildcat was a single-engine all-metal construction plane in the F4Fseries. The F4F-4 increased the number of 12.7 mm machine guns to six and was built with manually folding wings. Wingspan was decreased from 11.5 to 4.36 meters when the wings were folded, allowing 50% more aircraft to be held on a carrier. The plane’s ruggedness was also much improved. It had greater survivability when compared with the F4F-3 but had significantly lower performance characteristics.