At the beginning of the 1950s the US Navy's standard advanced trainer was the TV-2, the naval version of the T-33A land based trainer. Though it was an effective trainer the TV-2 was not ideally suited to the navy's requirements as it lacked carrier compatibility. Lockheed had already proposed its L-245 design for an improved version of the T-33, and confident that this would prove successful, built a private venture prototype. This was known unofficially as the T-33B and first flew in December 1953. The prototype introduced a raised instructor's seat under a revised canopy, and a flight trials revealed the  need for a dorsal fin to restore longitudinal stability. Other changes were leading edge slats, a larger tail unit, and a boundary layer control system. This resulted in take off and approach speed being usefully reduced. The navy ordered the type as the T2V-1 Seastar with an arrester hook, non jettison able tip tanks, a strengthened airframe, and beefed up land gear. The first of 150 Seastar entered service 1n 1957, and in 1962 the type was redesigned T-1A. The type's service career was short because of maintenance problems. 

Propulsion

USA. Performance