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VIETNAM WAR

Bell UH-1B/C Huey Cobra / Frog


Gunship Helicopter (1962)


Aviation / Aerospace

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Jump-to: Specifications

The Bell UH-1 as a helicopter gunship excelled in its given over-battlefield role when pressed into service over Vietnam.



Authored By: Staff Writer | Last Edited: 05/14/2018 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
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One of the symbols of the American involvement in the Vietnam War (1955-1975) became the ubiquitous Bell UH-1 "Huey" transport helicopter. It was excelled in the "air cavalry" role and was also pressed in to troop ferrying into and out of contested zones while also providing critical to MEDEVAC operations. Another one of the system's primary roles became that of helicopter "gunship" as the base design was modified through an array of weapons to serve alongside transport versions and provide covering fire. In this arrangement, the transports could operate with Close Air Support (CAS) immediately on hand over areas where loitering by fixed-wing aircraft proved unrealistic.

Various platforms were modified and tested by the U.S. Army during the course of the war as dedicated gunships and this included the large tandem-rotor, medium-lift Boeing CH-47 "Chinook" transport as well as the smaller Sikorsky H-34 series. Transitions generally revolved around outfitting the existing airframes with wing stubs for rocket pods/tubes and gun pods while machine guns were added at door and window stations when possible. Grenade launchers and autocannons, these fitted to turrets, and even missiles rounded out some of the weaponry tested on these vehicles. These gunships were, by and large, only interim measures until more dedicated attack platforms like the Bell AH-1 "Cobra" line came into being.

The UH-1B became the first helicopter gunship to see operational service in number anywhere in the world. All-gun models were designated "Cobras" (or "Guns") while rocket-carrying forms were known as "Frogs" and "Hogs". The use of the name "Cobra" in this instance was also the first of its kind in U.S. Army helicopter service prior to the arrival of the Bell AH-1 series mentioned prior. Eventually versions emerged that carried both guns and rocket pods. Dedicated troop transports were known simply as "Slicks" and lacked wing stubs/rocket pods but could carry side door gunners for local area suppression of enemy elements.

Cobras and Frogs/Hogs were powered by a Lycoming T53-L-11 turboshaft engine developing 1,100 horsepower while driving the two-bladed main rotor and two-bladed tail rotor. The aircraft could expect to make speeds nearing 95 miles per hour which made them fast platforms quick to respond to changing situations and also keep up with the troop transports. Both UH-1B and UH-1C Huey production models were used in the gunship role during the war.
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The UH-1 gunship was a true weapons platform and showcased the versatility of the design as a whole. The most potent of these ("Cobra" form) carried wing stubs that mounted a quad 0.30 caliber machine gun array (two guns stacked at each end point) and a single pylon for a seven- or nineteen-shot 2.75" rocket pod for a total of fourteen rockets. Alternatively miniguns could take the place of the quad 0.40 caliber machine gun arrangement (as could a cannon pod as in the "XM-31" 20mm system) and various rocket launchers were fitted over or under the wing stubs (the former as in the "XM-6 Quad Mount" system). At the nose was a powered turret fitting a 40mm M-5 automatic grenade launcher fed by a 107 round stock of projectiles. Beyond these fixed implements were M60 General Purpose Machine Guns (GPMGs) carried at each side door (or M134 trainable miniguns)), trainable and operated by dedicated gunners. A typical crew, therefore, numbered four personnel to man the various onboard systems and weapons. Night operations could be aided by trainable searchlights at the side doors as well and required additional crew to function (sighting devices were also part of this configuration).

UH-1 gunships excelled in their given role for the firepower they carried into battle was a much-needed quality of Army doctrine of the period. Helicopters had access to areas well-beyond front lines and this meant that they were usually operating in zones while taking fire. As such, the importance of suppression was highly valued by warplanners and infantry alike. The role of Huey gunships was also expanded as they formed one-half of "hunter-killer" teams when paired with lighter helicopter platforms such as Hughes OH-6 and Bell OH-58 helicopters. Alternatively, the light helicopters could be switched our for a fixed-wing attacker like the Douglas A-1 "Skyraider" which could fly low and slow enough to be effective alongside the UH-1 gunships. These observation helicopters could locate and assess enemy positions and work in tandem with the awaiting gunship who then brought its lethal payload to bear on a designated area.

Due to their excellent combat record, UH-1 gunships had a direct influence on the expediency of getting the Bell AH-1 Cobra into the skies over Vietnam. The AH-1 eventually took over direct-attack duties from the Huey gunship types during the late 1960s and, while proving effective in their own right, AH-1 helicopters lacked an inherent troop-ferrying capability which limited them tactically -particularly where MEDEVAC and troop extractions were critical to a platoon's success or failure. The Soviets learned this and added a troop cabin to their equally-excellent Mil Mi-24 "Hind" line, effectively making them armored and heavily armed "gun buses".

Specifications



Service Year
1962

Origin
United States national flag graphic
United States

Status
RETIRED
Not in Service.
Crew
4

Production
1,000
UNITS


Bell Helicopter - USA
National flag of the United States United States
(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.


Length
57.4 ft
(17.50 m)
Width/Span
47.6 ft
(14.50 m)
Height
14.8 ft
(4.50 m)
Empty Wgt
5,181 lb
(2,350 kg)
MTOW
8,818 lb
(4,000 kg)
Wgt Diff
+3,638 lb
(+1,650 kg)
(Showcased structural values pertain to the Bell UH-1B production variant)
Installed: 1 x Lycoming T53-L-11 turboshaft engine developing 1,100 horsepower while driving two-bladed main rotor and two-bladed tail rotor.
Max Speed
95 mph
(153 kph | 83 kts)
Ceiling
18,045 ft
(5,500 m | 3 mi)
Range
311 mi
(500 km | 926 nm)
Rate-of-Climb
1,600 ft/min
(488 m/min)


♦ MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
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 UH-1B production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)
Variable:
4 x 0.30 caliber machine guns on wing stubs (two per wing) OR 2 x Miniguns (one per wing).
2 x 2.75" seven-shot rocket pods (or tube arrangement) on wing stubs (one per wing) OR 2 x 24-shot tube "box" kits OR similar arrangement.
1 x 40mm M-5 automatic grenade launcher turret in chin position.


Supported Types


Graphical image of an aircraft medium machine gun
Graphical image of an aircraft Gatling-style rotating gun
Graphical image of aircraft aerial rockets
Graphical image of an aircraft rocket pod


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


UH-1 "Cobra / Gun" - All-gun variant
UH-1 "Frog / Hog" - All-rocket variant
UH-1 "Slick" - Troop transport sans wing stubs / wing armament though usually outfitted with door-mounted machine guns for local suppression.


General Assessment
Firepower  
Performance  
Survivability  
Versatility  
Impact  


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.
28
Rating is out of a possible 100 points.
Relative Maximum Speed
Hi: 100mph
Lo: 50mph
This entry's maximum listed speed (95mph).

Graph average of 75 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Bell UH-1B 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 (1,000)
1000
36183
44000
This entry's total production compared against the most-produced military and civilian aircraft types in history (Ilyushin IL-2 and Cessna 172, respectively).
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