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.
Hindustan HPT-32 Deepak Article
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.
HPT-32
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.
HTT-34
Engine: Allison 250-B17D
All Aero 