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Hawker Cygnet
United Kingdom — single-engine two-seat ultralight biplane aircraft


Archive Photos ¹


Hawker Cygnet (G-EBMB) on display (c.1994) 1994 at the Royal Air Force Museum London, Hendon Aerodrome, London, England, United Kingdom (Photo by John Shupek copyright © 2002 Skytamer Images)

Overview ²


  • Hawker Cygnet
  • Role: light competition aircraft
  • Manufacturer: Hawker Engineering Co.
  • Designer: Sydney Camm
  • First flight: 1924
  • Number built: 2

The Hawker Cygnet was a British ultralight biplane aircraft of the 1920s.

Background ²


In 1924, the Royal Aero Club organized a Light Aircraft Competition. £3000 was offered in prizes. An entry was made by Hawker Aircraft, which was a design by Sydney Camm, the Cygnet. Camm had joined Hawker the previous year. Two aircraft were built (G-EBMB) and (G-EBJH) and were entered in the competition, held in 1924 at Lympne Aerodrome, by T. O. M. Sopwith and Fred Sigrist. The aircraft were flown by Longton and Raynham and came in 4th and 3rd places respectively. In 1925, G-EBMB was entered again in the 100 mi (161 km) International Handicap Race, this time flown by George Bulman, who won at a speed of 75.6 mph (121.7 km/h). At the same meeting, the Cygnet came 2nd in the 50 mi (80 km) Light Aeroplane Race. In 1926, both aircraft were entered in the competition piloted by Bulman and Flying Officer Ragg, taking first and second place respectively.

Design ²


The aircraft were of wood and fabric construction, the fuselage being four longerons strutted in the fashion of a Warren girder. The wing was two box spars with Warren truss ribs. Initially the two aircraft were powered one by an Anzani and the other by an ABC Scorpion (both opposed twin cylinder engines). In 1926 the engines in both Cygnets were changed to Bristol Cherub III another two-cylinder engine. The airframe weighed a remarkably low 270 lb, and its weight when empty was only 373 lb.

History ²


Cygnet (G-EBMB) was kept by Hawker in storage until 1946, when it was refurbished and reassembled at Hawker's Langley Aerodrome. It was later transferred to their new facility at Dunsfold, where it stayed, coming out for various displays and airshows, until 1972, when it was transferred to the Royal Air Force Museum at Hendon. More recently it has been transferred to its site at RAF Cosford in Shropshire, where it can now be seen. An airworthy replica is on display at the Shuttleworth Collection, Old Warden, Bedfordshire.

Specifications ³


General Characteristics

  • Type: Two-seat lighting sporting aircraft
  • Structure

    • All-wooden construction with fabric covering.
    • Rectangular fuselage section with domed fairing.
    • Folding wings with full-span camber changing flaps with drooping ailerons.
    • Cantilever tail unit

    Manufacturers

    • H.G. Hawker Engineering Company, Ltd., Kingston

    Power Plant

    • 34 hp 1,100 cc British Anzani two-cylinder engine.
    • 34 hp ABC Scorpion two-cylinder engine.
    • 34 hp Bristol Cherub III two-cylinder engine.

    Dimensions

    • Wingspan: 28 ft 0 in
    • Length: 20 ft 5 in
    • Height:5 ft 10 in
    • Wing area:165 ft²
    • Width (folded): 8 ft 10 in

    Weights (Cherub engine)

    • Empty: 373 lb
    • Loaded: 950 lb

    Performance (Cherub engine)

    • Maximum speed: 82 mph at S/L
    • Climb: 11 minutes 20 seconds to 5,000 feet.
    • Ceiling (absolute): 8,900 ft

    References


    1. Photos: John Shupek, Copyright © 2002 Skytamer Images. All Rights Reserved
    2. Wikipedia, the free encyclopedia,
    3. Mason, Francis K. The Hawker Cygnet, Hawker Aircraft Since 1920 (3rd revised edition). London: Putnam Aeronautical Books, 1991. ISBN 1-55750-351-6. pages 108-111

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