Raoul Hafner was a young engineer who had started the design of his first aircraft in Austria in 1929. This, the R.I helicopter, flew at Aspern Airport. Vienna, in 1930 and was followed by the R.II in1931. Hafner then came to England where he designed and flew, with some success, his A.R.III gyroplane, a jump start autogyro. There then followed a series of design projects, several of which were tendered to the requirements of the earliest Air Ministry specifications for helicopters.