H-23

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.)

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

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

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

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.