TAI TF-X

The TAI TF-X ("Turkish Fighter–Experimental") is a proposed stealth twin-engine all-weather air superiority fighter being developed by Turkish Aerospace Industries (TAI) in collaboration with BAE Systems. The aircraft is planned to replace F-16 Fighting Falcons of the Turkish Air Force and to be exported to foreign air forces. TAI CEO Temel Kotil claimed that the TF-X would make its first flight by 2025. However president of Undersecretariat for Defence Industries Ismail Demir stated that they expect the first flight by 2026. It will enter in service in 2030s.
Development.
On 15 December 2010, Turkey's Defense Industry Executive Committee (SSIK) decided to design, develop and manufacture a national next generation air-superiority fighter which would replace Turkey's F-16 fleet and operate with other critical assets like F-35 Lightning II.
In 2011, Turkey's Undersecretariat for Defense Industries (SSM), the procurement agency for Turkish Armed Forces, signed an agreement with TAI for the conceptual development of basic capabilities. TAI and TUSAŞ Engine Industries (TEI) would lead the design, entry and development processes of the fighter jet. The studies would reveal the cost of the fighter, while investigating which mechanical and electronic systems would be employed and included, and a wider perspective of the opportunities and challenges in military aviation. Funding equivalent to US$20 million was allocated for a 2-year conceptual design phase performed by the Turkish Aerospace Industries. TAI officials have stated that conceptual design phase should be complete in late 2013, with a report being prepared and submitted to the Prime Minister for the approval of development phase budget and framework. The Turkish Undersecretariat for Defense Industries (SSM) had written a letter of intent to three engine manufacturers: General Electric, Pratt & Whitney and Eurojet Turbo. Turkey plans to introduce the TF-X by 2025, having it and the F-35A comprising a dual fighter jet fleet. The TF-X is to compensate for some of the F-35's drawbacks in a close air combat. Development Phase I was expected to officially commence by the end of 2014.
In 2015, the TAI released three potential airframe configurations:
Turkish Prime Minister Ahmet Davutoğlu announced on 8 January 2015, that the TF-X will be a twin-engined fighter. The Undersecretariat for Defense Industries published its 2016 Performance Report in March 2017, where it was revealed that the final decision was to continue with the twin engine FX-1 configuration.
In December 2017, TAI released preliminary technical specifications and features of the aircraft. Some features of a 5th generation fighter projected for the TF-X are:
Jane's has described the project as "extremely ambitious".
Bid.
On 13 March 2015, the Turkish Undersecretariat for Defense Industries (SSM) officially issued a Request for Information to Turkish companies which had the capability "to perform a genuine design, development and production activities of the first Turkish fighter aircraft to meet Turkish Armed Forces' next generation fighter requirements" signalling the official start of the program. The contract for design and development of the fighter was signed between the SSM of Ministry of Turkish National Defense and Turkish Aerospace Industries Inc. on 5 August 2016. The SSM granted $1.18 bn. to Turkish Aerospace Industries to acquire necessary technologies and infrastructure for the design, testing and certification of the aircraft.
BAE Systems.
In December 2015, Turkey's Undersecretariat for Defense Industries (SSM) announced that it had chosen BAE Systems of the United Kingdom to assist with the design of the nation's next-generation air superiority fighter. The same day Rolls-Royce offered EJ200 engine technology transfer and joint-development of a derivative for the TF-X program. During the visit of the Prime Minister of the United Kingdom Theresa May to Turkey in January 2017, BAE Systems and TAI officials signed an agreement, worth about £100 million, for BAE Systems to provide engineering assistance in developing the aircraft. Following the agreement, the UK issued an open general export licence to defense companies willing to export goods, software or technology to Turkey.
Engine.
On 20 January 2015, ASELSAN of Turkey announced that it had signed a memorandum of understanding with Eurojet, the manufacturer of the EJ200 engine used in the Eurofighter Typhoon. The announcement also stated that a derivative of the EJ200 will be used in the TF-X program. The two companies will additionally collaborate and co-develop engine control software systems and engine maintenance monitoring systems. Turkey's selection of the EJ200 evidenced TAI's intention to use supercruise capability. In May 2017, Rolls-Royce established a joint venture with the Kale Group of Turkey to develop and manufacture engines for the project. Another competitor is TRMotor Power Systems Inc. established in April 2017 by BMC, TAI and SSTEK. On 8 November 2018, TRMotor signed a memorandum of understanding with the Presidency of Defense Industries to develop a jet engine for the TF-X project. While General Electric did not openly express interest in the TF-X project, its local partner TUSAS Engine Industries (TEI) announced that it will participate in the engine development phase. On 11 June 2018, TEI General Manager Mahmut Faruk Akşit said that they proposed a mature engine for which they had completed a commercial proposal for the infrastructure of sub-component tests for the compressor. He emphasized the advantage of GE engines over its competitors stating that they have significant OEM support whereas the collaboration between other companies were yet to thrive. TEI committed to submit all intellectual rights to the government. In October 2018, local media reported that an unknown number of initial production fighters will be equipped with General Electric F110 engines until TRMotor finalizes the national engine. On 4 March 2019, Rolls-Royce withdrew from the joint venture due to disputes over sharing of intellectual property and TRMotor involving a Qatari stakeholder.
Rostec of Russia.
Russian defense company Rostec at the Eurasia Air Show 2018 evinced an intention to join the TF-X program. In a surprise move, some Russian companies (United Engine Corporation) have also stated that they were ready to provide technology for the TF-X engine. Turkish defense officials confirmed that they are exploring this option and discussing potential cooperation models. Turkish President Recep Tayyip Erdoğan, accompanied by Russian President Vladimir Putin, were showcasing the fifth-generation Sukhoi Su-57 stealth fighter jet at the MAKS 2019 international airshow in the Moscow region on 27 August 2019.
Design.
Airframe.
Hüseyin Yağcı, TAI's chief engineer on the TF-X program, has stated that all three conceptual designs thus far feature a design optimized for low radar cross-sectional density, internal weapons bays, and the ability to supercruise, features associated with fifth-generation fighter jets.
TAI's Advanced Carbon Composites fuselage facility, which was commissioned to produce fuselages for Lockheed Martin's Joint Strike Fighter (F-35) program, has been tasked with developing an Advanced Carbon Composite fuselage for the TF-X. The Turkish Undersecretariat for Defense Industries (SSM) has also issued a tender for the development of a new lighter carbon composite thermoplastic for the TF-X fuselage.
Radar and sensors.
ASELSAN is currently developing an advanced active electronically scanned array radar which will use gallium nitride (GaN) technology for the TF-X program.
Avionics and equipment.
The TF-X will be integrated from the cockpit to accompanying UAVs (most likely the TAI Anka) through encrypted datalink connections. The aircraft will likely use upgraded variants of Aselsan's own radar warning receiver (RWR), missile warning system (MWS), laser warning system (LWS), chaff and flare management, dispensing system and digital radio frequency memory (DRFM)-based jamming system, which already deployed with the other air platforms.
Propulsion.
Prototypes will be equipped with two General Electric F110 engines until indigenous ones are manufactured for serial production by TRMotor. There are ongoing negotiations with Rolls-Royce on development of an engine for the TF-X. 