Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Pay Scale Military Ranks

Hughes TH-55 Osage (Model 269A)

Light Utility Helicopter (LUH) (1964)

Aviation / Aerospace

1 / 5
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.
2 / 5
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.
3 / 5
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.
4 / 5
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.
5 / 5
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.

Jump-to: Specifications

The Hughes TH-55 Osage was the U.S. Army military form of the Model 269A - Japanese industry also contributed to production totals.

Authored By: Staff Writer | Last Edited: 03/11/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
Sensing a long-standing need in the helicopter market, Hughes Helicopter turned its attention to a very-lightweight two-seat, single-engine type to interest domestic and foreign military and civilian market buyers. The result of this work became the Hughes Model 269, a Light Utility Helicopter (LUH) that, despite its seemingly toy-like appearance, was a rugged, highly versatile rotary-wing platform for many services and industries of the world. This same form established the basis for the U.S. Army's TH-55 "Osage" series - the focus of this article.

The United States Army originally became interested in the helicopter as a combat-level Light Observation Helicopter (LOH) and evaluated no fewer than five examples under the "YHO-2" designation. This was intended to succeed an aging stock of Bell OH-13 and Hiller OH-23 types then in service. Evaluations were held during 1957-1958 and used the slightly modified version of the Model 269, the "Model 269A", which did away with the exposed, skeletal truss-style tail stem and introduced a shrouded boom structure instead. However, the Army passed on the design, citing a lack of funding and the type's inability to convince Army authorities of its over-battlefield value.

The Model 269A was revisited for the role of dedicated two-seat training platform and, in this guise, was adopted for Army service under the designation of TH-55 "Osage". Deliveries ultimately totaled 792 units and its contributions were such that no replacement for this compact helicopter was found until the arrival of Bell UH-1 "Huey" training forms in 1988 - resulting in decades of American helicopter airmen being trained on the Hughes product.

The Army took delivery of the TH-55A from 1964 until 1967 and these were the standard helicopter trainers of the service for their time aloft. Several were outfitted with various engines for testing. Kawasaki of Japan also produced the TH-55/Model 269A under local license as the TH-55J, these to serve directly with the Japanese Ground Self-Defense Force (JGSDF). Kawasaki produced 38 such helicopters for the service.

The basic design of the TH-55/Model 269 carried the crew of two ( in side-by-side seating) at the bulbous cockpit/fuselage section at front. The crew shared a single console which sat ahead of them and against the bubble-style front glass panel. Views out-of-the-cockpit were excellent and controls were duplicated at each crewman's position and Army models were outfitted with standardized U.S. Army instrumentation and radio equipment. Overhead was the main rotor mast mounting a three-bladed articulated main rotor unit. The engine system was installed under and aft of the fuselage and also drove a simple two-bladed tail rotor unit facing port side. An upward-cranked tailplane was fitted to starboard. For ground support, the helicopter sat on a simple, braced four-point landing skid assembly.


Service Year

United States national flag graphic
United States

Not in Service.


Hughes Helicopters - USA / Kawasaki - Japan
National flag of modern Japan National flag of the United States Japan; United States
(OPERATORS list includes past, present, and future operators when applicable)
Special-Mission: MEDical EVACuation (MEDEVAC)
Extraction of wounded combat or civilian elements by way of specialized onboard equipment and available internal volume or external carrying capability.
Special-Mission: Search & Rescue (SAR)
Ability to locate and extract personnel from areas of potential harm or peril (i.e. downed airmen in the sea).
Intelligence-Surveillance-Reconnaissance (ISR), Scout
Surveil ground targets / target areas to assess environmental threat levels, enemy strength, or enemy movement.
Training (General)
Developed ability to be used as a dedicated trainer for student pilots (typically under the supervision of an instructor).

28.9 ft
(8.80 m)
24.9 ft
(7.60 m)
7.9 ft
(2.40 m)
Empty Wgt
893 lb
(405 kg)
1,554 lb
(705 kg)
Wgt Diff
+661 lb
(+300 kg)
(Showcased structural values pertain to the Hughes Model 269A production variant)
Installed: 1 x Lycoming HIO-360-B1A engine developing 180 horsepower while driving a three-bladed main rotor and two-bladed tail rotor.
Max Speed
90 mph
(145 kph | 78 kts)
14,633 ft
(4,460 m | 3 mi)
234 mi
(376 km | 696 nm)

♦ MACH Regime (Sonic)
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030

(Showcased performance specifications pertain to the Hughes Model 269A production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)

TH-55 "Osage" - Base Series Designation.
Model 269 - Base design model developed by Hughes Helicopters for lightweight helicopter market; two prototypes developed utilizing truss-style tail structures; first-flight in 1956 with power from Lycoming O-360-A engine.
Model 269A - Revised tail structure (solid boom type); engine and control options available.
YHO-2 - Model 269A helicopters trialed by the U.S. Army as combat-level observation helicopters; five examples evaluated during 1957 into 1958.
TH-55A - U.S. Army service models, based in the MOdel 269A, featuring U.S. Army-specific equipment and instrumentation; 792 examples delivered from 1964 into 1967.
TH-55J - Model 269A license-produced by Kawasaki for Japanese military service; 38 examples produced.

General Assessment

Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
Overall Rating
The overall rating takes into account over 60 individual factors related to this aircraft entry.
Rating is out of a possible 100 points.
Relative Maximum Speed
Hi: 100mph
Lo: 50mph
This entry's maximum listed speed (90mph).

Graph average of 75 miles-per-hour.
City-to-City Ranges
Hughes Model 269A operational range when compared to distances between major cities (in KM).
Max Altitude Visualization
Small airplane graphic
Design Balance
The 3 qualities we look at for a balanced aircraft design are altitude, speed, and range.
Aviation Era Span
Pie graph section
Showcasing era cross-over of this aircraft design.
Unit Production (830)
This entry's total production compared against the most-produced military and civilian aircraft types in history (Ilyushin IL-2 and Cessna 172, respectively).

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

Ribbon graphics not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective aerial campaigns / operations / aviation periods.


Disclaimer | Privacy Policy | Cookies

2022 Military Pay Scale Army Ranks Navy Ranks Air Force Ranks Alphabet Code DoD Dictionary American War Deaths French Military Victories Vietnam War Casualties

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org, the World Directory of Modern Military Aircraft, and SR71blackbird.org, detailing the history of the world's most iconic spyplane.

Facebook Logo YouTube Logo

www.MilitaryFactory.com • All Rights Reserved • Content ©2003-