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Hiller OH-23 Raven

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OH-23G Raven 61-3144

An OH-23G Raven.

The Hiller OH-23 Raven was an American light observation helicopter manufactured by the Hiller Aircraft Corporation. 


The OH-23 was based on the Hiller Model 360, which was designed by Stanley Hiller in 1947. The design was selected for use by the US Army after it completed a transcontinental flight of the United States in 1949 and was designated H-23. It saw service during the Korean War in the observation, utility, and medevac roles. It was even used early in the Vietnam War, before being replaced by the OH-6 Cayuse. The Raven also served with a number of other countries, including France, South Korea, and Great Britain. 


  • Powerplant: one Lycoming VO-435-23B[27] 6-cylinder piston engine
  • Maximum speed: 95 mph (153 km/h, 83 knots)
  • Range: 197 mi (317 km, 171 nmi)
  • Service ceiling: 13,200 ft (4,025 m)
  • Crew: 2
  • Empty weight: 1,816 lb (825 kg)
  • Length: 27 ft 9 1⁄2 in (8.47 m)
  • Rotor diameter: 35 ft 5 in[27] (10.80 m)
  • Height: 9 ft 9 1⁄2 in (2.99 m)

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