![]() ![]() The wingtip fuel tanks increased the rate of roll of the aircraft, a pleasant side effect. There was no space in the wings of the aircraft for fuel tanks, so the fuel tanks were built on the wingtips of the plane. ![]() The XF9F-2 prototype first flew on 21 November 1947, and it was powered by the Pratt & Whitney J42 the J42 was a license-built Rolls-Royce RB.41 Nene engine, which was chosen over the Allison J33 and Westinghouse J34. The G-79 was designated as the XF9F-2 by the Navy. BuAer decided not to cancel the G-75 project as they normally would have, but instead changed the contract to two prototypes of the G-79. Grumman soon realized that the G-75 was not going to be a successful design, and the project was ended in favor of the G-79 project. The BuAer designation for the G-75 was XF9F-1, and it was developed as a backup to the F3D Skyknight (in case the F3D project was unsuccessful). Despite losing the competition, the Navy Bureau of Aeronautics (BuAer) still contracted Grumman for two prototypes of the G-75 on 11 April 1946. On 3 April 1946, the Douglas F3D Skyknight was selected over the Grumman G-75 in a competition for a jet-powered night fighter for the US Navy. At Grumman, studies for the development of a jet-powered fighter aircraft began towards the end of World War 2. ![]()
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