Hiller UH12
- CountryUnited States of America
- TypeLight utility helicopter
- PowerplantsUH12E4T - One 315kW (420shp) Allison 250C20B turboshaft driving a two blade main rotor and two blade tail rotor. UH12E3 - One 255kW (340hp) Textron Lycoming VO540C2A flat six piston engine.
- PerformanceUH12E4T - Max speed 154km/h (83kt). Range with auxiliary tanks 565km (305nm). UH12E3 - Max speed 154km/h (83kt), cruising speed 145km/h (78kt). Initial rate of climb 1290ft/min. Service ceiling 15,000ft. Hovering ceiling out of ground effect 6800ft. Range with reserves 278km (150nm), or 585km (316nm) with optional fuel.
- WeightsUH12E4T - Empty 750kg (1650lb), max takeoff 1406kg (3100lb). UH12E3 - Empty 798kg (1759lb), MTOW 1406kg (3100lb).
- DimentionsUH12E4T - Main rotor diameter 10.80m (35ft 5in), length overall 12.41m (40ft 9in), fuselage length 9.08m (29ft 10in), height 3.08m (10ft 2in). Main rotor disc area 92.0m2 (990.0sq ft). UH12E3 - Same except fuselage length 8.69m (28ft 6in).
- CapacitySeating for three on a bench seat, or for four (two forward and two behind) in UH12E4 and 12E4T.
- ProductionOver 2300 of all versions built, including military H23s.
The Uh12 arrangement of light helicopters has one of the longest and most sporadic creation runs ever.
The Uh12 first flew in 1948. The beginning variation was the Model 12 which was controlled by a 133kw (178hp) Franklin 6v4178b33 motor. The Model 12a emulated from 1952, it presented a semi encased cockpit, while the unique goldfish vessel cockpit initially showed up on the 12c, which likewise presented all metal rotor razor sharp edges (the 12c, or more the 12a and 12b were controlled by a 150kw/200hp or 155kw/210hp motors). The conclusive Uh12e was initially conveyed from May 1959 and contrasts little from the Uh12e3 right now in creation.
Improvements on the Uh12e topic however incorporate the four seat Uh12e4 with an extended fuselage and the Allison 250 turboshaft controlled Uh12et and Uh12e4t. Units were offered permitting the transformation of 12es into 12e4s, while cylinder controlled air ship could be retrofitted with the Allison turboshaft. Substantial quantities of military Hillers were additionally fabricated for the US military as H23 Ravens.
The creation history of the Uh12 is checkered, with outline and introductory generation embraced by the first Hiller organization. Hiller, and after that Fairchild Hiller, developed in excess of 2000 until the late 1960s. The recently framed Hiller Aviation procured configuration and creation rights in 1973 and restarted Uh12e generation. Hiller Aviation was then gained by Rogerson Aircraft in 1984, the first Uh12es made under the new organization flag falling off the line in mid 1984. Rogerson along these lines transformed its name to Rogerson Hiller, and relaunched Uh12e creation in 1991.
The last part of the Uh12 story so far opened in mid 1994 when the first architect and manager Stanley Hiller, in conjunction with Thai financial specialists, obtained the project from Rogerson. The new Hiller Aircraft Corporation is building little quantities of Uh12e3s (the first flew on June 2 1995) for its Thai accomplices, and has additionally flown the Allison 250 turboprop fueled UH-12e3t.
Pictures of Hiller UH12
