Panavia Tornado
The Panavia Tornado is a family of twin-engine, variable-sweep wing multi-role combat aircraft, jointly developed and manufactured by Italy, the United Kingdom and Germany. There are three primary Tornado variants: the Tornado IDS fighter-bomber, the Tornado ECR SEAD aircraft 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 types 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 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. It is the only non-American-developed aircraft currently approved to carry United States nuclear weapons under NATO's Nuclear Planning Group.
The Tornado was operated by the Royal Air Force, Italian Air Force, and RSAF during the Gulf War of 1991, in which the Tornado conducted many low-altitude penetrating strike missions. The Tornados of various services were also used in the Bosnian War, Kosovo War, Iraq War, in Libya during the 2011 Libyan civil war, as well as smaller roles in Afghanistan, Yemen, and Syria. Including all variants, 990 aircraft were built.
Development
Origins
During the 1960s, aeronautical designers looked to variable-geometry wing designs to gain the maneuverability and efficient cruise of straight wings with the speed of swept wing designs. The United Kingdom had cancelled the procurement of the BAC TSR-2 tactical strike and reconnaissance aircraft in 1965 and then—in 1967—the US General Dynamics F-111K aircraft that was supposed to fulfil the same role, and was still looking for a replacement for its Avro Vulcan strategic bomber and Blackburn Buccaneer strike aircraft. Britain and France had initiated the BAC/Dassault AFVG project in 1965, but this had ended with French withdrawal in 1967. Britain continued to develop a variable-geometry aircraft similar to the proposed AFVG, and sought new partners to achieve this. West German EWR with Boeing then with Fairchild-Hiller and Republic Aviation had been developing design studies of the swing-wing EWR-Fairchild-Hiller A400 AVS Advanced Vertical Strike from 1964 to 1968.In 1968, West Germany, the Netherlands, Belgium, Italy and Canada formed a working group to examine replacements for the Lockheed F-104G Starfighter multi-role fighter-bomber, initially called the Multi Role Aircraft , later renamed as the Multi Role Combat Aircraft . As the partner nations' requirements were so diverse, it was decided to develop a single aircraft that could perform a variety of missions that were previously undertaken by a fleet of different aircraft. Britain joined the MRCA group in 1968, represented by Air Vice-Marshal Michael Giddings, and a memorandum of agreement was drafted between Britain, West Germany, and Italy in May 1969.
By the end of 1968, the prospective purchases from the six countries amounted to 1,500 aircraft. Canada and Belgium had departed before any long-term commitments had been made to the programme; Canada had found the project politically unpalatable; there was a perception in political circles that much of the manufacturing and specifications were focused on Western Europe. France had made a favourable offer to Belgium on the Dassault Mirage 5.
Panavia Aircraft GmbH
On 26 March 1969, four partner nations – United Kingdom, Germany, Italy and the Netherlands, agreed to form a multinational company, Panavia Aircraft GmbH, to develop and manufacture the MRCA. The project's aim was to produce an aircraft capable of undertaking missions in the tactical strike, reconnaissance, air defence, and maritime roles. Various concepts, including alternative fixed-wing and single-engine designs, were studied while defining the aircraft. The Netherlands pulled out of the project in 1970, citing that the aircraft was too complicated and technical for the RNLAF's preferences, which had sought a simpler aircraft with outstanding manoeuvrability. An additional blow was struck when the German requirement reduced from an initial 600 aircraft to 324 in 1972. It has been suggested that Germany deliberately placed an unrealistically high initial order to secure the company headquarters and initial test flight in Germany rather than the UK, to have a bigger design influence.When the agreement was finalised, the United Kingdom and West Germany each had a 42.5% stake of the workload, with the remaining 15% going to Italy; this division of the production work was heavily influenced by international political bargaining. The front fuselage and tail assembly was assigned to BAC in the United Kingdom; the centre fuselage to MBB in West Germany; and the wings to Aeritalia in Italy. Similarly, tri-national worksharing was used for engines and equipment. A separate multinational company, Turbo-Union, was formed in June 1970 to develop and build the RB199 engines for the aircraft, with ownership split 40% Rolls-Royce, 40% MTU, and 20% FIAT.
At the conclusion of the project definition phase in May 1970, the concepts were reduced to two designs; a single seat Panavia 100 which West Germany initially preferred, and the twin-seat Panavia 200 which the RAF preferred. The aircraft was briefly called the Panavia Panther, and the project soon coalesced towards the two-seat option. In September 1971, the three governments signed an Intention to Proceed document, at which point the aircraft was intended solely for the low-level strike mission, where it was viewed as a viable threat to Soviet defences in that role. It was at this point that Britain's Chief of the Defence Staff announced, "two-thirds of the fighting front line will be composed of this single, basic aircraft type".
Prototypes and testing
The first of fifteen development aircraft flew on 14 August 1974 at Manching, Germany; the pilot, Paul Millett described his experience: "Aircraft handling was delightful... the actual flight went so smoothly that I did begin to wonder whether this was not yet another simulation". Flight testing led to the need for minor modifications. Airflow disturbances were corrected by re-profiling the engine intakes and the fuselage to minimise surging and buffeting at supersonic speeds.According to Jim Quinn, programmer of the Tornado development simulation software and engineer on the Tornado engine and engine controls, the prototype was safely capable of reaching supercruise, but the engines had severe safety issues at high altitude while trying to decelerate. At high altitude and low turbine speed the compressor did not provide enough pressure to hold back the combustion pressure and would result in a violent vibration as the combustion pressure backfired into the intake. To avoid this effect the engine controls would automatically increase the minimum idle setting as altitude increased, until at very high altitudes the idle setting was so high, however, that it was close to maximum dry thrust. This resulted in one of the test aircraft being stuck in a mach 1.2 supercruise at high altitude and having to reduce speed by turning the aircraft, because the idle setting at that altitude was so high that the aircraft could not decelerate.
Testing revealed that a nose-wheel steering augmentation system, connecting with the yaw damper, was necessary to counteract the destabilising effect produced by deploying the thrust reverser during the landing roll.
From 1967 until 1984 Soviet KGB agents were provided details on the Tornado by the head of the West German Messerschmitt-Bölkow-Blohm planning department, Manfred Rotsch.
Two prototypes were lost in accidents, both of which had been caused by pilot error leading to two ground collision incidents; a third Tornado prototype was seriously damaged by an incident involving pilot-induced pitch oscillation. During the type's development, aircraft designers of the era were beginning to incorporate features such as more sophisticated stability augmentation systems and autopilots. Aircraft such as the Tornado and the General Dynamics F-16 Fighting Falcon made use of these new technologies. Failure testing of the Tornado's triplex analogue command and stability augmentation system was conducted on a series of realistic flight control rigs; the variable-sweep wings in combination with varying, and frequently very heavy, payloads complicated the clearance process.
Production
The contract for the Batch 1 aircraft was signed on 29 July 1976. The first flight of a production aircraft was on 10 July 1979 by ZA319 at BAe Warton. The first aircraft were delivered to the RAF and German Air Force on 5 and 6 June 1979 respectively. The first Italian Tornado was delivered on 25 September 1981. On 29 January 1981, the Tri-National Tornado Training Establishment officially opened at RAF Cottesmore, remaining active in training pilots from all operating nations until 31 March 1999. The 500th Tornado to be produced was delivered to West Germany on 19 December 1987.Export customers were sought after West Germany withdrew its objections to exporting the aircraft; Saudi Arabia was the only export customer of the Tornado. The agreement to purchase the Tornado was part of the Al-Yamamah arms deal between British Aerospace and the Saudi government. Oman had committed to purchasing eight Tornado F2s and the equipment to operate them for a total value of £250 million in August 1985, but cancelled the order in 1990 due to financial difficulties.
During the 1970s, Australia considered joining the MRCA programme to find a replacement for their ageing Dassault Mirage IIIs; ultimately the McDonnell Douglas F/A-18 Hornet was selected to meet the requirement. Canada similarly opted for the F/A-18 after considering the Tornado. Japan considered the Tornado in the 1980s, along with the F-16 and F/A-18, before selecting the Mitsubishi F-2. In the 1990s, both Taiwan and South Korea expressed interest in acquiring a small number of Tornado ECR aircraft. In 2001, EADS proposed a Tornado ECR variant with a greater electronic warfare capability for Australia.
Production came to an end in 1998; the last batch of aircraft produced going to the Royal Saudi Air Force, who had ordered a total of 96 IDS Tornados. In June 2011, it was announced that the Tornado fleet had flown collectively over one million flying hours. Aviation author Jon Lake noted that "The Trinational Panavia Consortium produced just short of 1,000 Tornados, making it one of the most successful postwar bomber programs". In 2008, AirForces Monthly called the Tornado: "For more than a quarter of a century ... the most important military aircraft in Western Europe."