Development
The XA2J was intended as a turboprop-powered derivative of the AJ Savage, with the design as initially proposed in December 1947 was a simple modification of the Savage, with extensive use of components of the earlier aircraft. The design gradually evolved, however, to improve performance and increase compatibility with operations from aircraft carriers, as it was recognised that the AJ Savage was deficient in performance and was a less than satisfactory carrier plane.
The A2J was essentially an "enlarged" AJ Savage with the two reciprocating engines replaced with two Allison T40 turboprop engines and removal of the tail-mounted turbojet. Like the AJ, it was a high-winged monoplane with unswept wings. The wings were fitted with leading edge stats and large trailing edge flaps and folded outside of the engine nacelles to ease storage aboard ship.. It had a crew of three; pilot, co-pilot/bombardier and gunner who sat in a pressurised cabin in the nose of the aircraft. Up to 10,500 pounds (4,800 kg) of bombs could be carried in a large enclosed bomb-bay in the center fuselage, while the planned defensive armament was a remotely controlled tail turret with two 20mm cannon.
Construction of two prototypes started 1 October 1948, but due to delays developing the engines, the first flight was not until 4 January 1952. The competing XA3D, the prototypes of which were ordered the year after construction had begun on the XA2J prototypes, first flew in October 1952. The A3D had far superior performance, and that doomed the XA2J.
The root cause for the failure of the XA2J was the protracted development and poor reliability of the Allison T40 engines. The T40 engine was an advanced engine design of joining two T38 turboprop engines to drive two large contra-rotating propellers through a combining gearbox, proved to be very unreliable. The T40 engine was also used in the developmental Douglas A2D Skyshark, and the Republic XF-84H Thunderscreech. After a number of engine related mishaps the XA2J project was abandoned and the second prototype was never flown.
Read more about this topic: North American XA2J Super Savage
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