Hillson Helvellyn
| Hillson Helvellyn | |
|---|---|
| Role | Two-seat training monoplane |
| National origin | United Kingdom |
| Manufacturer | F Hills & Sons |
| Designer | Norman Sykes |
| First flight | 1939 |
| Number built | 1 |
|
| |
The Hillson Helvellyn was a 1940s British two-seat training monoplane designed by Norman Sykes and built by F Hills & Sons of Trafford Park.[1][2]
Design and development
With the prospect of war and the requirement for the Royal Air Force to train pilots the company decided to design a small basic trainer that could be built quickly and cheaply.[3] The Helvellyn was a mid-wing monoplane with two tandem open cockpits and powered by a 90 hp (67 kW) Blackburn Cirrus Minor I piston engine.[2] It had a conventional landing gear but was designed to be fitted with a tricycle landing gear.[3]
Designed by Norman Sykes and built at Trafford Park in Manchester in 1939, only the prototype registered G-AFKT[4] was completed. With an ample supply of de Havilland Tiger Moths and Miles Magisters and a lack of interest from the RAF development was stopped in 1940 and the prototype was used by the company as a liaison aircraft particularly between Barton and Ispwich.[2] It was dismantled in November 1942.[2]
Specifications
Data from [2]British Civil Aircraft since 1919 Volume 3
General characteristics
- Crew: 2
- Length: 22 ft 0 in (6.71 m)
- Wingspan: 33 ft 0 in (10.06 m)
- Empty weight: 900 lb (408 kg)
- Gross weight: 1500 lb (680 kg)
- Powerplant: 1 × Blackburn Cirrus Minor I, 90 hp (67 kW)
Performance
- Cruise speed: 110 mph (176 km/h)
References
Bibliography
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
- Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 3. London: Putnam. ISBN 0 370 10014 X.