KAI T-50 Golden Eagle

This article is about South Korean trainer and multirole aircraft family. For Sukhoi T-50 prototype fighter, see Sukhoi PAK FA.
T-50 Golden Eagle
Republic of Korea Air Force TA-50 in 2010
Role Advanced trainer, multirole fighter
Manufacturer Korea Aerospace Industries (with technical support from Lockheed Martin)
First flight 20 August 2002[1]
Introduction 22 February 2005[2]
Status In service
Primary users Republic of Korea Air Force
Indonesian Air Force
Philippine Air Force
Iraqi Air Force
Produced 2001–present
Number built 82
Unit cost
T-50: US$21 million (2008)[3]
TA-50: US$25 million (2011)[4]
FA-50: US$30 million (2012)[5]

The KAI T-50 Golden Eagle (골든이글) is a family of South Korean supersonic advanced trainers and multirole light fighters, developed by the consortium established by Korea Aerospace Industries (KAI) with the American aerospace company Lockheed Martin. The T-50 is South Korea's first indigenous supersonic aircraft and one of the world's few supersonic trainers.[6] Development began in the late 1990s, and its maiden flight occurred in 2002. The aircraft entered active service with the Republic of Korea Air Force (ROKAF) in 2005.

The T-50 has been further developed into aerobatic and combat variants, namely T-50B, TA-50, and FA-50. The F-50 is another advanced fighter variant being considered. The T-50B serves with the South Korean air force's aerobatics team. The TA-50 light attack variant has been ordered by Indonesia. The Philippines ordered 12 units of the FA-50 variant. The T-50 is also being marketed as a candidate for the United States Air Force's next-generation T-X trainer programme.[7]

Development

Origins

The T-50 program was originally intended to develop an indigenous trainer aircraft capable of supersonic flight, to train and prepare pilots for the KF-16 and F-15K, replacing trainers such as T-38 and A-37 that were then in service with the ROKAF.[8] Prior South Korean aircraft programs include the propeller-driven KT-1 basic trainer produced by Daewoo Aerospace (now part of KAI), and license-manufactured KF-16.[1] In general, the T-50 series of aircraft closely resembles the KF-16 in configuration.[8]

An ROKAF T-50, 2005

The mother program, code-named KTX-2, began in 1992,[9] but the Ministry of Finance and Economy suspended KTX-2 in 1995 due to financial constraints.[10] The basic design of the aircraft was set by 1999.[1] The development of the aircraft was funded 70% by the South Korean government, 17% by KAI, and 13% by Lockheed Martin.[1]

The aircraft was formally designated as the T-50 Golden Eagle in February 2000.[1] The T-50A designation was reserved by the U.S. military to prevent it from being inadvertently assigned to another aircraft model.[11][12] Final assembly of the first T-50 took place between 15 January and 14 September 2001.[1] The first flight of the T-50 took place in August 2002, and initial operational assessment from 28 July to 14 August 2003.[1]

KAI and Lockheed Martin are currently pursuing a joint marketing program for the T-50 internationally. The ROKAF placed a production contract for 25 T-50s in December 2003, with aircraft scheduled to be delivered between 2005 and 2009.[13] Original T-50 aircraft are equipped with the AN/APG-67(v)4 radar from Lockheed Martin.[14] The T-50 is equipped with a GE F404 engine with Full Authority Digital Engine Control (FADEC) built under license by Samsung Techwin.[15] Under the terms of the T-50/F404-102 co-production agreement, GE provides engine kits directly to Samsung Techwin who produces designated parts as well as performing final engine assembly and testing.[16]

Improved versions

The program has expanded beyond a trainer concept to include the TA-50 light attack aircraft, as well as the FA-50 multirole fighter similar to the multirole KF-16. The TA-50 variant is a more heavily armed version of the T-50 trainer, intended for lead-in fighter training and light attack roles. It is equipped with the Elta EL/M-2032 fire control radar.[17] The TA-50 is designed to operate as a full-fledged combat platform for precision-guided weapons, air-to-air missiles,[18] and air-to-ground missiles.[19] The TA-50 can mount additional utility pods for reconnaissance, targeting assistance, and electronic warfare. Reconnaissance and electronic warfare variants are also being developed, designated as RA-50 and EA-50.[20][21]

The FA-50 is the most advanced version of the T-50. It is equipped with a modified Israeli EL/M-2032 pulse-Doppler radar with further Korean-specific modifications by LIG Nex1,[22] and has more internal fuel capacity, enhanced avionics, a longer radome and a tactical datalink.[23][24] The engine could be either Eurojet EJ200 or General Electric F414, upgraded to 20,000 lb or 22,000 lb thrust, which is about 12-25% higher than the F404's thrust.[7][25] The engines are already being offered for the baseline T-50 for future customers. The radar selected for the FA-50 has a range two-thirds greater than the TA-50's radar.[26] The EL/M-2032 was initially chosen over Lockheed Martin's preferred AN/APG-67(V)4 and SELEX Vixen 500E active electronically scanned array (AESA) radars. Other AESA radars such as Raytheon Advanced Combat Radar and Northrop Grumman's Scalable Agile Beam Radar are options for future production,[27][28] and will likely be shared with the same AESA radar chosen for the USAF and ROKAF F-16 fighters.[5] Samsung Thales is also independently developing a domestic multi-mode AESA radar for the FA-50.[29] In December 2008, South Korea awarded a contract to KAI to convert four T-50s to FA-50 standard by 2012. In 2012, the ROKAF ordered 20 FA-50 fighters to be delivered by the end of 2014.[5] The maiden flight of the FA-50 took place in 2011.[30] 60 FA-50 aircraft are to be produced for the ROKAF from 2013 to 2016.[31] KAI received a 1.1 trillion won ($1 billion) order for FA-50 fighter aircraft in May 2013.[32]

Design

Overview

The T-50 Golden Eagle design is largely derived from the F-16 Fighting Falcon, and they have many similarities: use of a single engine, speed, size, cost, and the range of weapons.[9] KAI's previous engineering experience in license-producing the KF-16 was a starting point for the development of the T-50.[33]

The trainer has seating for two pilots in a tandem arrangement. The high-mounted canopy developed by Hankuk Fiber is applied with stretched acrylic, providing the pilots with good visibility, and has been tested to offer the canopy with ballistic protection against 4-lb objects impacting at 400 knots.[34] The altitude limit is 14,600 metres (48,000 ft), and airframe is designed to last 8,000 hours of service.[35] There are seven internal fuel tanks with capacity of 2,655 litres (701 US gal), five in the fuselage and two in the wings. An additional 1,710 litres (452 US gal) of fuel can be carried in the three external fuel tanks.[13] T-50 trainer variants have a paint scheme of white and red, and aerobatic variants white, black, and yellow.[36]

The T-50 uses a single General Electric F404-102 turbofan engine license-produced by Samsung Techwin,[37] upgraded with a FADEC system jointly developed by General Electric and KAI.[38] The engine consists of three-staged fans, seven axial stage arrangement, and an afterburner.[13] The aircraft has a maximum speed of Mach 1.5.[39] Its engine produces a maximum of 78.7 kN (17,700 lbf) of thrust with afterburner.[13] The more powerful F414 and EJ200 engines have been suggested as the new engine for the T-50 family.[7]

Avionics

The T-50's central processing unit and its operating system are developed by MDS Technology.[40] The T-50's NEOS avionics operating system is the first and only real-time operating system to be developed by an Asian company, and holds both DO-178B and IEEE POSIX certification.[40][41][42][43] Samsung Thales and LIG Nex1 are the main avionics and electronic warfare equipment developers for T-50 and its variants.[44][45] Other South Korean companies and defense institutes such as DoDAAM Systems, Aeromaster, Intellics, and Korea Institute of Defense Analysis are responsible for the aircraft's secondary avionics and embedded systems, including store management computers,[46] avionics testing equipment,[47] flight data recorders,[48] portable maintenance aids,[49] data analysis software,[50] post-flight data processing system,[51] aircraft structure and engine management software,[52][53] and mission planning and support systems.[54] The TA-50 version is equipped with an ELTA EL/M-2032 fire control radar.[55]

The T-50 is equipped with a Honeywell H-764G embedded global positioning/inertial navigation system and HG9550 radar altimeter.[13] The aircraft is the first trainer to feature triple-redundant digital fly-by-wire controls.[35] The cockpit panels, switches, and joysticks are produced by South Korea's FirsTec and Sungjin Techwin, head-up display by DoDaaM Systems, and multi-function display by Samsung Thales.[54][56][57][58] Other South Korean subcontractors such as Elemech, Dawin Friction, and Withus cooperate in T-50 components production.[59] Hanwha supplies the mechanical parts for the flight control system,[60] and WIA supplies the undercarriage.[61]

Armament and equipment

The TA-50 version mounts a three-barrel cannon version of the M61 Vulcan internally behind the cockpit, which fires linkless 20 mm ammunition.[13] Wingtip rails can accommodate the AIM-9 Sidewinder missile, a variety of additional weapons can be mounted to underwing hardpoints.[13] Compatible air-to-surface weapons include the AGM-65 Maverick missile, Hydra 70 and LOGIR rocket launchers, CBU-58 and Mk-20 cluster bombs, and Mk-82, −83, and −84 general purpose bombs.[1]

FA-50 can be externally fitted with Rafael's Sky Shield or LIG Nex1's ALQ-200K ECM pods, Sniper or LITENING targeting pods, and Condor 2 reconnaissance pods to further improve the fighter's electronic warfare, reconnaissance, and targeting capabilities.[62][63] Other improved weapon systems include SPICE multifunctional guidance kits,[64] Textron CBU-97/105 Sensor Fuzed Weapon with WCMD tail kits, JDAM, JDAM-ER for more comprehensive air-to-ground operations, and AIM-120 missiles for BVR air-to-air operations.[65] FA-50 has provisions for, but does not yet integrate, Python and Derby missiles, also produced by Rafael, and other anti-ship missiles, stand-off weapons, and sensors to be domestically developed by Korea.[66][67][68]

Operational history

A T-50B of the Black Eagles aerobatic team in 2012
FA-50 Fighting Eagle

Republic of Korea

In 2011, the first squadron with the TA-50, the T-50's light attack variant, become operational with the ROKAF.[69] The ROKAF's Black Eagles aerobatic team operates the T-50B version. In 2014, the FA-50 was officially deployed to the ROKAF with President Park Geun-hye officially leading the ceremony of which a flight demonstration was held showing its capabilities. 20 FA-50's was assigned its own Air Force wing. 60 FA-50's were ordered by ROKAF.[70] On 9 October 2014, an FA-50 successfully test fires an AGM-65 Maverick on a stationary target, a retired ship.[71]

Indonesia

Indonesia had been considering the T-50, along with four other aircraft to replace its BAE Hawk Mk 53 trainer and OV-10 Bronco attack aircraft.[72] In August 2010, Indonesia announced that T-50, Yak-130 and L-159 were the remaining candidates for its requirement for 16 advanced jet trainers.[73] In May 2011, Indonesia signed a contract to order 16 T-50 aircraft for US$400 million.[74] The aircraft is to feature weapons pylons and gun modules, enabling light attack capabilities.[4][75] The Golden Eagles are to replace the Hawk Mk 53 in Indonesian Air Force service.[76] Indonesia's version has been designated T-50i. Deliveries began in September 2013.[77] The last pair of T-50i aircraft were delivered in January 2014.[78]

Iraq

Iraq was negotiating the acquisition of T-50 trainer jets, having first publicly expressed official interest during the Korea-Iraq summit in Seoul on 24 February 2009.[79] In April 2010, Iraq reopened the jet lead-in fighter-trainer competition for 24 aircraft, in which TA-50 competed.[80] In December 2013, it was announced that Iraq signed a contract on the acquisition of 24 aircraft of the T-50IQ variant plus additional equipment and pilot training over the next 20 years.[81][82] The first delivery will occur in April 2016, with all aircraft to be delivered over the next 12 months.[83]

Philippines

The Philippine Air Force chose 12 KAI TA-50 aircraft to fulfill its requirement for a light attack and lead-in fighter trainer aircraft. The Department of National Defense (DND) announced the selection of the type in August 2012.[55] Funding for 12 aircraft was approved by Congress on September 2012,[84] but by late January 2013, state media reported that the FA-50, not the TA-50 as previously reported, was selected for the 12-aircraft procurement.[85]

In October 2013, the President Aquino said the DND was close to finalizing the FA-50 deal,[86] and on 19 October 2013, President Aquino and President Park Geun-hye of South Korea signed a memorandum of understanding (MoU) with provisions for acquisitions.[87] On 13 February 2014, President Aquino approved the payment scheme for purchasing 12 lead-in fighter trainers with P18.9 billion ($415.7 million) budgeted.[88] On 28 March 2014, the Philippines' Department of National Defense signed a contract for 12 FA-50 light attack aircraft worth P18.9 billion (US$421.12 million).[89][90][91] The first two FA-50s are planned to be delivered 18 months after contract signing. Deliveries are to finish in 2017.[92] Plans for 3 to 4 out of 12 units are to be fitted with BVR of unknown type.[93] In March 2015, Stockholm International Peace Research Institute (SIPRI) reported that the Philippines plans to order additional FA-50s.[94][95]

Possible sales

The Spanish Air Force is interested in a cooperation agreement with South Korea for use of training aircraft, including the T-50.[96]

The United Arab Emirates (UAE) is seeking 35–40 fighter-trainers. In February 2009, UAE selected the M-346 over the T-50.[97] But in January 2010, the UAE reopened the trainer contest.[98] In 2011, it was confirmed that T-50 was still competing for the UAE purchase.[99]

In the U.S., South Korea will attempt to sell T-50s and buy F-35s.[100] The T-50 is one of the contenders for the U.S. Air Force's T-X program, with an opportunity to export 300 to 1,000 aircraft.[7]

Thailand has requested information from KAI regarding its TA-50 and FA-50 variants.[101] The Chilean Air Force might have a sale with KAI about the aircraft. Also, Botswana sees as a possible costumer.[102] Azerbaijan has expressed interest in purchasing T-50 trainers.[103] Brunei has expressed interest in the FA-50.[104]

South Korea also plans to offer the FA-50 to Colombia and Peru.[105][106]

Pakistan Air Force is considering purchase of the South Korean KAI T-50 Lead In Fighter Trainer (LIFT) to revamp its Air Force training program.[107]

Failed bids

Singapore evaluated the T-50 against the Italian Alenia Aermacchi M-346 and the BAE Systems Hawk for a $500 million trainer acquisition program contract for 12–16 aircraft.[108] The Singapore Ministry of Defense eventually selected the M-346 aircraft ahead of T-50 and BAE Hawk in July 2010.[109]

Israel had been evaluating the T-50 as a possible replacement for its Douglas TA-4H Skyhawk trainers since 2003.[110] On 16 February 2012, Israel announced its decision to procure thirty M-346 instead.[111][112]

Variants

TA-50 group display at ROKAF air base

Operators

T-50I Indonesian Air force version
 Indonesia
 Iraq
 Republic of Korea
 Philippines

Specifications

FA-50 test flight
FA-50 landing for ROKAF's first delivery
TA-50 Lead In Fighter Trainer at KAI
T-50 Golden Eagles lining up

Data from Korea Aerospace,[39] Lockheed Martin[119]

General characteristics

Performance

Armament

Avionics

Note: armament for TA-50 and FA-50 only.

See also

Related development
Aircraft of comparable role, configuration and era

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "Korean Aerospace T-50 Golden Eagle". Flug Revue, 8 July 2004. copy archived 11 June 2008.
  2. ↑ First T-50 Golden Eagles Delivered to Korean Air Force; Only Supersonic Trainer in Production Today. Lockheed Martin, 22 February 2006.
  3. ↑ "S. Korea To Tout T-50 Trainer to Singapore". Defense News, 26 August 2008.
  4. ↑ 4.0 4.1 "Indonesia Orders 16 T-50s From Korea". Aviation Week
  5. ↑ 5.0 5.1 5.2 Seoul places $600m order for 20 FA-50s
  6. ↑ "Domestic Light Attack Jets Due in 2013". The Korea Times, 30 December 2008.
  7. ↑ 7.0 7.1 7.2 7.3 Lockheed ponders T-50 re-engining for T-X programme
  8. ↑ 8.0 8.1 "Korea's T-50 Family Spreads Its Wings". Defenseindustrydaily.com, 21 August 2013. Retrieved 8 September 2013.
  9. ↑ 9.0 9.1 Korean Aerospace Industries T-50 Golden Eagle. Aeroflight
  10. ↑ "KTX-2 Indigenous Trainer". GlobalSecurity.org
  11. ↑ DOD 4120.15-L – Addendum, MDS Designators, Designation-Systems.net.
  12. ↑ Parsch, Andreas. ""Missing" USAF/DOD Aircraft Designations". Retrieved 2009-02-16.
  13. ↑ 13.0 13.1 13.2 13.3 13.4 13.5 13.6 T-50 Golden Eagle Jet Trainer and Light Attack Aircraft, South Korea. Air Force Technology.
  14. ↑ "Korean T-50 displays fast-jet credentials". AIN Online, 11 December 2006.
  15. ↑ "Black Eagles aerobatic display team". bainesplanes.co.uk. Retrieved 2013-06-16.
  16. ↑ 16.0 16.1 "Republic of Korea orders 57 F404 Engine Kits for T-50 Trainers". GE Aviation. Retrieved 2013-06-16.
  17. ↑ PICTURES: KAI rolls out first production T/A-50
  18. ↑ A-50 Successful AIM-9 Launch
  19. ↑ A-50 Successful AGM-65 Launch
  20. ↑ A-50 Growth Capability
  21. ↑ South Korea to develop EA aircraft
  22. ↑ International, Forecast. (2009-07-28) South Korea and Israel to Jointly Develop Radar. Defencetalk.com. Retrieved on 2011-06-05.
  23. ↑ T/A-50 makers plan Israeli pitch. Flightglobal.com. Retrieved: 2011-06-05.
  24. ↑ KAI / Lockheed Martin T-50 / TA-50 / FA-50 Golden Eagle. Militaryfactory.com
  25. ↑ Eurojet offers Korea chance to join consortium
  26. ↑ ‘국산 공격기' FA-50 시범 비행 최초 공개
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  29. ↑ http://www.samsungthales.com/eng/main.asp Samsung Thales: Multi-Mode Active Phase Array Radar (FA50)
  30. ↑ FA-50 prototype
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  34. ↑ "Hankuk Fiber T-50 Canopy".
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  36. ↑ 공군 '블랙이글스' T-50 교체 후 원대복귀
  37. ↑ Repair & overhaul services for USFK helicopter engines, 2009
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  40. ↑ 40.0 40.1 "MDS Technology NEOS RTOS". MDS Technology.
  41. ↑ "MDS Technology relies on VectorCAST for DO-178B Level A certification testing" (PDF). vectorcast.com. Retrieved on 2011-06-05.
  42. ↑ MDS Technology NEOS Version 3.0 RTOS IEEE POSIX certification
  43. ↑ Software Accomplishments Summary for the NEOS-178S Operating System
  44. ↑ "Samsung Thales Avionics/Electronic Warfare Systems". ?.
  45. ↑ "LIG Nex1 Avionics". ?.
  46. ↑ "DoDAAM Systems SMC".
  47. ↑ "DoDAAM Systems ATE". ?.
  48. ↑ "DoDAAM Systems DPS". ?.
  49. ↑ "DoDAAM Systems PMA".
  50. ↑ "DoDAAM Systems MDAS". ?.
  51. ↑ DoDAAM Systems R&D History
  52. ↑ "DoDAAM Systems IEMMS". ?.
  53. ↑ "Aeromaster ASIP/ENSIP". ?.
  54. ↑ 54.0 54.1 T-50 Avionics Embedded Software Development Using Java
  55. ↑ 55.0 55.1 Cohen, Michael. "Philippines confirms T/A-50 purchase"(subscription required). Janes Defence Weekly, Vol 49, Issue 32, 8 August 2012.
  56. ↑ "FirsTec T-50 Cockpit Panel". ?.
  57. ↑ F-35 전투기 조종간 만드는 한국 벤처
  58. ↑ T-50 Components Exhibition
  59. ↑ T-50 Industrial Participants
  60. ↑ "Hanwha T-50 flight control system". ?.
  61. ↑ "WIA T-50 undercarriage". ?.
  62. ↑ Sniper Targeting Pod for FA-50
  63. ↑ Condor 2 Reconnaissance Pod for FA-50
  64. ↑ Rafael SPICE 1000 Guided Bomb
  65. ↑ 65.0 65.1 FA-50 Expanded Weapons and Avionics. bemil.chosun.com. Retrieved on 2011-06-05.
  66. ↑ AMRAAM and Derby for FA-50
  67. ↑ Python 5 and New Weapons Developed by Korea for FA-50
  68. ↑ IN FOCUS: South Korea outlines strategy for indigenous fighter
  69. ↑ Air Force to deploy 20 TA-50 light fighter attack aircraft by next year
  70. ↑ http://english.chosun.com/site/data/html_dir/2014/10/31/2014103101236.html
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  76. ↑ T-50 "Perkuat TNI AU". AntaraNews.com, 9 April 2011. Retrieved on 5 June 2011.
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  78. ↑
  79. ↑ "Iraq Asks for Korea's T-50 Trainer Jets". Korea Times, 15 March 2009. Retrieved 30 March 2009.
  80. ↑ "Iraq's New Trainer-Fighters: FA-50 Bounces the Czech". Defense Industry Daily, 12 December 2013.
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  87. ↑ http://www.tribune.net.ph/nation/noy-park-ink-pact-for-p19-b-fighter-jet-acqisition-contract
  88. ↑ http://www.philstar.com/headlines/2014/02/21/1292810/palace-oks-payment-scheme-s.-korean-fighter-jets
  89. ↑ 89.0 89.1 "KAI won a contract to export 12 FA-50s to the Phil" (Press release). Korea Aerospace Industries, LTD. (KAI). 2014-03-28. Retrieved 2014-06-20.
  90. ↑ 90.0 90.1 http://www.arirang.co.kr/News/News_View.asp?nseq=159955
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  92. ↑ http://globalnation.inquirer.net/99293/ph-to-buy-12-fighters-jets-from-south-korea
  93. ↑ http://rentaka.weebly.com/blog/philippines-eyes-bvr-upgrades-for-fa-50
  94. ↑ http://books.sipri.org/files/FS/SIPRIFS1503.pdf
  95. ↑ http://www.philstar.com/headlines/2015/03/20/1435559/phl-buy-24-more-combat-aircraft-south-korea
  96. ↑ "Spain is interested in KAI T-50"
  97. ↑ UAE chooses M-346 as advanced lead-in fighter trainer. Flightglobal.com. Retrieved on 2011-06-05.
  98. ↑ "UAE Reopens Talks To Buy T-50 Trainer". Defense News,
  99. ↑ Lee's UAE trip raises hopes for first sale of T-50s
  100. ↑ Jeong Yong-soo, Nam Koong-wook. "Contractor is nabbed for ripping off the military." Korea JoongAng Daily, 16 April 2011.
  101. ↑ http://www.defensenews.com/article/20131109/DEFREG/311090020/Seoul-Sees-More-Weapons-Sales-Thailand
  102. ↑ http://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=513
  103. ↑ "Azerbaijan intends to purchase weapons and military equipment from South Korea". Armyrecognition.com, 29 August 2013
  104. ↑ http://m.korea.net/english/NewsFocus/Policies/view?articleId=123827
  105. ↑ http://english.yonhapnews.co.kr/national/2015/01/29/85/0301000000AEN20150129004500315F.html
  106. ↑ http://english.chosun.com/site/data/html_dir/2015/02/04/2015020401153.html
  107. ↑ Pakistan Eyes T-50 as Trainer Option
  108. ↑ "South Korea's Black Eagles to fly KAI T-50". Flightglobal.com, 19 March 2008.
  109. ↑ Alenia Aermacchi's M-346 wins Singapore jet trainer race. Janes.com (2010-12-07). Retrieved on 2011-06-05.
  110. ↑ KAI steps up T-50 pitch to Israel
  111. ↑ Arie Egozi. "Israel selects Alenia Aermacchi M-346 for trainer deal". Flightglobal.com. Retrieved 17 February 2012.
  112. ↑ Katz, Yaakov (16 February 2012). "Italy wins IAF with combat trainer jet bid". JPost.
  113. ↑ 113.0 113.1 113.2 113.3 "T-50 Family". KAI. Retrieved 11 July 2012.
  114. ↑ 114.0 114.1 "Korea Pushing Helos, Mini-F-16, and Devil Killer at Singapore Airshow"
  115. ↑ http://www.tni.mil.id/view-58177-t-50i-golden-eagle-siap-kawal-nkri.html
  116. ↑ Iraqi air force orders 24 KAI T-50s
  117. ↑ http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=100&oid=001&aid=0007218784
  118. ↑ . KBS News, 19 August 2013.
  119. ↑ 119.0 119.1 T-50 Golden Eagle Product Specification. Lockheed Martin.

External links

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