.: Kevin Armitage's Academy Korean War "M*A*S*H" Bell 47D (Military version known as H-13 Sioux)

Modelling Time:
~14 months
PE/Resin Detail:

"Frustrating Build due to poorly fitting & warped parts! "

Bell H-13 Sioux

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This article is about the military versions of the Bell 47 models. For the civil versions, see Bell 47.
H-13 Sioux
An OH-13 in flight
Role Light observation helicopter
National origin United States
Manufacturer Bell Aircraft / Bell Helicopter
First flight 8 December 1945 (Bell 47 prototype)[1]
Status Retired
Primary users United States Army
United States Air Force
United States Navy
British Army
Number built At least 2,407
Developed from Bell 47
Variants H-13J Sioux
Bell 207 Sioux Scout

The Bell H-13 Sioux was a two-bladed, single engine, light helicopter built by Bell Helicopter. Westland Aircraft manufactured the Sioux under license for the British military as the Sioux AH.1 and HT.2.


In 1947, the United States Army Air Forces (later the United States Air Force) ordered the improved Bell Model 47A. Most were designated YR-13 and three winterized versions were designated YR-13A. The United States Army first ordered Bell 47s in 1948 under the designation H-13. These would later receive the name Sioux.[2]

[icon] This section requires expansion with: Fill in some details on early development. (March 2009)

Initially, the United States Navy procured several Bell 47s, designated HTL-1, between 1947 and 1958. The United States Coast Guard evaluated this model, and procured two HTL-1s for multi-mission support in the New York Harbor. The most common U.S. Navy version of the 47 was designated the HTL-4, and dispenses with the fabric covering on the tail boom. The U.S. Coast Guard procured three HTL-5s in 1952 (similar to the HTL-4 but powered by a Franklin O-335-5 engine) and used these until 1960.[3] The Coast Guard procured two of Bell's Model 47G and designated them HUL-1G in 1959.[3]

The H-13 was used as observation helicopter early in the Vietnam War, before being replaced by the OH-6 Cayuse.

The Bell 47 was ordered by the British Army as the Sioux to meet specification H.240, with licensed production by Westland Helicopters. In order to comply with the terms of its licence agreement with Sikorsky Aircraft, which prevented it building a U.S. competitors aircraft, Westland licenced the Model 47 from Agusta, who had purchased a license from Bell.[4] the first contract was for 200 helicopters. The first 50 helicopters of the contract were built by Agusta at Gallarate in Italy followed by 150 built by Westland at Yeovil. The first Westland Sioux made its maiden flight on 9 March 1965.[5]

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