F4U is very different. First of all, the wings of the aircraft are equipped with inverted gull wings. Second, F4U was using the output of the largest piston engine - Pratt & Whitney R-2800, power of 2000 horsepower, and most of the aircraft over the same period only 1000 horsepower engine. These features have also become a focus of attention of the F4U. In October 1, 1940, the prototype XF4U-1 in a test flight on record at the time of a flight speed record of 405 mph (652km/h), became the first to exceed 400 miles per hour (640km/h) American fighter (in fact, the test of the XP-38 in the earlier time after breaking the record, but then refresh XF4U-1 the record). However, the nose is too long to make the driver's forward vision is not good, after repeated changes are almost trying to improve this problem. At the same time, due to the low curvature of the wings, limiting the pilot's judgment, so that pilots in the landing if the improper operation (such as the time to open the aircraft landing gear is wrong), it is easy to accidents.