P.74 rotor blade aerofoil tests were carried out on a Sikorsky R-4B, converted to drive a whirling arm on which the test sections were mounted.
From Cliff Minney comes this photograph and drawing of the Hoverfly I used for testing rotor blades with tip jets. The aircraft, KK990, is in the well-protected rotor spinning bowl at Luton and was used for static tests only, no attempt being made to fly it.

Самолёты на фотографии: Aircrafts on the photo: Sikorsky R-4 Hoverfly - СШАUSA - 1942

From Cliff Minney comes this photograph and drawing of the Hoverfly I used for testing rotor blades with tip jets. The aircraft, KK990, is in the well-protected rotor spinning bowl at Luton and was used for static tests only, no attempt being made to fly it.

Самолёты на фотографии: Aircrafts on the photo: Sikorsky R-4 Hoverfly - СШАUSA - 1942

The photograph was sent in by Mr.L.B. Parkinson and depict the Fane F.1/40 Flying Observation Post. The design is basically that of the Comper CF-1 Scamp whose development was cut short by the death of Nick Comper in June 1939.

Самолёты на фотографии: Aircrafts on the photo: Fane F.1/40 - ВеликобританияUnited Kingdom - 1941

Captain Gerald Fane continued development at Fane Aircraft in Norbury, near Croydon, and it emerged with a single-boom fuselage in place of the twin-boom Scamp. First flight was in March 1941 and serial T1788 was allocated but the Air Ministry adopted the Taylorcraft D as the standard AOP type. It was not flown under RAF marks which appear to have related to the Scamp.

Самолёты на фотографии: Aircrafts on the photo: Fane F.1/40 - ВеликобританияUnited Kingdom - 1941