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Bell AH-1J SeaCobra

Dedicated Two-Seat Attack Helicopter

Bell AH-1J SeaCobra

Dedicated Two-Seat Attack Helicopter

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
MEDIA
OVERVIEW



The Bell AH-1 SeaCobra became a USMC derivative of the original U.S. Army AH-1 HueyCobra attack helicopter with changes implemented to suit the service.
National Flag Graphic
ORIGIN: United States
YEAR: 1970
STATUS: Active, Limited Service
MANUFACTURER(S): Bell Helicopter Textron - USA
PRODUCTION: 251
OPERATORS: Iran; United States
SPECIFICATIONS



Unless otherwise noted the presented statistics below pertain to the Bell AH-1J SeaCobra model. Common measurements, and their respective conversions, are shown when possible.
CREW: 2
LENGTH: 53.35 feet (16.26 meters)
WIDTH: 43.96 feet (13.4 meters)
HEIGHT: 13.71 feet (4.18 meters)
WEIGHT (EMPTY): 6,614 pounds (3,000 kilograms)
WEIGHT (MTOW): 10,009 pounds (4,540 kilograms)
ENGINE: 1 x Pratt & Whitney Canada T400-CP-400 (PT6T-3 "Twin-Pac", limited to 1,530shp) turboshaft engine developing 1,800 shaft horsepower to two-bladed main rotor and two-bladed tail rotor.
SPEED (MAX): 175 miles-per-hour (282 kilometers-per-hour; 152 knots)
RANGE: 357 miles (575 kilometers; 310 nautical miles)
CEILING: 10,548 feet (3,215 meters; 2.00 miles)
RATE-OF-CLIMB: 1,090 feet-per-minute (332 meters-per-minute)




ARMAMENT



STANDARD:
1 x 20mm M197 triple-barrel Gatling-style gun in General Electric electric-powered chin turret.

OPTIONAL (Across four hardpoints under wingstubs):
2.75" Mk 40 / "Hydra" rocket pods (14-shot pods)
5" "Zuni" rocket pods (4-shot pods)
Hughes BGM-71A TOW Anti-Tank (AT) wire-guided air-to-surface missiles.
AIM-9M Sidewinder short-range air-to-air missiles
VARIANTS



Series Model Variants
• AH-1J "SeaCobra" - Base Series Designation; based on the U.S. Army AH-1G airframe; service entry in 1970.
• AH-1J "International" - Export model of the AH-1J
• AH-1T "Improved SeaCobra" - New main rotor; upgraded gearbox; lengthened fuselage and tailboom; BGM-71A TOW AT missile support.


HISTORY



Detailing the development and operational history of the Bell AH-1J SeaCobra Dedicated Two-Seat Attack Helicopter.  Entry last updated on 6/14/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
In the latter part of the 1960s, the United States Marine Corps (USMC) had enough interest in the new U.S. Army attack helicopter - the single-engine, two-seat Bell AH-1 "HueyCobra" - that it commissioned for a more capable twin-engine version for maritime use. The Army's AH-1G model was selected as the starting point with the most prominent change being 2 x PT6T-3 turboshafts coupled to a combining transmission system for 1,800 total shaft horsepower. The engine pairing was collectively recognized as the "Turbo Twin-Pac" and formally designated the Pratt & Whitney Canada T400-CP-400). Additional changes lay in the chin armament which added a 20mm three-barreled Gatling-style cannon in a General Electric M97 turret while, by and large, the helicopter remained faithful to the original U.S. Army offering.

The U.S. Army's AH-1 itself held origins in the famous Bell UH-1 "Huey" series transport helicopter to which the AH-1 borrowed much from the earlier Bell product though extensively modified for the dedicated attack role. The attack helicopter was used as a replacement for the several make-shift gunships in service with American forces during the Vietnam War (1955-1975). The USMC variant of the AH-1G was specifically modified to include the dual-engine layout for increased survivability, particularly in the maritime (over-water) environment that the service's helicopters were expected to operate in. The branch ordered the AH-1J through a batch of 49 helicopters in 1968.

The powerplant drove a two-blade main rotor and two-blade tail rotor, the latter set to the starboard side of the tail fin and driven by a shaft housed in the tail boom. The fuselage retained the same slim head-on profile as the AH-1G and seated its crew of two in a standard tandem arrangement - the pilot at the rear and the weapons officer/co-pilot in front. Performance included a never-exceed-speed of 220 miles per hour, a maximum speed of 175 miles per hour, a range out to 560 miles, a service ceiling up to 10,500 feet, and a rate-of-climb of 1,090 feet per minute.

The USMC introduced their "SeaCobra" during September of 1970 and first actions centered around the American involvement in Vietnam in the coastal "hunter-killer" role. The helicopters were primarily armed through multi-shot rocket pods slung under their wingstubs which held two hardpoints apiece. The AH-1J SeaCobra was then offered in an export guise as the AH-1J "International" of which Iran became an operator of.

In 1974, a new version was ordered as the AH-1T "Improved SeaCobra". This model incorporated a new main rotor (from the Bell Model 214), upgraded gearbox, and lengthened fuselage and tailboom. The mark also included support for the Hughes BGM-71A TOW anti-tank missile but the weight added by the changes led to a decrease in performance. This forced Bell to offer 2 x General Electric T700-GE-401 turboshaft engines in 1980 and this, with other modifications including broadened weapons support (Hellfire ATGM, AIM-9 Sidewinder AAM) and day/night capabilities, led to the modernized AH-1W "SuperCobra" (the "Whiskey Cobra") mark. The AH-1W itself came to life as a re-engined AH-1T intended for sale to Iran.

The AH-1J was ultimately supplanted in USMC service by the AH-1W. Twin-engined Cobras saw combat service during the 1991 Gulf War in the tank-killing role as well as the American-led invasions of Afghanistan and Iraq during the 2000s. While the AH-1W remains the standard attack helicopter for the USMC, it is being replaced by the incoming AH-1Z "Viper" mark ("Zulu Cobra") as of this writing (2014) bringing with it improved avionics, uprated engines, and a four-blade main rotor among other changes.




MEDIA









Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 200mph
Lo: 100mph
    This entry's maximum listed speed (175mph).

    Graph average of 150 miles-per-hour.
City-to-City Ranges
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  NYC
Graph showcases the Bell AH-1J SeaCobra's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Pie graph section
Pie graph section
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Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
251
251

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


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Supported Roles
A2A
Interception
UAV
Ground Attack
CAS
Training
ASW
Anti-Ship
AEW
MEDEVAC
EW
Maritime/Navy
SAR
Aerial Tanker
Utility/Transport
VIP
Passenger
Business
Recon
SPECOPS
X-Plane/Development
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Supported Arsenal
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