This engine comprised two de Havilland Gipsys mounted on a common crankcase to form an air-cooled V-8.Changes were also made to the structure including increased span and chord wings and the aircraft was redesignated the DH.75A.One of the Australian aircraft, VH-UNW ex G-AAFX, was used by Amy Johnson to fly from Brisbane to Sydney in 1930 when her De Havilland Moth Jason was damaged.Major De Havilland later flew Miss Johnson to Perth in the aircraft, from where she returned to Britain by ship.In mid-1936 the engine-less airframe was sold to G. H. "Harry" Purvis, who refitted it with a Wright Whirlwind engine and used it to conduct joy flights in New South Wales.