page_title: Bristol Sycamore
section_title: Specifications (Mk.4 / HR14)
hierarchical_section_title: Bristol Sycamore / Specifications (Mk.4 / HR14)
caption_attribution_description: English: A Bristol Sycamore Helicopter, as photographed by Paul Hadfield during his time in the HM Forces.
context_page_description: The Bristol Type 171 Sycamore was an early helicopter developed and built by the helicopter division of the Bristol Aeroplane Company. The name refers to the seeds of the Sycamore tree, Acer pseudoplatanus, which fall with a rotating motion. It has the distinction of being the first British helicopter to receive a certificate of airworthiness, as well as being the first British-designed helicopter to be introduced by and to serve with the Royal Air Force.
  Typically capable of seating up to three passengers, the type was often used as a transport for both passengers and cargo alike. In RAF service, the Sycamore was normally used in the search and rescue and casualty evacuation roles. The type proved the value of rotorcraft to easily traverse inhospitable or otherwise inaccessible terrain; the Sycamore made valuable contributions to British military activities during the Malayan Emergency, the Cyprus Emergency, and the Aden Emergency, in addition to other operations.
  In addition to its British military service, various models of the Sycamore were produced and operated by a number of users, including overseas military operations and civil customers.
context_section_description: Data from 
  General characteristics
  Crew: two
  Capacity: accommodation for three passengers
  Payload: 1,000 lb (454 kg)
  Length: 61 ft 1.3 in (18.62 m)
  Height: 13 ft 10.6 in (4.23 m)
  Empty weight: 3,810 lb (1,728 kg)
  Gross weight: 5,600 lb (2,540 kg)
  Powerplant: 1 × Alvis Leonides piston engine, 550 hp (410 kW)
  Main rotor diameter:  48 ft 7 in (14.8 m)
  Performance
  Maximum speed: 132 mph (212 km/h, 115 kn)
  Range: 330 mi (531 km, 290 nmi)
  Endurance: 3½ hours
caption: The interior of a Sycamore
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