Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Pay Chart (2023) Military Ranks
Aviation / Aerospace

Bell Model 207 (Sioux Scout)

Light Armed Scout Helicopter Demonstrator [ 1963 ]

The Bell Model 207 was forged from the UH-1B airframe and intended to satisfy a U.S. Army gunship requirement of the 1960s.

Authored By: Staff Writer | Last Edited: 02/06/2020 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

The helicopter proved its over-battlefield value across various roles during the Korean War (1950-1953) and among those in use was the stellar Bell Model 47 (detailed elsewhere on this site), a very-light-helicopter of utilitarian makeup. The Model 47 flew for the first time on December 8th, 1945 and entered service in 1946, becoming the H-13 "Sioux" by the time of Korean Conflict and production went on to reach 5,600 units before the end with operators seen worldwide.

With this in mind, Army warplanners began to envision a future where armed helicopters ruled the battlefield and the "gunship" helicopter concept was born in which in-service types were simply modified for the attack role through various means. Before long, the dedicated "attack helicopter" concept materialized and these machines would institute definitive qualities about them to make the platforms as lethal to anything on the battlefield as possible.

By the late 1950s, Bell engineers were already working on a concept for such a helicopter and unveiled a mockup of what was designated the D-255 "Iroquois Warrior" in June of 1962 - an attacker platform built atop the existing framework and powerplant of the stellar UH-1B "Huey" transport/gunship helicopter in service since 1959. The concept involved a tandem-seat cockpit and reduced fuselage width (resulting in a most slender forward profile) with armament consisting of a single grenade launcher, 20mm automatic cannon, and support for rockets and Anti-Tank Guided Missiles (ATGMs), the latter through "wingstubs" affixed to the sides of the fuselage.

Sufficiently impressed, the Army ordered a "proof-of-concept" demonstrator from the company that December, resulting in the Model 207 "Sioux Scout" itself based upon the framework of the Bell model 47 multirole performer.

The general form of the Model 47 was retained but engineers introduced all manner of streamlining and qualities more akin to modern-day attack helicopters. The cockpit involved a tandem-seat arrangement in which the aft crewmember (pilot) sat above the forward crewman (weapons specialist), giving both operators relatively excellent vision "out-of-the-cockpit". The wingstubs were, rather interestingly, seated high along the sides of the fuselage and aft of the cockpit. These appendages were intended to mount the planned ATGMs and rocket pods (while also adding the natural effect of stabilization/improved controlling lacking in the Model 47). The primary, standard armament was an Emerson Electric TAT-101 powered turret in the "chin" position fitting 2 x M60 General Purpose Machine Guns (GPMGs). Traversal of this unit would allow some flexibility to any forward attack by offering broad firing arcs.

While on the ground, the helicopter sat on a fixed, four-point, twin-skid assembly giving a rugged quality to the machine while also simplifying maintenance and operating costs. The main rotor was positioned atop a thin mast and consisted of a simple two-bladed arrangement. The tail rotor unit was of equally-simplistic two-bladed design and faced the starboard side of the helicopter, encapsulated in a thin protective ring to shield it against ground strikes.

Power for the Model 207 became a single Lycoming TVO-435-A1A 6-cylinder air-cooled piston engine developing 260 horsepower driving both the main rotor and tail rotor blades in unison.

In its modified form, the Model 207 achieved first-flight on June 27th, 1963 and offered improved performance and handling over the original Model 47. During the remainder of its developmental phase, the structure underwent various changes to exact any and all performance from the existing airframe. The completed model was then handed over to the Army for testing before the end of the year and evaluations followed during 1964 - resulting in lessened interest in the machine on the part of the U.S. Army with shortcomings cited as lacking the required power and size for the attack requirement.

Based on this showing, however, the service evolved their needs to establish the "Advanced Aerial Fire Support System" (AAFSS) program which eventually involved Bell's newer D-262 approach (a dimensionally smaller form of the original D-255 debuted back in 1962). This was another attack helicopter concept also based in the UH-1. The project's contract was eventually claimed by the competing Lockheed AH-64 "Cheyenne" design (detailed elsewhere on this site) which, itself, failed to materialized beyond a dozen or so prototype and developmental forms, marking Lockheed's one and only foray into the helicopter market.

The Model 207, meanwhile, fell to the pages of Army aviation history as nothing more than a footnote. Bell Helicopter would eventually find success after all this work in selling the U.S. Army on its Model 209 which entered service as the AH-1 "HueyCobra" attack helicopter - keeping the important traits established by the Model 207 all those years ago: tandem-seat cockpit, skid undercarriage, twin-bladed main and tail rotors, side-mounted wingstubs, and a powered chin turret.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.


Service Year

United States national flag graphic
United States

Development Ended.


National flag of the United States United States (cancelled)
(OPERATORS list includes past, present, and future operators when applicable)
Ground Attack (Bombing, Strafing)
Ability to conduct aerial bombing of ground targets by way of (but not limited to) guns, bombs, missiles, rockets, and the like.
Close-Air Support (CAS)
Developed to operate in close proximity to active ground elements by way of a broad array of air-to-ground ordnance and munitions options.
Intelligence-Surveillance-Reconnaissance (ISR), Scout
Surveil ground targets / target areas to assess environmental threat levels, enemy strength, or enemy movement.
X-Plane (Developmental, Prototype, Technology Demonstrator)
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.

31.7 ft
(9.65 m)
37.2 ft
(11.35 m)
9.4 ft
(2.85 m)
Empty Wgt
2,094 lb
(950 kg)
3,638 lb
(1,650 kg)
Wgt Diff
+1,543 lb
(+700 kg)
(Showcased structural values pertain to the Bell Model 207 production variant)
Installed: 1 x Lycoming TVO-435-A1A 6-cylinder, air-cooled piston engine developing 260 horsepower driving two-bladed main rotor and two-bladed tail rotor.
Max Speed
109 mph
(175 kph | 94 kts)
258 mi
(415 km | 769 nm)
900 ft/min
(274 m/min)

♦ 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 Bell Model 207 production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)
2 x 7.62mm M60 General Purpose Machine Guns in powered chin turret (Emerson Electric TAT-101 turret assembly).

OPTIONAL (On Wingstubs):
2 x SS.10 Anti-Tank Guided Missiles (ATGMs) OR 2 x Rocket Pods OR 2 x Fuel tanks.

Supported Types

Graphical image of an aircraft medium machine gun
Graphical image of an aircraft anti-tank guided missile
Graphical image of aircraft aerial rockets
Graphical image of an aircraft rocket pod
Graphical image of an aircraft external fuel tank

(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 2

Model 207 "Sioux Scout" - Base Project Designation; single flyable prototype completed.

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 Ukranian-Russian War
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.

Images Gallery

1 / 1
Image of the Bell Model 207 (Sioux Scout)
U.S. Army image from the Public Domain.


Disclaimer | Privacy Policy | Cookies

2023 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

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 (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons.

View day-by-day actions of the American Civil War with CivilWarTimeline.net. View day-by-day actions of World War II with SecondWorldWarHistory.com.

©2023 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2023 (20yrs)