page_title: Westland Lynx
section_title: Design
hierarchical_section_title: Westland Lynx / Design
caption_attribution_description: Lynx at the top of the loop
context_page_description: The Westland Lynx is a British multi-purpose twin-engined military helicopter designed and built by Westland Helicopters at its factory in Yeovil. Originally intended as a utility craft for both civil and naval usage, military interest led to the development of both battlefield and naval variants. The Lynx went into operational usage in 1977 and was later adopted by the armed forces of over a dozen nations, primarily serving in the battlefield utility, anti-armour, search and rescue and anti-submarine warfare roles.
  The Lynx is a fully aerobatic helicopter with the ability to perform loops and rolls. In 1986, a specially modified Lynx set the current Fédération Aéronautique Internationale's official airspeed record for helicopters at 400.87 km/h, which remains unbroken as of 2019.
  Several land and naval variants of the Lynx have been produced along with some major derivatives. The Westland 30 was produced as a civil utility helicopter; it was not a commercial success and only a small number were built during the 1980s.
context_section_description: The Lynx is a multi-purpose twin-engine battlefield helicopter, of which specialised versions have been developed for both sea and land-based warfare. A distinguishing feature between early and later aircraft is the undercarriage: early Army versions of the Lynx were equipped with skids, while the Naval and later models have been outfitted with wheels, a requirement for easy ground handling on the deck of a warship. Early versions of the Lynx were powered by a pair of Rolls-Royce Gem turboshaft engines and had a four-blade rotor, mounted on a rigid titanium monobloc rotor head of the kind pioneered by the MBB BO105 a few years earlier. The innovative blade design comprised a honeycomb sandwich structure made out of composite material. For shipboard stowage, both the rotor blades and tail can be folded. Lag dampers were incorporated but these are not required in flight (owing to the rigidity of the monobloc rotor head). In flight, the main rotor is kept at a constant speed, simplifying aircraft control; the rotor also features a vibration absorption system.
  The Lynx is an agile helicopter, capable of performing loops and rolls, and of attaining high speeds. The agility of the type led to its use as an aerial display aircraft, having been operated by the Blue Eagles and Black Cats helicopter display teams. The efficiency of the main rotor, as well as the overall top speed of the Lynx, was substantially improved with the adoption of BERP rotor blade technology. During the 1990s, the hot-and-high performance of the type was considerably boosted in the later Super Lynx 200 series, at which point the type's Gem engines were replaced with the newer LHTEC T800 turboshaft engine with associated FADEC system; the Lynx can also maintain a good level of performance under moderate icing conditions. The FADEC controls eliminated the requirement for a throttle or manual speed selection switches, further simplifying flight control. Later aircraft feature automatic stabilisation equipment; functions such as auto-hover are installed on some Lynx.
  Various avionics and on-board systems are integrated on the Lynx in order to perform differing mission profiles. Several operators have equipped their Lynx with BAE Systems' Seaspray surveillance radar to provide for a surface search capability, which is used in maritime patrol, search and rescue, and other mission profiles. British Army models are equipped with a Marconi Elliot automatic flight control system capable of performing automatic three axes stabilisation. The integration of both avionics and weapons systems is customised for each Lynx batch to customer specifications and requirements. Most of the installed sensors and avionics are typically integrated with the aircraft's avionics management system (AMS), from where they can be managed by either pilot; sensors such the optional nose-mounted FLIR can be set up to directly cue the weapon systems. Functions such as navigation and communications are also tied into the AMS, with information from these systems displayed to the pilots on interchangeable integrated display units in the cockpit. The Lynx is considerably easier to service and maintain than the AgustaWestland Apache.
  The Lynx features a two-man cockpit for a pilot and observer sitting side-by-side; the British Army typically operates their fleet with a three-man crew, a door gunner being the third member. The cabin, located behind the cockpit, is accessed through a pair of large sliding doors on each side of the fuselage; it can accommodate up to ten equipped troops, depending upon seating configuration. An alternative configuration houses radio equipment in the cabin area when the aircraft is being used in the airborne command post role; the cabin can also be used to house additional fuel tanks for conducting long distance missions and ferry trips. The Lynx can perform a wide variety of mission types, including anti-submarine and anti-surface warfare, vessel replenishment, search and rescue, airborne reconnaissance, armed attack, casualty evacuation and troop transport; accordin
caption: Lynx at the top of a loop
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