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Hindustan HPT-32 Deepak / HTT-34



In India, on 6 January 1977, Hindustan Aeronautics flew the first of two prototype HPT-32 basic trainer (X2157). Of all-metal construction , the two/three-seat basic trainer was suitable for a range of ab initio training and was developed to meet an Indian air force requirement. The Indian Air Force had ordered 40, which were scheduled for delivery in 1985-6.

Known as the Deepak in Indian Air Force service, 134 were built for Indian Air Force and eight for Navy to replace HT-2s.

A private-venture development of the HPT-32, the turboprop HTT-34 side-by-side trainer first flew on June 17, 1984. The HTT-34 has an Allison 250-B17D engine in place of the original Lycoming AEIO-540 piston unit, but is virtually unchanged aft of the firewall.

Engine: 1 x Lycoming AEIO-540, 195 kW.
Span: 9.5 m.
Length: 7.7 m.
Wing area: 15 sq.m.
Empty wt: 890 kg.
MTOW: 1250 kg.
Warload: 255 kg.
Max speed: 265 kph.
Initial ROC: 335 m / min.
Ceiling: 5500 m.
T/O run (to 15m): 545 m.
Ldg run (from 15m): 487 m.
Fuel internal: 220 lt.
Range/Endurance: 740 km / 4 hr.

Engine: Allison 250-B17D


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