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Sikorsky H-34 / CH-34 Choctaw

Transport / Close-Support Helicopter

Sikorsky H-34 / CH-34 Choctaw

Transport / Close-Support Helicopter


The Sikorsky H-34 Choctaw served with the USAF, US Army, USMC, USN and the USCG during its tenure in American hands.
National Flag Graphic
ORIGIN: United States
YEAR: 1954
STATUS: Retired, Out-of-Service
MANUFACTURER(S): Sikorsky Aircraft - USA / Westland - UK / Sud-Aviation - France
OPERATORS: Argentina; Australia; Belgium; Brazil; Cambodia; Canada; Chile; Taiwan; Costa Rica; France; Germany; Greece; Haiti; Indonesia; Italy; Iran; Israel; Japan; Katanga; Laos; Nicaragua; Philippines; Peru; South Vietnam; Spain; Turkey; Thailand; United States; Uruguay
National flag of Argentina
National flag of Australia
National flag of Belgium
National flag of Brazil
National flag of Cambodia
National flag of Canada
National flag of Chile
National flag of France
National flag of Germany
National flag of Greece
National flag of Indonesia
National flag of Iran
National flag of Israel
National flag of Italy
National flag of Japan
National flag of Laos
National flag of Nicaragua
National flag of Peru
National flag of Philippines
National flag of South Vietnam
National flag of Spain
National flag of Taiwan
National flag of Thailand
National flag of Turkey
National flag of United States
National flag of Uruguay
Technical Specifications

Unless otherwise noted the presented statistics below pertain to the Sikorsky H-34A / CH-34A Choctaw model. Common measurements, and their respective conversions, are shown when possible.
POWER: 1 x Wright R-1820-84 radial engine developing 1,525 horsepower and driving a four-bladed main rotor and a four-bladed tail rotor.








nautical miles

OPTIONAL, VARIOUS: Dependent upon on mission parameters. As a gunship, the Choctaw was fitted with:

2 x M60C General Purpose Machine Guns
2 x 19-shot 2.75" rocket pods
Graphical image of an aircraft medium machine gun
Graphical image of an aircraft rocket pod
Variants / Models

• H-34A - US Army Variant; fitted with R-1820-84 engine of 1,525 horsepower; 359 examples produced; 21 Army models sent to US Navy; re-designated to CH-34A beginning in 1962.
• JH-34A - Developmental H-34A model used in weapons testing.
• VH-34A - Staff Transport Model based on the H-34A/CH-34A.
• H-34B - Based on H-34A/CH-34A production models with subtle changes; re-designated to CH-34B beginning in 1962.
• H-34C - Based on H-34B/CH-34B production models with subtle changes; redesignated to CH-34C beginning in 1962.
• JH-34C - Developmental Model based on H-34C/CH-34C used in weapons testing.
• VH-34C - Staff Transport Model based on the H-34C/CH-34C.
• HH-34D - Choctaws given USAF serial numbers for transfer under the Mutual Defense Assistance Act.
• LH-34D - Re-designated from HUS-1L beginning in 1962.
• UH-34D - Re-designated from HUS-1 beginning in 1962; at least 54 production examples appeared as "new-build" models.
• VH-34D - Re-designated from HUS-1Z beginning in 1962; staff transport model.
• UH-34E - Re-designated from HUS-1A beginning in 1962.
• HH-34F - Re-designated from HUS-1G beginning in 1962.
• YSH-34G - Re-designated from YHSS-1/XHSS-1 beginning in 1962.
• SH-34G - Re-designated from HSS-1 beginning in 1962.
• SH-34H - Re-designated from HSS-1F beginning in 1962.
• YSH-34J - Re-designated from YHSS-1N beginning in 1962.
• SH-34J - Re-designated from HSS-1N beginning in 1962.
• UH-34J - Based on the SH-34J; sans Anti-Submarine Warfare (ASW) equipment; utility transport and trainer model.
• HH-34J - Former USN models now utilized by the USAF.
• VH-34J - Based on the SH-34J; staff transport model.
• XHSS-1 "Seabat" - US Navy evaluation Choctaws; three examples delivered as such; later re-designated to YHSS-1 then becoming the YSH-34G beginning in 1962.
• HSS-1 "Seabat" - Anti-Submarine Warfare platform for use by the USN; 215 examples produced; re-designated to SH-34G beginning in 1962.
• HSS-1F "Seabat" - Developmental Model based on HSS-1; fitted with 2 x General Electric YT-58-GE engines; re-designated to SH-34H beginning in 1962.
• YHSS-1N "Seabat" - Single Prototype Model; HSS-1 converted to HSS-1N; re-designated to SH-34H beginning in 1962.
• HSS-1N "Seabat" - Bad Weather/Night Model based on HSS-1; fitted with revised autopilot system and avionics suite; 167 examples produced; re-designated to SH-34J beginning in 1962.
• HUS-1 "Seahorse" - USMC Transport Model based on the HSS-1; 462 examples produced; re-designated to UH-34D beginning in 1962.
• HUS-1A "Seahorse" - Amphibious Conversion Model fitted with pontoons; 40 examples produced; becoming the UH-34E beginning in 1962.
• HUS-1G "Seahorse" - USCG model based on the HUS-1; six total examples produced; re-designated to HH-34F beginning in 1962.
• HUS-1L "Seahorse" - Antarctic Conversion Models; four examples converted in this fashion; re-designated to LH-34D beginning in 1962.
• HUS-1Z "Seahorse" - VIP Passenger Transport; 7 HUS01 models converted as such; re-designated to VH034D beginning in 1962.
• S-58 - Commercial Cargo Transport Model
• S-58B -Commercial Cargo Transport Model
• S-58C - Commercial Utility Model
• S-58D - Commercial Utility Model
• S-58T - Commercial Passenger Transport with turboshaft engines.
• S-58 "Heli-Camper" - Commercial Passenger Transport; fitted with Wright Cyclone R-1820-24 engines.
• Orlando Airliner - Commercial Transport Transport with seating for 18.
• Westland Wessex - British license-production Choctaws as used by the Royal Navy in the ASW.


Detailing the development and operational history of the Sikorsky H-34 / CH-34 Choctaw Transport / Close-Support Helicopter.  Entry last updated on 5/19/2018. Authored by Staff Writer. Content ©
The H-34 Choctaw was a multi-purpose, radial-powered utility helicopter produced by Sikorsky in the United States. It was developed as a replacement for the similar Korean War-era UH-19 Chickasaw series of helicopters and designed from the outset as an Anti-Submarine Platform for use by the United States Navy. Its operational capabilities eventually led to its use by the United States Army, United States Air Force, the United States Marine Corps and the United States Coast Guard. The Choctaw also went on to prove a commercial success, being fielded in the ranks by no fewer than 27 foreign partners including some limited license production of the type. The Choctaw saw notable service in the Vietnam War. First flight of the system was achieved on March 8th, 1954.

Visibly, the Choctaw wasn't going to win any design awards based on looks alone. It was a far cry from being the best looking of Cold War creations but it was an vast upgrade from the utilitarian approach of the H-19 Chickasaw before it. Design of the H-34 was stout, featuring a large set rounded nose with a raised flightdeck. The pilot and co-pilot sat in their raised positions ahead of the powerplants and above and forward of the passenger/cargo cabin. Entry into the system was provided for by a large rectangular access door (sliding aft) located on the starboard side of the lower fuselage. The underside of the fuselage maintained a predominantly straight appearance, giving the Choctaw its unique profile. The undercarriage was fixed and consisted of two main landing gears supported by exposed struts and a single tail wheel. The main landing gear systems were positioned just forward of the passenger cabin and fitted with a large single wheel each. Power was generally supplied by a Wright R-1820-84 Cyclone radial engine delivering up to 1,525 horsepower and driving a four-bladed main rotor and a four-bladed tail rotor. While the operational crew amounted to two personnel, the cabin had space for up to 16 combat-ready troops, 18 passengers or 8 medical litters. A top speed of 173 miles-per-hour was listed as was a range of 182 miles.

The Choctaw lived a long service live under many guises beginning as the HSS-1 "Seabat" for the United States Navy (in its Anti-Submarine Warfare role). This was coupled with the similar HUS-1 "Seabat" utility transport. The "Seabat" series consisted of US Navy Choctaws built to anti-submarine warfare specifications initially appearing as three Sikorsky S-58 models for evaluation as XHSS-1 prototype systems. The XHSS-1 then became the YHSS-1 before ultimately being re-designated to YSH-34G. The first production models became the HSS-1 "Seabat". The HSS-1N "Seabat" was of note as it was a dedicated bad weather/night version fitting improved autopilot and avionics systems. Seabats fell under the designation of SH-34 beginning in 1962.

The "Seahorse" series was operated primarily by the US Marine Corps and the US Coast Guard. These were noted by their designation of "HUS" as in the HUS-1, HUS-1A, HUS-1G, HUS-1L and the HUS-1Z. These eventually became the UH-34 "Seahorse" series beginning in 1962. The United States Coast Guard operated the Choctaw from 1959 through 1962.

The US Army fielded the H-34A model (later becoming the CH-34). It was the US Army, in fact, that gave the helicopter the name of "Choctaw" beginning in 1962 to which the USAF also applied to their delivered units. These were fitted with R-1820-84 radial engines of 1,525 horsepower. A staff transport version was also developed and noted for the use of "V" in its designation (VH-34A). The slightly different H-34B and H-34C soon followed as did several developmental weapon test beds. The US Army operated the Choctaw well into the early 1970's, by which time Sikorsky had completed all production of the type.

Sikorsky H-34 / CH-34 Choctaw (Cont'd)

Transport / Close-Support Helicopter

Sikorsky H-34 / CH-34 Choctaw (Cont'd)

Transport / Close-Support Helicopter

It should be noted that the US military restructuring of 1962 forced a change to all designations of operational aircraft at the time, hence the mentions above. As such, the H-34A were now referred to as the CH-34A. Likewise, the H-34B was now the CH-34B and so on. See the variants listing for a full report of the designation changes.

Commercial Choctaws were available in a variety of configurations. These were noted by their Sikorsky "S-" designations becoming the S-58 base cargo model, the S-58B improved cargo model, the S-58C passenger airliner/transport model, the S-58D freighter/airliner model, the S-58T conversion models fitted with turboshafts instead of radials, the S-58 "Heli-Camper" fitting Wright Cyclone R-1820-24 series engines and the "Orlando Airliner" 18-seat passenger transport.

The Choctaw was produced overseas via license-production in France and in Britain. The French received one batch of 134 Choctaws in parts from the United States and assembled them under the Sud-Aviation banner. A further 166 were manufactured on French soil as new-build Choctaws for the French Army, Navy and Air force, these again produced by Sud-Aviation. The British took to building their Choctaws under the Westland brand label and afforded the system the designation of "Wessex" with the Royal Navy becoming a notable operator of these machines (turbine-powered), utilizing them in the Anti-Submarine Warfare (ASW) role. Other British-produced Wessex's were marketed to foreign military and civilian operators.

Operators of the Choctaw covered the globe with use by Argentina, Australia, Belgium, Brazil, Canada, France, Germany, Greece, Indonesia, Japan, Israel, Italy, Philippines, South Vietnam, Spain, Turkey and Thailand to name a few.

Perhaps its most notable use was in the hands of US forces in the Vietnam War. Though initially delayed into action, some twenty US Army CH-34's made their way into the theater and was utilized wherever necessary. This included MEDEVAC roles, cargo transport for supply and resupply and as an offensive weapons platform. In the latter role, the CH-34 became one of the earliest attempts by American warplanners to arm a helicopter to be used as a gunship. These Choctaws (known as "Stingers") sported two M60C series general purpose machine guns and 2 x 2.75" 19-shot rocket pods comprising the TK-1 (Temporary Kit-1) later used on the successful Bell UH-1 "Huey" line of gunships. The Choctaw operated in the theater for a surprisingly lengthy period of time, proving a reliable workhorse in the process. Even the arrival of the fabled Huey systems did not force the Choctaw completely from the action as Choctaws were still in service with the USMC even after the introduction of the UH-1 series. All remaining CH-34's were eventually handed over to the South Vietnamese government as American involvement in the conflict drew to a close.

Some 1,800 Choctaws were eventually produced.


Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed
Hi: 200mph
Lo: 100mph
This entry's maximum listed speed (173mph).

Graph average of 150 miles-per-hour.
City-to-City Ranges
Graph showcases the Sikorsky H-34A / CH-34A Choctaw's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production (1,800)
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.

Altitude Visualization
Small airplane graphic
Supported Roles
Ground Attack
Aerial Tanker
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Commitments / Honors
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.

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