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Aviation / Aerospace


HAL HPT-32 (HTT-34) Deepak


Twin-Seat, Single-Engine Basic Trainer Aircraft [ 1978 ]



The indigenously designed and developed HAL HPT-32 served both the Indian Air Force and Navy during its time as a basic trainer for the country.



Authored By: Staff Writer | Last Edited: 01/28/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

VIEW SPECIFICATIONS [+]
The HAL (Hindustan Aeronautics Ltd) HPT-32 "Deepak" ("Lamp") was an Indian basic/primary trainer aircraft development of the Cold War period, the design being adopted by both the Indian Air Force (IAF) and Indian Navy (8 examples) services for basic airman training. Development took place in the 1970s and a first-flight was recorded on January 6th, 1977. Two primary operational versions were eventually produced - the "HPT-32" and "HTT-34".

The aircraft was of fundamental design driven by a two-bladed propeller unit at the nose, seating its crew of two (student and instructor) in side-by-side arrangement, and sporting low-mounted, straight mainplane wing members. The tail unit was largely conventional, given a single vertical fin and low-set horizontal planes. The tricycle undercarriage (nose leg with main legs) were fixed in flight non-retractable) while the wide-view canopy provided excellent vision "out-of-the-cockpit".

As built, the HPT-32 had an overall length of 25.3 feet, a wingspan of 31.1 feet, and a height of 9.6 feet. Empty weight reached 2,280lb with a Maximum Take-Off Weight (MTOW) nearing 2,915lb. The aircraft held a maximum speed of 175 miles-per-hour and ranged out to 755 nautical miles on internal fuel. Four external hardpoints were integral, these positions satisfying armed training endeavors. Up to 562lb of ordnance could be carried including machine gun pods, rockets, and conventional drop bombs.

The base operating version was the HPT-32 and this was followed into service by the HTT-34 which upgraded to a turboprop engine installation offering more power and better performance over the original. The powerplant-of-choice for this entry became the American Allison 250-B17D engine of 420 horsepower and a first-flight of this variant was recorded on June 17th, 1984.

Beyond its basic training role, the versatile, lightweight HPT-32 covered liaison/observation and target towing duties.

The line was replaced by the much more modern Swiss-originated Pilatus PC-7 (Mk.II) in same role during 2013.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.

Specifications



Hindustan Aeronautics Limited (HAL) - India
Manufacturer(s)
India
Operators National flag of India
1978
Service Year
India
National Origin
Retired
Project Status
2
Crew
200
Units


TRAINING
Developed ability to be used as a dedicated trainer for student pilots (typically under the supervision of an instructor).


25.3 ft
(7.70 meters)
Length
31.2 ft
(9.50 meters)
Width/Span
9.5 ft
(2.90 meters)
Height
2,282 lb
(1,035 kilograms)
Empty Weight
2,921 lb
(1,325 kilograms)
Maximum Take-Off Weight
+639 lb
(+290 kg)
Weight Difference


1 x Lycoming AEO-540-D4B5 piston engine developing 260 horsepower and driving a two-bladed propeller unit at the nose.
Propulsion
174 mph
(280 kph | 151 knots)
Max Speed
870 miles
(1,400 km | 756 nm)
Range


MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


OPTIONAL:
Four hardpoints for the carrying of conventional drop bombs, rocket pods, and gun pods for training purposes.


4
Hardpoints


X
X
X
X
Hardpoints Key:

Centerline
Wingroot(L)
Wingroot(R)
Wing
Wingtip
Internal
Not Used


HPT-32 - Base Series Designation; basic trainer versions; equipped with Lycoming AEO-540 piston engines.
HTT-34 - Turboprop-powered form fitting Allison 250-B17D series engine; version of 1984.


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