Hiller UH-12 / H-23/OH-23 Raven

Light Observation Helicopter

Photo ©: Karsten Palt

The Hiller UH-12 is a single-engine three-seat light utility helicopter produced by the US-American manufacturer Hiller Helicopters Inc. initially designated Hiller 360. The UH-12 in service with the US-Army was designated H-23 Raven, redesignated OH-23 Raven (Observation Helicopter) in 1962. Later civil variants were named the Hiller 12.

The UH-12 was produced in several different variant with two, three or four seats.

Crew	1-2
Passengers	1-3

Propulsion	1 Piston Engine
Engine Model	Lycoming VO-540-1B
Engine Power	235 kW	315 hp

Speed	154 km/h	83 kts 96 mph
Service Ceiling	4.023 m	13.200 ft
Range	330 km	178 NM 205 mi.

Empty Weight	807 kg	1.779 lbs
max. Takeoff Weight	1.270 kg	2.800 lbs

Rotor Blades (main/tail)	2/2
Main Rotor Diameter	10,80 m	35 ft 5 in
Tail Rotor Diameter	1,68 m	5 ft 6 in
Wing Area	91,6 m²	986 ft²
Length	8,53 m	27 ft 12 in
Height	2,98 m	9 ft 9 in

First Flight	1948
Production Status	out of production
Production Range	1949-1965
Total Production	ca. 2000

ICAO Code	H12T UH12
Data for (Version)	Hiller H-23D Raven
Variants	H-23A (UH-12A), H-23B / OH-23B, H-23C / OH-23C (UH-12C), H-23D / OH-23D (UH-12D), UH-12E, UH-12E3, H-23F / OH-23F (UH-12E-4), H-23G, HTE-1 (UH-12B), HTE-2 (H-23B), Hiller HT Mk 1 (

[Photo-ID: 10818] © Karsten Palt 2015-04-04
	Hiller 360 UH-12B Reg.: F-BNGM c/n: 699
Musee de l Air et de l Espace [Paris Le Bourget]

[Photo-ID: 6486] © Karsten Palt 2013-02-09
	Hiller 360 UH-12B Royal Thai Air Force (RTAF) Reg.: 4 c/n: 597
Royal Thai Air Force Museum [Bangkok]

[Photo-ID: 1954] © Karsten Palt 2009-04-04
	Hiller 360 UH-12B Swiss Air Force / Schweizer Luftwaffe Reg.: KAB-202 c/n: 607 fake reg., ex D-HAHE
Flieger Flab Museum [Dübendorf (LSMD)]

[Photo-ID: 7759] © Karsten Palt 2013-09-01
	Hiller H 23 C United States Army Reg.: 55-4109 c/n: 814
Hubschraubermuseum Bueckeburg [Bueckeburg]

[Photo-ID: 7760] © Karsten Palt 2013-09-01
	Hiller H 23 C United States Army Reg.: 55-4109 c/n: 814
Hubschraubermuseum Bueckeburg [Bueckeburg]

[Photo-ID: 5592] © Karsten Palt 2012-04-29
	Hiller OH-23G Raven Republic of Korea Army Reg.: 15-205 c/n: 1714
The War Memorial of Korea [Seoul]

[Photo-ID: 1080] © Karsten Palt 2008-07-11
	Hiller UH-12C Bristow Helicopters Reg.: G-ASTP c/n: 1045
The Helicopter Museum [Weston-super-Mare]

[Photo-ID: 2493] © Karsten Palt 2009-06-25
	Hiller UH-12C / OH-23C Royal Netherlands AF / Koninklijke Luchtmacht Reg.: O-36 c/n: 937
Militaire Luchtvaart Museum [Soesterberg]

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