[1][2] The single-seat Gyroplane had a three-blade auto-rotating rotor fitted above the fuselage on a strutted plyon.

[1] A 90 hp (67 kW) Pobjoy Niagara radial piston engine was mounted on the fuselage nose.

[1] It had fixed tailwheel landing gear and the rear fuselage included a large dorsal fin to provide directional stability.

It was tested at Farnborough, and leased to the Royal Aircraft Establishment for research, but it was scrapped during the second world war.

[1] A two-seat A.R.IV and three-seat A.R.V were planned, but construction was stopped when Hafner was interned under Defence Regulation 18B.