__NOTOC__ The Henderson-Glenny H.S.F.II Gadfly was a British single-seat low-wing monoplane designed by K.N. Pearson and built by Glenny and Henderson Limited at Byfleet, Surrey, England in 1929.

Design and development

The Gadfly was a low-wing monoplane with a fixed conventional landing gear and an open single seat cockpit. The first aircraft, powered by a

ABC Scorpion II The ABC Scorpion is a 30 hp (22 kW) two-cylinder aero engine designed by British engineer Granville Bradshaw for use in light aircraft. The engine was built by ABC Motors Limited and first ran in 1921.Gunston 1989, p.9. Variants ;S ...

engine, first flew at Brooklands in April 1929. It was designated the Gadfly I and was registered ''G-AAEY''. It was fitted with Pearson rotary ailerons and re-designated Gadfly II when it achieved a world altitude record of in the 200 kg class on 16 May 1929 piloted by G.L.P. Henderson. The second aircraft was a Gadfly II ''G-AARJ'' which first flew in August 1929 and was exported to Canada, where it was damaged beyond repair at Kitchener, Ontario, on 25 August 1931. The final aircraft was Gadfly III ''G-AARK'' which was the same as the Gadfly II but fitted with a Salmson A.D.9 radial engine. It was withdrawn from use in 1930. The first aircraft ''G-AAEY'' was last based at Wolverhampton when it was scrapped in June 1934.

Variants

;Gadfly I :

powered, one built later converted to Gadfly II. ;Gadfly II :Same as Gadfly II but fitted with Pearson rotary ailerons, one conversion and one built. ;Gadfly III : Salmson A.D.9 radial-engine-powered, one built.

Specifications (Gadfly II)

Glenny_&_Henderson_Gadfly_3-view_Aero_Digest_January,1930

References

Notes

Bibliography

* {{refend 1920s British civil utility aircraft Low-wing aircraft Aircraft first flown in 1929 Single-engined tractor aircraft