page_title: Panavia Tornado
section_title: Variable-sweep wing
hierarchical_section_title: Panavia Tornado / Design / Variable-sweep wing
caption_attribution_description: English: Italian Air Force Tornado at the 2014 Rome International Air Show
context_page_description: The Panavia Tornado is a family of twin-engine, variable-sweep wing multirole combat aircraft, jointly developed and manufactured by Italy, the United Kingdom, and West Germany. There are three primary Tornado variants: the Tornado IDS fighter-bomber, the suppression of enemy air defences Tornado ECR and the Tornado ADV interceptor aircraft.
  The Tornado was developed and built by Panavia Aircraft GmbH, a tri-national consortium consisting of British Aerospace, MBB of West Germany, and Aeritalia of Italy. It first flew on 14 August 1974 and was introduced into service in 1979–1980. Due to its multirole design, it was able to replace several different fleets of aircraft in the adopting air forces. The Royal Saudi Air Force became the only export operator of the Tornado in addition to the three original partner nations. A tri-nation training and evaluation unit operating from RAF Cottesmore, the Tri-National Tornado Training Establishment, maintained a level of international co-operation beyond the production stage.
context_section_description: In order for the Tornado to perform well as a low-level supersonic strike aircraft, it was considered necessary for it to possess good high-speed and low-speed flight characteristics. To achieve high-speed performance, a swept or delta wing is typically adopted, but these wing designs are inefficient at low speeds. To operate at both high and low speeds with great effectiveness, the Tornado uses a variable-sweep wing. This approach had been adopted by earlier aircraft, such as the American General Dynamics F-111 Aardvark strike fighter, and the Soviet Mikoyan-Gurevich MiG-23 fighter. The smaller Tornado has many similarities with the F-111, however the Tornado differs in being a multi-role aircraft with more advanced onboard systems and avionics.
  The level of wing sweep (i.e. the angle of the wings in relation to the fuselage) can be altered in flight at the pilot's control. The variable wing can adopt any sweep angle between 25 degrees and 67 degrees, with a corresponding speed range for each angle. Some Tornado ADVs were outfitted with an automatic wing-sweep system to reduce pilot workload. When the wings are swept back, the exposed wing area is lowered and drag is significantly decreased, which is conducive to performing high-speed low-level flight. The weapons pylons pivot with the angle of the variable-sweep wings so that the stores point in the direction of flight and do not hinder any wing positions.
  In development, significant attention was given to the Tornado's short-field take-off and landing (STOL) performance. Germany, in particular, encouraged this design aspect. For shorter take-off and landing distances, the Tornado can sweep its wings forwards to the 25-degree position, and deploy its full-span flaps and leading edge slats to allow the aircraft to fly at slower speeds. These features, in combination with the thrust reverser-equipped engines, give the Tornado excellent low-speed handling and landing characteristics.
caption: Deployed swing wings
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