The Model 28 took two forms, the first being the Model 28-70 built as a two-seat racing aircraft, slightly less powerful than the rebuilt Model 28-90. The Model 28-70 was designed to compete in the 1934 MacRobertson Air Race from Britain to Australia, but following a rebuild as the 28-90 it made a record transatlantic crossing in 1936, piloted by lames Mollison. Military development of the 28-90 (also known as Flash) proceeded with France ordering 10 as communications types. These were earmarked for the Republican side in the Spanish Civil War and delivery was stopped. The Model 28-110 was ordered by the Chinese Government in 1937.