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US Navy : admission au service aujourd'hui du porte-aéronef d'assaut amphibie LHA-6 America, 1ère unité d'une nouvelle classe

US Navy : admission au service aujourd'hui du porte-aéronef d'assaut amphibie LHA-6 America, 1ère unité d'une nouvelle classe | Newsletter navale | Scoop.it

USS America (LHA-6) — the first in a new class of aviation centric amphibious warships — will commission on Saturday in San Francisco, according to a statement from the U.S. Navy.

The 45,000-ton ship, and its crew of 1,200 sailors, is equipped to transport 1,900 Marines and their aircraft as part of a three ship Amphibious Ready Group with an embarked Marine Expeditionary Unit (ARG/MEU).

The ship arrived in San Francisco on Oct. 7 as part of the city’s Fleet Week.

“This ship, forged in America, with components and systems manufactured all across America, shall remind us of the long and historic links between our communities and our Navy and Marine Corps,” Secretary of the Navy Ray Mabus said in a Friday statement. “Having a ship named America, sailing the world’s oceans, always present in defense of our freedoms and ready to respond is yet another extension of our American spirit.”

The ship was designed without a well-deck — a feature that allows amphibious to deploy landing craft— to allow space to support the Navy and Marines aviation detachment and the eventual inclusion of the short takeoff and vertical landing variant of the F-35B Lighting II Joint Strike Fighter (JSF).

Follow on ship, Tripoli (LHA-7), will be built without a welldeck while the yet unnamed LHA-8 will be redesigned to include the capability.

America will directly replace the last Tarawa-class amphibious warship — USS Peleliu (LHA-5). Peleliu is planned to be decommissioned in 2015 and enter the Navy’s reserve fleet, according to the Navy’s latest long-range shipbuilding plan.

The ship will be based at Naval Station San Diego, Calif.

Patrick H. 's insight:

On peut même employer le terme de porte-avions pour désigner ces bâtiments :

http://lignesdedefense.blogs.ouest-france.fr/archive/2012/10/23/uss-america-le-petit-dernier-des-il-faut-le-dire-porte-avion.html

La tête de série, le LHA-6 America avait déjà été livré à l'US Navy en avril dernier pour évaluation et certification :

http://www.scoop.it/t/newsletter-navale/p/4019497149/2014/04/12/huntington-ingalls-transfere-le-batiment-d-assaut-amphibie-uss-america-lha-6-a-l-u-s-navy-asa-prevue-en-fin-2014

Ces bâtiments (comme le LHD-8 Makin Island) sont dotés d'une propulsion hybride articulée autour de deux turbines à gaz et de deux moteurs électriques de 5000 cv. Ces derniers, utilisés pour les vitesses lentes (jusqu'à 12 noeuds), permettent de réduire significativement la consommation énergétique du navire.

Contrairement aux précédents porte-hélicoptères d’assaut américains, les LHA-6 et LHA-7 (en construction) ne disposent pas de radier permettant d’abriter des engins de débarquement (chalands ou LCAC). Une situation qui ne convient pas à l’USMC, qui a obtenu que les cinq autres unités suivantes soient pourvues d’un radier.

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Huntington Ingalls transfère le bâtiment d'assaut amphibie USS America (LHA 6) à l'U.S. Navy (ASA prévue en fin 2014)

Huntington Ingalls transfère le bâtiment d'assaut amphibie USS America (LHA 6) à l'U.S. Navy (ASA prévue en fin 2014) | Newsletter navale | Scoop.it

The U.S. Navy officially accepted delivery of the amphibious assault ship America (LHA 6) from Huntington Ingalls Industries during a ship custody transfer ceremony in Pascagoula, Miss., April 10. More than 900 Sailors and Marines assigned to Pre-Commissioning Unit (PCU) America marched to the ship to take custody on the flight deck.

America is the first ship of its class, replacing the Tarawa-class of amphibious assault ships. As the next generation "big-deck" amphibious ship, America will be optimized for aviation and capable of supporting current and future aircraft, such as the tilt-rotor MV-22 Osprey and the Joint Strike Fighter.

The ship will provide flexible, multi-mission capabilities spanning from forward-deployed crisis response to maritime security operations.

America is 844 feet long, 106 feet wide and hosts a displacement of 44,971 long tons. Her propulsion system will drive it to speeds in excess of 22 knots, and she will accommodate a crew size of more than 1,100 Sailors and nearly 1,900 embarked Marines.

With the ship custody transfer complete, the crew is now working and living aboard the ship. After a rigorous evaluation and certification cycle, the ship will depart Mississippi and transit around South America to her future homeport of San Diego. America is scheduled to be commissioned late 2014 in San Francisco.

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Vidéo : les essais constructeur à la mer du bâtiment d'assaut amphibie LHA-6 USS America

The new amphibious assault ship AMERICA (LHA 6) took to the sea for the first time Nov. 5, carrying out five days of builder’s sea trials in the Gulf of Mexico.

Built by Huntington Ingalls Industries at their Ingalls shipyard in Pascagoula, Miss., the AMERICA was put through more than 200 test events. Engineers checked the operation of the gas turbine/electric-powered propulsion system, along with anchor handling, flight operations, and combat systems’ evaluations. The ship was operated by Ingalls employees assisted by members of the ship’s Navy crew.

“The Ingalls team and the ship performed very well,” said Richard Schenk, Ingalls’ vice president of test and trials.

Navy observers were also pleased with the trials.

“The ship performed well at sea and largely exceeded my expectations. The state of completion is right where it should be for builder’s trials,” said Capt. Chris Mercer, Amphibious Warfare program manager for the Program Executive Office, Ships. “Our joint government and industry team comprehensively tested every aspect of the ship’s equipment and systems, and the results leave us with a clear path to a successful acceptance trials and delivery next year.”

The AMERICA and her sister ship TRIPOLI are the first big-deck assault ships not built with an internal well deck. Rather, the ships are optimized to support Marine Corps aviation combat elements with additional aviation maintenance capability, increased fuel capacity and a significant increase in available stowage for parts and support equipment. The ships use the same fuel and energy-saving propulsion plant, zone electrical distribution and electric auxiliary systems installed in the MAKIN ISLAND (LHD 8).

America-class ships are 844 feet long and 106 feet wide and displace 44,971 long tons. The gas-turbine propulsion system drives the ships in excess of 20 knots. They will accommodate a crew of 1,059 (65 officers) and 1,687 troops. The America-class will be capable of carrying a Marine Expeditionary Unit, including Marine helicopters, MV‐22 Osprey tiltrotor aircraft and F‐35B Joint Strike Fighter (JSF) aircraft.

Ingalls now is preparing the AMERICA for acceptance sea trials in late January, when the Navy’s Board of Inspection and Survey (INSURV) will be aboard to determine if the ship is ready for delivery.

The AMERICA is scheduled to enter service in 2014, homeported at San Diego.

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Mise en chantier du porte-aéronef d'assaut amphibie LHA-7 Tripoli, 2ème unité de la classe America (45.000 t)

Mise en chantier du porte-aéronef d'assaut amphibie LHA-7 Tripoli, 2ème unité de la classe America (45.000 t) | Newsletter navale | Scoop.it

The keel for the next-generation amphibious warship Tripoli (LHA-7) was laid in a ceremony at Ingalls Shipbuilding in Pascagoula, Miss. on Friday.
The ceremony marked the official start of construction for the second America-class landing helicopter dock for the U.S., following the $3 billion first-in-class America (LHA-6) — which plans to commission later this year.

“Like America, Tripoli boasts a very credible and capable aviation centric design that replaces the Tarawa class of amphibious assault ships,” Capt. Christopher Mercer, Amphibious Warfare Program Manager within Program Executive Office (PEO) Ships said in a Naval Sea Systems Command (NAVSEA) statement.
“The design brings with it increased capabilities and will maximize the Navy’s investment in future aircraft.”

Each of the 45,000-ton ships in the class are optimized for modern Marine aircraft like the MV-22 tilt-rotor Osprey and the short takeoff-vertical landing (STOVL) F-35B Lighting II Joint Strike Fighter (JSF).

However, America and Tripoli were designed without a well deck — which allows a ship to take on and disembark amphibious landing craft — much to the protest of the Marine Corps.

LHA-8 will be redesigned to incorporate a well deck into the design.

Patrick H. 's insight:

On peut même employer le terme de porte-avions pour désigner ces bâtiments :

http://lignesdedefense.blogs.ouest-france.fr/archive/2012/10/23/uss-america-le-petit-dernier-des-il-faut-le-dire-porte-avion.html

La tête de série, le LHA-6 America a été livré à l'US Navy en avril dernier :

http://www.scoop.it/t/newsletter-navale/p/4019497149/2014/04/12/huntington-ingalls-transfere-le-batiment-d-assaut-amphibie-uss-america-lha-6-a-l-u-s-navy-asa-prevue-en-fin-2014

Le contrat de construction du LHA-7 Tripoli avait été signé en 2010 :

http://www.meretmarine.com/fr/content/us-navy-contrat-pour-un-second-porte-helicopteres-de-la-classe-america


Ces bâtiments (comme le LHD-8 Makin Island) sont dotés d'une propulsion hybride articulée autour de deux turbines à gaz et de deux moteurs électriques de 5000 cv. Ces derniers, utilisés pour les vitesses lentes (jusqu'à 12 noeuds), permettent de réduire significativement la consommation énergétique du navire.

Contrairement aux précédents porte-hélicoptères d’assaut américains, les LHA 6 et LHA 7 ne disposent pas de radier permettant d’abriter des engins de débarquement (chalands ou LCAC). Une situation qui ne convient pas à l’USMC, qui a obtenu que les cinq autres unités suivantes soient pourvues d’un radier.

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Le nouveau porte-aéronefs d'assaut LHA-6 USS America a terminé avec succès ses essais d'acceptation

Le nouveau porte-aéronefs d'assaut LHA-6 USS America a terminé avec succès ses essais d'acceptation | Newsletter navale | Scoop.it

The amphibious assault ship America (LHA 6) returned to Huntington Ingalls Industries’ Ingalls Shipbuilding division Friday following successful acceptance sea trials in the Gulf of Mexico. Ingalls’ test and trials team successfully demonstrated more than 220 test events to the U.S. Navy’s board of inspection and survey (INSURV).

During acceptance trials, America performed all required sea trial evolutions, including the operation of the hybrid gas turbine/electric-drive propulsion system. Other tests included anchor handling, steering demonstration, flight deck operations, and combat systems’ evaluations.

When America enters the fleet, she will be the flagship of an Expeditionary Strike Group, strategically positioning Marine Expeditionary Units ashore across a full spectrum of missions, including humanitarian, disaster relief, maritime security, antipiracy and other operations while providing air support for ground forces.

America-class ships are 844 feet long and 106 feet wide and displace 44,971 long tons. The gas-turbine propulsion system will drive the ships in excess of 20 knots. They will accommodate a crew of 1,059 (65 officers) and 1,687 troops. The America-class will be capable of carrying a Marine Expeditionary Unit, including Marine helicopters, MV‐22 Osprey tiltrotor aircraft and F‐35B Joint Strike Fighter aircraft.

The newest class has an increased aviation capacity to include an enlarged hangar deck, realignment and expansion of the aviation maintenance facilities, a significant increase in available stowage for parts and support equipment, and increased aviation fuel capacity.


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