HAL Tejas Mk2

The HAL Tejas Mark 2, or Medium Weight Fighter or HAL MWF,[2] is a planned single-engine, delta wing, multirole fighter designed by the Aeronautical Development Agency (ADA) in collaboration with Aircraft Research and Design Centre (ARDC)[3] of Hindustan Aeronautics Limited (HAL) for the Indian Air Force (IAF). It is a further development of the HAL Tejas, or Light Combat Aircraft (LCA), programme which began in the 1980s to replace India's ageing MiG-21 fighters. The Tejas Mk 2 is being designed to replace multiple strike-fighters like SEPECAT Jaguars, Dassault Mirage-2000 & MiG-29 of Indian Air Force.[4][5][6]

Tejas Mark2 / Medium Weight Fighter/ HAL MWF
Role Multirole
National origin India
Manufacturer Hindustan Aeronautics Limited
Design group Aeronautical Development Agency, Aircraft Research and Design Centre (HAL), Defence Research and Development Organisation
First flight 2022[1] (Planned)
Primary user Indian Air Force (intended)
Developed from HAL Tejas

It has a tail-less compound delta-wing configuration with a single vertical stabilizer with closed-coupled canards to provide static instability and high manoeuverability, and is equipped with fly-by-wire systems to control instability.

There is confirmation from the chief of Aeronautical Development Agency that MWF will shed its "Tejas" stamp and get a completely new name altogether during or after its first flight.[7]

Development

Origin

In 2009, a Mark 2 was sanctioned as an improvement over Tejas Mark 1 while the current General Electric F404 engine employed by Tejas was to be replaced by a more powerful engine.

To meet the IAF's air staff qualitative requirements (ASQR), over time ADA had to make substantial changes to the basic Mk 1/Mk 1A air-frame to improve payload and performance.

Initially, it was planned to simply elongate the Tejas Mark 1 with a 0.5 m fuselage plug to accommodate more fuel, while fitting a more powerful engine with 65-100 kN of thrust.[8][9] But soon it was determined that this elongation of the air frame generated substantial amount of additional drag. Alongside that the IAF demanded at least 18 degrees per second sustained turn rate [10].

To tackle that several years of design refinement followed to improve aerodynamic performance and payload. Development of MWF was envisioned only in 2014-15 period and configuration optimization studies commenced by ADA in November 2016[11]. Its whole platform was so drastically modified that the previous Mark-2 design concept, which was just a re-engined Mark1 air frame with fuselage plug, was discarded to transform the platform to be classified as a Medium-weight class aircraft. A final configuration was worked out in September 2018 and its basic design was frozen in December. At Bengaluru, in Aero India 2019 a latest version of the originally LCA Tejas Mark2, now formally rechristened as Medium Weight Fighter, was unveiled for the first time[12].

The aircraft entered detailed design phase after that during early months of 2020[13]. Metal-cutting is set to begin in April 2021, while long lead activities towards metal cutting (like, procurement of raw material) have already begun. The ‘roll out’ of first prototype of the MWF is scheduled for August 2022 with its first flight expected in September 2023. A total of four prototypes are being planned initially.[14].


For the power-plant, the General Electric F414 and Eurojet EJ200 were evaluated. In October 2010, GE F414 was selected as the lowest bidder.[15] The final deal for 99 aeroengines worth $822 million was signed by January 2013.[16] As per the agreement, eight engines were be bought off-the-shelf, while other 91 built in India under transfer-of-technology.[15]

In 2018, IAF formally committed to inducting a total of 324 Tejas aircraft of all versions including up to 200 Medium Weight Fighters, if HAL and Aeronautical Development Agency (ADA) can deliver a quality Medium Weight Fighter in time.

MWF Programme

While the original Tejas Mark 2 concept was merely an upgrade over the Tejas Mark 1, the MWF is a whole new aircraft developed based on it to complete the need of Indian airforce as MMRCA2.0 was scrapped earlier.

The most distinguishable external features of the new jet includes retractable air-to-air refueling probe against fixed one in Mark 1 FOC, close-coupled canards, increased number of weapon stations from 7 to 11. Other minor changes include a modified spine, air-intakes, canopy shape etc. and added hardpoints on wing-tips while its cannon is now mounted at the right wing-root. [17].

MWF is also to feature an indigenous integrated life support system-onboard oxygen generation system (ILSS-OBOGS) from Defence Bioengineering and Electromedical Laboratory (DEBEL), aircraft health and usage monitoring system (HUMS) to integrate various sensors onboard Tejas Mark 2 from Defence Institute of Advanced Technology (DIAT) and a built-in integrated electro-optic electronic warfare suite among other improvements to avionics[18][19][20]. It will have an infra-red search and track (IRST) system and a missile approach warning system (MAWS).[21] An increase in payload capacity to 6,500 kg (14,300 lb) and internal fuel capacity to 3,300 kg (7,300 lb), will allow it to carry more weapons for longer range[22].


For the power-plant, the General Electric F414 and Eurojet EJ200 were evaluated. In October 2010, GE F414 was selected as the lowest bidder.[23] The final deal for 99 aeroengines worth $822 million was signed by January 2013.[24] As per the agreement, eight engines were be bought off-the-shelf, while other 91 built in India under transfer-of-technology.[23]


Design

Other than design commonalities very little major technologies has been forwarded from its predecessor Tejas Mk1/A. Instead more of its technologies are to be borrowed from whatever has been developed for the 5th Generation fighter jet program of India, AMCA. Several radar cross-section reducing measures will be incorporated in the airframe design so that a degree of frontal stealth can be achieved, including Radar-absorbent material coating and composites making up its skin, twisted air-intake ducts[25].

Propulsion

In 2008, it was announced that an in-production powerplant would have to be selected; this was required to be in the 95 to 100 kilonewton (kN) (21,000–23,000 lbf) range to execute combat manoeuvres with optimal weapons load.[26][27] After evaluation and acceptance of technical offers for both the Eurojet EJ200 and the General Electric F414, the commercial quotes were compared in detail and GE's F414 was declared as the lowest bidder. The deal covered the purchase of 99 GE F414 engines, an initial batch will be supplied directly by GE and the remainder to be manufactured in India under a technology transfer arrangement.[28][29] According to the IAF, adopting the new powerplant required a three-to-four years of redesign work.

In October 2010, General Electric F414 was selected as engine for Tejas Mk 2.[30] The final contract for 99 aeroengines worth $822 million was signed in late 2012 or early 2013[16] with an option for 49 more that could be exercised later. As per the agreement, eight engines will be bought off-the-shelf, while other 91 will be built in India under transfer of technology.[15]

The F414-GE-INS6 has dry thrust of 12,994 lbf (58 kN) and 22,000 lbf (98 kN) of wet thrust.[31] F414-GE-INS6 features a Full Authority Digital Electronic Control (FADEC) system.[32]

MWF will have increased internal fuel capacity of 3.3 tonnes, while canards create some drag, the overall aerodynamic and fuel-capacity improvements ensures a range double than that of the Tejas.[1]

Sensors and avionics

The aircraft will be equipped with a multi-sensor data fusion system which will feature an active electronically scanned array radar, infrared search and track and a missile approach warning system. It will also feature an internalized integrated electronic warfare suite. The aircraft will be designed to have network-centric warfare capacity.[33]

ADA is planning to integrate Uttam AESA radar on Tejas Mk 2 in collaboration with Electronics and Radar Development Establishment (LRDE).[34] Indian variant of Rafales are to sport Thales X-Guard fiber-optic towed decoy system and Traffic Collision Avoidance System (TCAS), which may be carried over to the MWF. [35].

Cockpit
MWF cockpit mockup at Defexpo 2020 Large Area Display.

Medium Weight Fighter's cockpit is to have a next-generation Wide Area Multifunction Display, and side-mounted control stick. [36]

The aircraft is planned to be equipped with an artificial intelligence based “optimally manned” cockpit. The cockpit will be designed such that the ground control would be able to takeover the controls of the aircraft in case the pilot becomes unconscious, after being alerted by a sensor in the helmet of the pilot.[37]

Specifications

Data from Jane's Defence Weekly[12], OnManorama[33] and Defexpo 2020[38]

General characteristics

  • Crew: 1 or 2
  • Length: 14.60 m (47 ft 11 in)
  • Wingspan: 8.50 m (27 ft 11 in)
  • Height: 4.86 m (15 ft 11 in)
  • Wing area: 44 m2 (470 sq ft)
  • Airfoil: compound less canard, delta wing designed for static instability.
  • Empty weight: 7,850 kg (17,306 lb) (expected)
  • Gross weight: 11,300 kg (24,912 lb) (expected)
  • Max takeoff weight: 17,500 kg (38,581 lb) (expected)[39]
  • Fuel capacity: 3,400 kg (7,500 lb)[1]
  • Powerplant: 1 × General Electric F414-GE-INS6 turbofan, 58.5 kN (13,200 lbf) thrust dry, 98 kN (22,000 lbf) with afterburner

Performance(expected)

  • Maximum speed: Mach 2.0
  • Range: 1,700 km (1,100 mi, 920 nmi) (minimum)
  • Combat range: 1,000–1,200 km (620–750 mi, 540–650 nmi)
  • Ferry range: 3,400 km (2,100 mi, 1,800 nmi) with 3 additional fuel tanks
  • Service ceiling: 17,300 m (50,000 ft) (expected)
  • g limits: +9/−3.5 (expected)
  • Thrust/weight: 1.00 (expected)

Armament

Avionics

  • LRDE Uttam AESA (planned)
  • DARE Unified Electronic Warfare Suite (UEWS) (planned)

See also

Related development

Related lists

References
  1. "India's Medium Weight Fighter set to fly into detail design phase". Manoramaonline. 3 February 2020. Retrieved 3 February 2020.
  2. "India's Medium Weight Fighter set to fly into detail design phase". OnManorama. Retrieved 6 February 2020.
  3. "With expected 83 Tejas MK1A orders, ARDC shapes India's upgraded fighter". OnManorama. Retrieved 7 August 2020.
  4. Krishnan, Raghu (18 May 2018). "Post upgradation Tejas' Mark-2 to become a medium weight fighter". The Economic Times.
  5. "HAL Ramps Up LCA Production and Looks to the Mk2". Aviation International News. 11 March 2019. Retrieved 8 October 2019.
  6. "Metal-cutting for single-engine Tejas fighter planes to begin in February". Hindustan Times. 8 December 2019. Retrieved 25 June 2020.
  7. https://idrw.org/to-avoid-confusion-tejas-mk2-mwf-to-get-a-new-name/#:~:text=MWF%20is%20the%20new%20Acronym,means%20'radiance'%20in%20Sanskrit.
  8. Waldron, Greg (22 January 2013). "India to obtain 99 GE F414 engines for Tejas Mk II". Flightglobal.com. Archived from the original on 22 December 2017.
  9. "F414 turbofan engines" (PDF). GE Aviation. Archived (PDF) from the original on 2 July 2017.
  10. "Tracking The Tejas: How The Tejas Mk2 Design Became The Medium Weight Fighter".
  11. [defenceupdate.in/mwf-tejas-tejas-mk2-mwf-will-important/amp/ "MWF Tejas :-Why Tejas Mk2 (MWF) Will Be Important"] Check |url= value (help).
  12. "Aero India 2019: ADA unveils Tejas AF Mk 2 Medium Weight Fighter". janes.com. Retrieved 12 September 2019.
  13. "India's Medium Weight Fighter Set To Fly Into Detail Design Phase".
  14. "India's Medium Weight Fighter set to fly into detail design phase". Manoramaonline. 3 February 2020. Retrieved 3 February 2020.
  15. Pandit, Rajat (1 October 2010). "India picks US engines over European for Tejas". The Times of India.
  16. Waldron, Greg (22 January 2013). "India to obtain 99 GE F414 engines for Tejas Mk II". Flightglobal.com. Retrieved 12 September 2019.
  17. "The Tejas Mark 2 fighter has been bulked up into medium fighter category".
  18. "Tejas Mk-II: India may avail consultancy from European manufacturers who bid for MMRCA deal". The Economic Times. Press Trust of India. 11 July 2018.
  19. "LCA Tejas to level up with on-board oxygen system by early 2020, says DRDO". The New Indian Express. Retrieved 21 April 2020.
  20. "DIAT system soon to monitor in-flight health of Tejas Mk-II - Indian Express". archive.indianexpress.com. Retrieved 21 April 2020.
  21. Tauro, Caron Natasha (20 February 2019). "Aero India 2019: ADA unveils Tejas AF Mk 2 Medium Weight Fighter". Jane's Defence Weekly. Bangalore. Archived from the original on 20 February 2019.
  22. "The Tejas Mark 2 fighter has been bulked up into medium fighter category".
  23. Pandit, Rajat (1 October 2010). "India picks US engines over European for Tejas". The Times of India.
  24. Waldron, Greg (22 January 2013). "India to obtain 99 GE F414 engines for Tejas Mk II". Flightglobal.com. Retrieved 12 September 2019.
  25. "MWF Tejas Mk-2 will feature " Semi Stealth " Air frame".
  26. Sharma, Ravi. "Kaveri engine programme delinked from the Tejas." The Hindu, (Chennai, India), 27 September 2008. Retrieved 29 May 2012. Archived 3 November 2012 at the Wayback Machine
  27. Raghuvanshi, Vivek. "Eurojet Bolsters Engine Offer for India's LCA." Archived 5 April 2016 at the Wayback MachineDefense News, 4 January 2010. Retrieved 29 May 2012.
  28. Shukla, Ajai. "American engine to power LCA." Bharat-Rakshak.com, 1 October 2010. Retrieved 30 May 2012. Archived 11 October 2012 at the Wayback Machine
  29. "India picks GE's F414 for Tejas MkII fighter." Flight International, 1 October 2010. Retrieved 30 May 2012. Archived 9 August 2011 at the Wayback Machine
  30. Joshi, Saurabh (1 October 2010). "GE 414 picked for LCA". StratPost. Retrieved 12 September 2019.
  31. "F414 Turbofan Engine" (PDF). GE Aviation. Retrieved 25 June 2020.
  32. "GE AVIATION INDIA FACT SHEET" (PDF). GE Aviation. Retrieved 25 June 2020.
  33. Krishnan M, Anantha (3 February 2020). "India's Medium Weight Fighter set to fly into detail design phase". OnManorama. Retrieved 3 February 2020.
  34. "Tejas Mark II to have ability to conduct Balakot-like operations". Hindustan Times. 19 March 2020. Retrieved 19 March 2020.
  35. "14 India Specific Enhancements Exclusive to India bound Rafale fighter jets".
  36. "MWF-MK2 will feature Next Generation Wide Area Display (WAD)".
  37. "Metal-cutting for single-engine Tejas fighter planes to begin in February". Hindustan Times. 8 December 2019. Retrieved 9 December 2019.
  38. https://defenceforumindia.com/threads/ada-tejas-mark-ii-medium-weight-fighter.45058/post-1631091. Retrieved 8 February 2020. Missing or empty |title= (help)
  39. https://www.globalsecurity.org/military/world/india/lca-mk2.htm
  40. https://defenceupdate.in/mwf-tejas-tejas-mk2-mwf-will-important/
  41. https://www.hindustantimes.com/india-news/tejas-mark-ii-to-have-ability-to-conduct-balakot-like-ops/story-kMUDWj7o7GkrK2WTsAsGEM.html
  42. https://zeenews.india.com/india/brahmos-to-make-a-generational-leap-become-lighter-faster-and-more-lethal-supersonic-cruise-missile-2182681.html
  43. https://www.hindustantimes.com/india-news/tejas-mark-ii-to-have-ability-to-conduct-balakot-like-ops/story-kMUDWj7o7GkrK2WTsAsGEM.html
  44. https://www.hindustantimes.com/india-news/tejas-mark-ii-to-have-ability-to-conduct-balakot-like-ops/story-kMUDWj7o7GkrK2WTsAsGEM.html

Technical:

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.