Military Wiki
Company concept of the HAL HTT-40
Role Basic training aircraft
National origin India
Manufacturer Hindustan Aeronautics Ltd
Status Under development
Unit cost
Rs 34.5 crore (345,000,000 Indian rupees, about US$6.5M in 2013)[1]

The Hindustan Turbo Trainer-40 aircraft project is a Hindustan Aeronautics Ltd (HAL) proposal for an indigenous replacement for 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 950 hp (708 kW) turbo-prop 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]

Specifications (HTT-40)

Data from HAL[3]

General characteristics

  • Crew: 2
  • Gross weight: 2,800 kg (6,173 lb)
  • Powerplant: 1 × to be determined turboprop, 710 kW (950 hp)


  • Maximum speed: 600 km/h (373 mph; 324 kn) [7]
  • Range: 1,000 km (621 mi; 540 nmi)
  • Service ceiling: 6,000 m (19,685 ft)


  • Can be armed with a gun, rockets and bombs[1][7]
  • References

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