Complement
1,204 crew and 1,871 troops
Manufacturer
Northrop Grumman Shipbuilding
Operator
US Navy
Length
257.2m
Beam
32.3m
Displacement
44,854t
Speed
20kt
Range
9,500 miles
Missiles
2 × rolling airframe missile launchers, 2 × evolved Sea Sparrow missile launchers
CIWS
2 × 20mm Phalanx CIWS mounts
Guns
7 × twin .50 BMG machine guns
Engines
2 × LM2500+ gas turbines
Electric Motors
2 × 5,000hp auxiliary propulsion motors
Shafts
Two
Aircraft Carried
F-35B Lightning II, MV-22B Osprey, CH-53E Super Stallion or CH-53K Super Stallion, UH-1Y Venom, AH-1Z Viper and MH-60S Seahawk
The America Class amphibious assault ships are being worked by Northrop Grumman Shipbuilding for the US Navy. These boats are proposed to supplant the Tarawa Class amphibious attack ships. Recently known as LHA (R), the principal transport, USS America (LHA-6) was conveyed in April 2014 and dispatched in October 2014. US America is the fourth ship in the US Navy to bear the name.
In June 2007, the US Navy signed a $2.4bn fixed-price incentive contract with Northrop Grumman for the detail design and construction of the amphibious assault ship, LHA 6. The keel was laid down at Northrop Grumman’s Ingalls shipyard in July 2009.
In June 2010, Northrop Grumman was awarded a $175m advance procurement contract for LHA 7 by the US Navy. These funds will be used for the procurement of long-lead time materials and major equipment for the new vessel and to execute initial design and planning. The work is being carried out at the Gulf Coast facilities of the company. LHA-7, named USS Tripoli, was laid down in June 2014 and her commission is planned in 2018.
In June 2016, the US Navy signed a $272.47m contract with Ingalls Shipbuilding for the construction of LHA 8. The contract also includes options which will bring the value of contract to $3.1bn, when exercised.
USS America (LHA-6) amphibious assault ship design
In view of the frame structure of USS Makin Island (LHD-8), USS America (LHA-6) is furnished with a gas turbine drive framework. The design incorporates several modifications to complement aviation operations and support activities. The well deck has been changed over into an all-encompassing shelter deck and incorporates two wide and high straight territories. An overhead crane is introduced in each narrows territory for airplane upkeep.
The structure likewise incorporates a reconfigurable order and control focus, a medical clinic, extra flying fuel storerooms and aeronautics uphold territories. These progressions empower the boat to serve joint, between office and transnational oceanic powers.
The America Class transport has a general length of 257.2m and a beam of 32.3m. The displacement of the vessel is 44,971t. The hybrid propulsion system provides a maximum speed of more than 20k. The ship can accommodate 1,204 crew, 1,871 troops.
America Class aircraft capabilities
The vessel has hangar large enough to accommodate aircraft movement.The boat likewise has expanded flight fuel limit, and capacity for avionics parts and backing gear. With its 45,000t removal and supplement of strike contenders, it can serve in the little transporter job.
The America Class can accommodate 12 MV-22B Osprey tilt-rotor aircraft, six STOVL F-35B Lightning II joint strike fighters, four AH-1Z attack helicopters, four CH-53Ks and three UH-1Y utility helicopters. The boat can likewise uphold load activities, assault helicopters and the AV-8B Harriers. The specific design of the boat's airplane supplement differs dependent on its strategic.
America Class missiles
The America Class land and/or water capable attack ships are furnished with two moving airframe rocket launchers and two developed Sea Sparrow rocket (ESSM) launchers. ESSM launchers are utilized against approaching rockets, airplane and other surface dangers.
Naval guns
The ship is fitted with seven twin .50-calibre Browning machine guns. Two 20mm Phalanx close-in weapon systems (CIWS) will also be mounted on the vessel. The phalanx CIWS provides self-defence against anti-ship missiles and close-in air and surface threats.
Countermeasures
The America Class ships are fitted with the ship self-defence system (SSDS) developed by Raytheon. SSDS comprises software and commercial off-the-shelf hardware. It integrates radars with anti-air weapons, including hard-kill (missiles and rapid fire gun systems) and soft-kill (decoys).
The SSDS receives data from individual radars, the electronic support measures system (radar warning receiver) and the identification-friend or foe system. It forms a composite track from this data which is used to identify, prioritise and track threats.
The system gives last layer of self-insurance against hostile to deliver journey rockets, including subsonic (Mach 0.9) and supersonic (Mach 2+) low-elevation variations.
Propulsion
The ship is powered with hybrid mechanical to electric propulsion system. The system consists of two LM2500+ gas turbines and two 5,000hp auxiliary propulsion motors. Each gas turbine is rated at 35,290shp, provides speeds in excess of 22kt.
The propellers are driven either by the gas turbines or by the electric motors. The on-board service electrical system powers the electric motors.The system permits the boat to run in a more eco-friendly mode over its speed range.
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