The prototype aircraft first flew on 21 August 1974. All development aircraft were built on production jigs; the program remained on time and to budget throughout. The Hawk T1 entered RAF service in late 1976. The first export Hawk 50 flew on 17 May 1976. This variant had been specifically designed for the dual-role of lightweight fighter and advanced trainer; it had a greater weapons capacity than the T.1.This project was funded by the company as a private venture, in anticipation of possible RAF interest. The design was conceived of as having tandem seating and a combat capability in addition to training, as it was felt the latter would improve export sales potential. By the end of the year HSA had submitted a proposal to the MOD based on the design concept, and in early 1970 the RAF iss