Westland Wyvern
The Westland Wyvern was a carrier-based fighter-bomber of the British manufacturer Westland, which was designed as an all- metal low-wing monoplane with retractable spur wheel chassis. She had a turboprop engine that drove two counter-rotating four-bladed coaxial propellers.
The prototype and pre-series 10 ( TF.Mk 1) were equipped with the 24-cylinder H- engine Eagle Rolls -Royce with 3,500 hp, the cell was already designed to receive a turboprop drive, but the first was not available. The first flight took place on 12 December 1946.
More pre-production aircraft ( TF.Mk 2) then had the turboprop Rolls- Royce Clyde ( 4,500 hp) Armstrong Siddeley Python. The version with the Python turbine first flew on January 18, 1949, the version with the Clyde turbine on March 22, 1949. Was also a two-seat trainer version ( TF.Mk 3) developed. The first flight with a Python -2- turbine took place on 16 February 1950.
The series machines ( S.Mk 4) had a turbine Python 3 with 3,670 hp and 250 kp residual thrust. The Westland Wyvern was put into service in May 1953. Westland Wyvern were used only during the Suez crisis in the fight and remained until March 1958 at the service.