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  • Part I

    Westland Helicopters Part II

    1934: Cierva C-29 Five seat gyroplane produced for Cierva, a single prototype was built but never progressed beyond the ground running phase due to ground resonance for which no remedy could be found.
    Cierva C-29

    February 5,1935: Cierva CL-20 Two seat gyroplane built for Cierva and Le Pere. Development abandoned due to threat of WWII

    Rotor diameter: 9.75 m
    Length: 6.17 m
    Weight: 636 kg
    Power: 1 Pobjoy Niagra S (90 hp)
    Cierva CL-20

    Note: The above two projects were undertaken at a time when the Company's main activity was concerned with fixed wing aircraft. It does however indicate an early interest in rotorcraft within the Westland organisation.

    Westland Heritage

    January 10,1947: Westland signed a licence agreement with United Aircraft Corporation to manufacture the Sikorsky S-51. This event signalled Westland's move into the helicopter business.

    October 5,1948: WS-51 Dragonfly Westland built version of the Sikorsky S-51
    Rotor diameter: 14.63 m
    Length: 17.54 m
    Weight: 2004 kg - Max.2675
    Power: 1 Alvis Leonides 50 (540 hp)
    Range: 482 Km
    Acommodation: Pilot plus 4
    No.Built: 149
    WS-51 Dragonfly

    November 12,1952: WS-55 Whirlwind Westland built version of the Sikorsky S-55, used for Search and Rescue, Transport and Anti-submarine duties.

    Rotor diameter: 16.15 m
    Length: 18.94 m
    Weight: 2415 kg - Max.3265
    Power: 1 Pratt & Whitney Wasp R-1340-40(600hp) or One Wright Cyclone R-1300-3 (700hp)
    Range: 483 Km
    Acommodation: 2 pilots plus 10
    No.Built: 289
    WS-55 Whirlwind

    August 23,1955: Widgeon A five seat general purpose helicopter involving major re-design of the WS-51, including cabin, metal rotor blades and re-engine.

    Rotor diameter: 14.99 m
    Length: 17.72 m
    Weight: 1960 kg - Max.2676
    Power: 1 Alvis Leonides 521/1 (520hp)
    Range: 499 Km
    Acommodation: Pilot plus 4
    No.Built: 15

    May 17,1957: WS-58 Wessex (HAS Mk1) A general purpose and anti-submarine helicopter, using the Sikorsky S-58 airframe and transmission, modified to accept a turboshaft engine.

    Rotor diameter: 17.07 m
    Length: 20.04 m
    Weight: 3446 kg - Max.5715
    Speed : Max. 212 Km/h
    Power: 1 Napier Gazelle 161 (1450 hp)
    Range: 1038 Km
    Acommodation: Pilot plus 3 (ASW)
    No.Built: 167
    WS-58 Wessex

    June 15,1958: Westminster A single rotor transport helicopter research vehicle, Wholly funded by Westland based on the Sikorsky S-56 rotor and transmission system.

    Rotor diameter: 21.95 m
    Length: 26.44 m
    Weight: 9635 kg - Max.14965
    Speed : 241 Km/h
    Power: 2 Napier Eland E229A turboshaft engines (3,150hp)
    Range: 241 Km
    Acommodation: 2 pilots plus 45
    No.Built: 2

    February 28,1959: WS-55 Whirlwind (Series 3, HAR 9 & HAR 10) The installation of a single Rolls-Royce Gnome turboshaft engine into the Whirlwind airframe represented a considerable improvement, used primarily in the SAR role.

    Rotor diameter: 16.15 m
    Length: 18.94 m
    Weight: 2486 kg - Max.3538
    Speed : 175 Km/h
    Power: 1 Rolls-Royce Gnome H-1000 turboshaft (1050 hp)
    Range: 514 Km
    Acommodation: 2 pilots plus 10
    No.Built: 75
    WS-55 Whirlwind

    Continue with Westland Timeline Part III

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