HAL HPT-32 Deepak
| Industry | Aerospace and defense |
|---|---|
| Founded | December 23, 1940 in Bangalore, India |
| Headquarters | Bangalore , India |
| Products | Aircraft, helicopters, aerospace components |
| Owner | Government of India |
| Website | hal-india |
The HAL HPT-32 Deepak () is a propeller-powered primary trainer aircraft developed in India by Hindustan Aeronautics Limited (HAL). It has been employed by both the Indian Air Force and Indian Navy to conduct initial pilot instruction. This low-wing monoplane features a single engine and accommodates two crew members seated side-by-side. It is designed to support aerobatic maneuvers, navigation training, and basic flight proficiency. Equipped with a turboprop powerplant, the aircraft delivers efficient fuel consumption and user-friendly handling characteristics suitable for trainee pilots.
Although it fulfilled its training role effectively, the HPT-32 experienced engine reliability problems that contributed to several accidents, leading to a reduced operational lifespan. As a result, it was eventually withdrawn from service and succeeded by more advanced trainers such as the HAL HTT-40.
Operational history
The Deepak was utilized primarily for elementary pilot training but also performed observation, liaison, and target towing missions. It permits limited inverted flight—up to one minute—through a fuselage-mounted collector tank and possesses an estimated glide ratio of 8.5:1. To improve safety in the event of engine failure, HAL and the Indian Air Force investigated the integration of Ballistic Recovery Systems; approval for installing parachute recovery systems was granted by the IAF on 16 May 2010. The HPT-32 was superseded in 2013 by the Pilatus PC-7 Mk II, which became the IAF’s new Basic Trainer Aircraft.
Accidents
Seventeen incidents involving the Deepak have been recorded, resulting in nineteen fatalities among pilots. In 2009, when the fleet was grounded, the Comptroller and Auditor General of India characterized the aircraft as "technologically obsolete and fraught with flight safety risks." The HAL HTT-40 has been designated as the replacement for the HPT-32 in India’s primary training role.
Variants
- HPT-32
- This is the original model powered by a Textron Lycoming EIO-540-D4B5 flat-six piston engine.
- HTT-34
- A turboprop variant equipped with an Allison 250-B17D engine, which had its maiden flight on 17 June 1984.
Former Operators
- Indian Air Force – 144 units
- Indian Navy – 8 units
See also
Related developments from HAL:
Comparable primary trainers:
Bibliography
- Taylor, M.J.H. (ed.). Brassey's World Aircraft Systems Directory 1999/2000 Edition. London: Brassey's, 1999. .