Bell H-13 Sioux

Bell H-13 Sioux
Pays	Usa
Rôle	Hélicoptère d’observation léger
Premier vol	Le 8 décembre 1945
Construit	2400+

Lla Bell H-13 Sioux était un hélicoptère léger monomoteur monoroutor construit par Bell Helicopter. Westland Aircraft a fabriqué les Sioux sous licence pour l’armée britannique sous le nom de Sioux AH.1 et HT.2.

Source: Bell H-13 Sioux sur Wikipedia

Bell UH-13H Sioux Walk Around
Photographers	Vladimir Yakubov and Randy Ray
Localisation	Castle AFB Museum, Atwater
Photos	194

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Bell H-13E Sioux Walk Around
Photographer	Vladimir Yakubov
Localisation	US Army Transportation Museum, Fort Eustis,
Photos	65

Bell H-13E Sioux

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General Characteristics and Role

The Bell H-13 Sioux (military designation for the Bell Model 47) was the first helicopter certified for civil use in 1946 and became a highly successful military light utility and observation platform. The UH-13H (originally OH-13H) was one of the later, more powerful variants, based on the commercial Bell 47G-2. It featured a three-seat configuration and was widely used by the U.S. Army and Air Force for training, observation, and forward medical evacuation (MEDEVAC), often featuring iconic external stretcher panniers attached to the skid landing gear. Its exposed welded-tube tail boom and « soap bubble » canopy made it instantly recognizable.

Property	Typical Value (UH-13H)
Type	Light Utility / Observation Helicopter
National Origin	États-Unis
Fabricant	Bell Aircraft / Bell Helicopter
Service Entry (H-13 Series)	1946 (H variant c. 1956)
Crew	1 Pilot
Capacité	2 Passengers (or 2 external stretchers)
Rotor Diameter	11.32 m (37 ft 0 in)
Length (Fuselage)	9.63 m (31 ft 7 in)
Height	2.95 m (9 ft 8 in)
Gross Weight	Approx. 1,339 kg (2,952 lb)

Powerplant and Performance

Engine: 1 x Lycoming VO-435 six-cylinder, horizontally opposed piston engine.
Power Output: 250 hp (186 kW).
Rotor System: Two-bladed main rotor with a gyro-stabilizer bar for stability.
Maximum Speed: 105 mph (169 km/h).
Cruising Speed: 84 mph (135 km/h).
Service Ceiling: Approx. 4,900 m (16,100 ft).
Range: 439 km (273 mi).

Service and Cultural Impact

Military Use: The H-13 and its variants were integral to US Army operations in the Korean War, primarily for light observation and the rapid transport of wounded soldiers, saving thousands of lives.
MEDEVAC Role: The use of the H-13 for battlefield evacuation pioneered the doctrine of air ambulance operations, demonstrating the helicopter’s crucial role in military medicine.
Cultural Icon: The helicopter achieved immense worldwide fame due to its prominent appearance as the medical evacuation helicopter in the popular television series and movie *MASH* (though the show used later models for filming).
Retirement: The H-13 series was largely replaced in the U.S. Army by the Bell OH-58 Kiowa (military version of the Bell 206) and the Hughes OH-6 Cayuse, but the design continues in use globally.