HILLER H-23 RAVEN

H-23 SERVICE

Manufacturer: United Helicopters Inc., Palo Alto, California, USA
(In 1952, became Hiller Helicopters Corp.)
(In 1964, became Hiller Helicopter Division, Fairchild-Hiller Corp.)
(In 1973, became Hiller Aviation)
(In 1984, became Rogerson-Hiller, Port Angeles, Washington, USA)
(In 1994, became Hiller Aircraft Corp., Newark, California, USA)
Models: Model 360, UH-12
Designations: H-23 (OH-23); HTE, CH-112 (Canada)
Names: Raven; Nomad (Canada)
First official flight: (Model 360) 1948
(YH-23) ?
Factory production period: 1948 - 1990's (civil)
1949 - 1967 (military)
Primary service period: 1950 - 1960's
Last official flight: OH-23G 1968

H-23 VARIANTS

1948 Model 360 Model 360 1 Total: 0001
         
1949 Model UH-12 Model UH-12 ?  
? Model UH-12A Model UH-12A ?  
? Model UH-12B Model UH-12B ?  
? Model UH-12C Model UH-12C ?  
? Model UH-12D Model UH-12D ?  
? Model UH-12E Model UH-12E ?  
? Model UH-12L Model UH-12L ? Total: ?
         
1950 Model UH-12 YH-23 1 Total: 0001
         
1950 Model UH-12A H-23A 105  
1950 Model UH-12A HTE-1 17  
1951 Model UH-12B HTE-2 55  
1952 Model UH-12B H-23B 328 Total: 0505
         
1955 Model UH-12C H-23C 145  
1957 Model UH-12D H-23D 486 Total: 0631
         
1962 Model UH-12E4 H-23F 33  
? Model UH-12E4 H-23G 538 Total: 0571
         
1961 Model UH-12E CH-112 25  
1962 Model UH-12E Hiller HT.MK. 2 23 Total: 0048

Grand Total: 1757

H-23 PRODUCTION

Civil Helicopters

Model 360
Prototype 2-seater, single-engined,
2-bladed rotor, tricycle u/c helicopter.
Produced 1947 - 1948

Hiller Palo Alto, California

N68940 (civil reg.) ? 1 Total: 0001

Model UH-12 / A / B / C / D / E / L
As Model 360, various civil versions.
Model L is a lengthened, wider version.
Produced 1949 - 1990's

Hiller Palo Alto, California

Model UH-12 ?  
Model UH-12A ?  
Model UH-12B ?  
Model UH-12C ?  
Model UH-12D ?  
Model UH-12E / E3 / E4 / E5 ?  
Model UH-12L / L3 / L4 / SL / SL3 / SL4 ? Total: ?

Military Helicopters

YH-23
Prototype, single-engined, 2-bladed rotor,
tricycle u/c, light observation helicopter
for US Army.
Produced 1950

Hiller Palo Alto, California (UH)

50-1254 164 1 Total: 0001

H-23A
As YH-23, minor changes.
Produced 1950 - 1951

Hiller Palo Alto, California (UH)

51-3969 / 51-4018 mixed 177 to 240    
51-15966 / 51-15970
- 5 to USAF for evaluation.
mixed 112 to 173    
51-16092 / 51-16141 246 / 295 105 Total: 0105

HTE-1
As H-23A, trainer version for US Navy,
dual controls.
Produced
Hiller Palo Alto, California (E)

BuNo.125532 163    
BuNo.128637 / 128652 mixed 179 to 245 17 Total: 0017
16 additional airframes cancelled.

HTE-2
As H-23A, trainer version for US Navy,
dual controls, engine upgrade.
Produced

Hiller Palo Alto, California (E)

BuNo.129757 / 129791 mixed 304 to 420    
BuNo.134724 / 134743
- 20 to RN as Hiller HT.Mk. 1,
XB474 / XB481, XB513 / XB524.
mixed 510 to 553 55 Total: 0055

H-23B
As H-23A, engine upgrade,
skid-wheel u/c, minor changes.
Redesignated as OH-23B in 1962.
Produced

Hiller Palo Alto, California (UH)

51-16142 / 51-16414
- 4 to The Netherlands as O-32 / O-35.
mixed 296 to 669    
54-862 / 54-880
- 16 to The Netherlands as O-16 / O-31.
mixed 675 to 697    
54-881 691    
54-2915 / 54-2932 706 / 723    
54-2933 / 54-2949
- 15 to The Netherlands as O-1 / O-15.
727 / 743 328 Total: 0328

H-23C
As H-23B, 3-seater, one piece
rounded canopy, metal rotor blades.
Redesignated as OH-23C in 1962.
Produced

Hiller Palo Alto, California (UH)

55-4060 749    
55-4063 / 55-4131 mixed 753 to 838    
56-2245 / 56-2316 mixed 841 to 933    
56-4020, 56-4021
- 2 to Spain as Z.6-1, Z.6-2.
893, 894    
57-6521
- 1 to The Netherlands as O-36.
937 145 Total: 0145

H-23D
As H-23C, engine / trans. upgrade.
Most upgraded to H-23G standard.
Redesignated as OH-23D in 1962.
Produced

Hiller Palo Alto, California (UH)

55-4061, 55-4062 750, 751    
57-2982 / 57-3077 mixed 938 to 1046    
58-5398 / 58-5505 1047 / 1154    
59-2675 / 59-2786 1155 / 1266    
61-3085 / 61-3217 1271 / 1403    
62-3756 / 62-3790 1404 / 1438 486 Total: 0486

H-23E (Model UH12E) - reserved designation but not used.

H-23F
As H-23D, larger 4-seater cabin,
engine upgrade. Most to the Inter-
American Geodetical Survey.
Redesignated as OH-23F in 1962.
Produced

Hiller Palo Alto, California (UH)

59-2787 / 59-2790 2125 / 2128    
61-3218 / 61-3234 mixed 2167 to 2256    
62-12507 / 62-12512 mixed 2283 to 2308    
64-14850, 64-14851
- 2 to Uruguay as 026, 027.
2297, 2298    
65-13069 2372    
66-8039 2373    
67-14867, 67-14868
- 2 to Uruguay as 028, 029.
? 33 Total: 0033

H-23G
As H-23F, 3-seater dual control version.
Redesignated as OH-23G in 1962.
Produced

Hiller Palo Alto, California (UH)

62-3791 / 62-3831 1439 / 1479    
63-9222 / 63-9371 ?    
63-12765 / 63-12901 1480 / 1616    
64-15108 / 64-15317 1617 / 1826 538 Total: 0538
242 additional airframes cancelled.

CH-112 Nomad
As H-23G, for Canada, 3 to RCAF, 22 to Army.
Re-serialled in 1970 as: (CAF) 112261 / 112285.
Produced 1961 - 1964

Hiller Palo Alto, California

10261 / 10285 mixed 2101 to 2303 25 Total: 0025

Hiller HT.Mk. 2
As H-23G, helicopter trainer for British Royal Navy.
Produced 1962 - 1966

Hiller Palo Alto, California

(RN) XS159 / XS174 mixed 2199 to 2277    
(RN) XS700 / XS706 mixed 2280 to 2300 23 Total: 0023

 

Grand Total: 1757

H-23 CONVERSIONS

Civil Conversions

Model UH-12EL / ET / E3T / E4T / E5T / J-3

1+

Various Model UH-12, 1970's, civil turbine engine upgrades.
Model E5T not built, Model J-3 an unofficial designation.

Military Conversions

US Army

H-23B

26

1 H-23B / 25 HTE-2, re-built airframes for MDAP sales.
Assigned new s/n: 54-4009 / 54-4034.

FOREIGN MILITARY / CIVILIAN SERVICE
 - The H-23 served with the military forces of Argentina, Biafra, Bolivia, Canada,
   Chile, Colombia, Cuba, Dominican Republic, Egypt, Guatemala, Guyana,
   Indonesia, Israel, Japan, Mexico, Morocco, The Netherlands, Paraguay, Peru,
   Sri Lanka, Switzerland, Thailand, United Kingdom, Uruguay and West Germany.
 - Many sold on the civil market for both commercial and private roles.

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