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HAL HTT-40

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HTT-40
Role Basic training aircraft
National origin India
Manufacturer Hindustan Aeronautics Limited
First flight 31 May 2016[1]
Status Under development
Primary user Indian Air Force
Number built 2 prototypes

The HAL HTT-40 is an Indian training aircraft, designed and built by Hindustan Aeronautics Limited (HAL). It will replace the Indian Air Force's retired HPT-32 Deepak as a basic trainer.[2][3]

Design and development

The HTT-40 will be an all-metal tandem seat aircraft powered by a 1,100 hp (820 kW) turboprop engine. In early 2012 the company forecast building 106 examples.[3]

By the middle of 2012 the aircraft's future was in doubt as the Indian Air Force ordered 75 Pilatus PC-7 Mk IIs to fill the role envisioned for the HTT-40. In September 2012 the Air Force indicated that it had formally rejected the HTT-40 for service based on its cost per aircraft being double that of the PC-7 Mk II, a proven aircraft already in service worldwide. An MoD official noted, "We would be willing to pay higher rates to build indigenous capability in strategic defence equipment. But can HAL argue that the capability to build basic trainers is strategically vital[?]"[4][5][6]

HAL did not confirm the IAF announcement that it will not buy the HTT-40, nor would the company indicate whether the aircraft's development will be continued. A company spokesman said, "We treat all MOD issues/proposals as confidential...All our projects are conceived with national interest in mind though, at times, some of those take time to fructify".[4]

Once the HTT-40 started flying, the Indian Air Force commander publicly stated that IAF will buy HTT-40 in large numbers.[7]

A HAL HTT-40 in November 2019.

On 28 February 2015, it was reported that Indian defense ministry has selected 68 HAL HTT-40 trainers and 38 Pilatus trainers to replace its current trainer aircraft fleet stating that this move was "commercially viable".[8]

On 21 June 2015, HAL chose the Honeywell Garrett TPE331-12B turboprop to power the trainer.[9]

HAL rolled out the first prototype on 2 February 2016.[10] The HTT-40 had its first flight on 31 May 2016. The flight lasted for about 30 minutes. The pilot carried out circuits and the aircraft performance was satisfactory.[1]

The HTT-40 made its first public introduction flight on 17 June 2016, with Defence Minister Manohar Parrikar in attendance at the HAL airport in Bangalore.[11] On 19 May 2017, the second prototype completed its maiden flight.[12]

On 10 November 2018, HTT-40 started its spin test by successfully entering into two-turn spin and subsequently recovering with the appropriate controls. According to HAL, the spin testing is the most crucial and challenging aspect of flight testing of any aircraft development programme. Arup Chatterjee, Director (Engineering and R&D) said the spin completion was the last metric which needed to be accomplished before the aircraft entered service.[13]

On 6 September 2019 HTT-40 completed a five spin trial successfully and on 7 September 2019 it successfully completed a six spin trial.[14] A HAL official said if all goes right than it will get IOC (Initial operational clearance) by end of 2019 and after placement of order 1st aircraft will be handed over to IAF within 1 year.[15]

HAL is looking for LSP (limited series production) by 2020.[16]

Orders

 India

Specifications (HTT-40)

Data from Jane's All the World's Aircraft[19]

General characteristics

  • Crew: 2
  • Length: 10.5 m (34 ft 5.5 in)
  • Wingspan: 11 m (36 ft 1 in)
  • Height: 3.4 m (11 ft 1.75 in)
  • Gross weight: 2,800 kg (6,173 lb)
  • Fuel capacity: 450 kg
  • Powerplant: 1 × Honeywell Garrett TPE331-12B turboprop, 834 kW (1,100 shp) derated to 708 kW (950 shp)
  • Propellers: 4-bladed

Performance

  • Maximum speed: 400 km/h (249 mph, 216 kn)
  • Never exceed speed: 450 km/h (279 mph, 243 kn)
  • Range: 1,000 km (621 mi, 540 nmi)
  • Service ceiling: 6,000 m (19,680 ft)
  • g limits: +6/-3

Armament

  • Can be armed with a gun, rockets and bombs[20][21]

See also

Aircraft of comparable role, configuration, and era

Related lists

References

  1. ^ a b "HAL-built HTT-40's first flight successful". One India. 31 May 2016. Retrieved 31 May 2016.
  2. ^ HAL Offers New Basic Trainer to Air Force Archived December 17, 2010, at the Wayback Machine
  3. ^ a b Hindustan Aeronautics Ltd (n.d.). "Hal htt-40". Archived from the original on 22 December 2016. Retrieved 8 May 2012.
  4. ^ a b Shukla, Ajai (19 December 2012). "MoD rejects HAL's proposal to build basic trainer". Business Standard. Retrieved 19 December 2012.
  5. ^ "Basic trainer for IAF | Millennium Post". Millenniumpost.in. 2012-06-22. Archived from the original on 2012-11-04. Retrieved 2012-11-28.
  6. ^ SP's Special Correspondent (2012-06-18). "HAL scouts engine for HTT 40 basic trainer - SP's Aviation". Spsaviation.net. Archived from the original on 2012-06-26. Retrieved 2012-11-28. {{cite web}}: |author= has generic name (help)
  7. ^ "Will induct indigenous HTT 40 planes in large numbers: IAF chief". The Indian Express. 2016-09-01. Retrieved 2018-01-09.
  8. ^ "Parrikar: 68 basic trainer aircraft to come from HAL, 38 from Pilatus". The Indian Express. 1 March 2015. Retrieved 1 March 2015.
  9. ^ "HAL Chooses TPE331 for New Indian Basic Trainer".[permanent dead link]
  10. ^ "Boost to Make in India: HAL Rolls-out HTT-40 Prototype". The New Indian Express. Retrieved 2 February 2016.
  11. ^ "Indigenous HTT-40 trainer aircraft makes inaugural flight - Times of India". indiatimes.com. Retrieved 17 June 2016.
  12. ^ "HTT-40 2nd prototype completes maiden flight | Bengaluru News - Times of India". The Times of India.
  13. ^ "HAL successfully begins spin test for trainer aircraft HTT 40". Hindustan Times. November 9, 2018.
  14. ^ SHANKAR, RAVI (2019-09-07). "HAL-built trainer aircraft HTT-40 clears crucial flight test successfully". Business Standard India. Retrieved 2019-09-08.
  15. ^ Pubby, Manu (July 29, 2019). "No need to import trainer aircraft, HTT 40 to be ready by December: HAL" – via The Economic Times.
  16. ^ "HAL needs new orders to prevent complete halt of production after 2021-22". January 11, 2020.
  17. ^ "HAL to sign orders for 73 Advanced Light Helicopters, 106 HTT-40 trainers". India Economic Times. Bengaluru. 15 February 2017. Retrieved 15 February 2017.
  18. ^ "Army, IAF to soon get 73 choppers, 106 HTT-40 trainers from HAL: CMD". India Financial Express. Bengaluru. 15 February 2017. Retrieved 6 August 2018.
  19. ^ Jackson, Paul; Peacock, Lindsay; Bushell, Susan; Willis, David; Winchester, Jim, eds. (2016–2017). "India". IHS Jane's All the World's Aircraft: Development & Production. Couldson. p. 306. ISBN 978-0710631770.{{cite book}}: CS1 maint: location missing publisher (link)
  20. ^ Cite error: The named reference BS15Apr13 was invoked but never defined (see the help page).
  21. ^ "Our trainer aircraft 40 times better than F-16s". Bangalore Mirror. 6 February 2013. Retrieved 9 February 2013.

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