Sep 18, 2017 04:59 UTC
he US Navy's newest America-class
amphibious assault ship has been christened
the USS Tripoli (LHA7). During a ceremony in Pascagoula, Miss., on Saturday, acting Undersecretary of the Navy Thomas Dee said the vessel "will be a force multiplier, and her crew will proudly serve our country for decades to come. I am grateful to the men and women of Ingalls Shipbuilding for their dedication and to the citizens of Pascagoula for their unwavering support as we continue to make our Navy stronger." The Tripoli is an enlarged version of the America-class of amphibious assault ships. It is 844 feet long, displaces 45,000 tons and has larger hangars and storage capacity for aircraft and helicopters. Once operational, the US Marine Corps is expected to to deploy their vertical take-off and landing version of the F-35 Lightning II on the ship.
Modern U.S. Navy Amphibious Assault Ships project power and maintain presence by serving as the cornerstone of the Amphibious Readiness Group (ARG) / Expeditionary Strike Group (ESG). LHA/LHD are a key element of the Seapower 21 doctrine pillars of Sea Strike and Sea Basing, transporting, launching, and landing elements of the Marine Expeditionary Brigade (MEB) via a combination of LCAC hovercraft, amphibious transports and vehicles, helicopters, and aircraft.
Designed to project power and maintain presence, LHA-Replacement (LHA-R, aka. LH-X, and now the New Amphibious Assault Ship or NAAS) large deck amphibious assault ships were slated to replace the US Navy’s 6 LHA-1 Tarawa Class vessels. They are based on the more modern LHD Wasp Class design, with the LHD’s landing craft and well deck removed in favor of more planes and hangar space. While its LHA/LHD predecessors were amphibious assault ships with a secondary aviation element, it’s fair to describe the America Class as escort carriers with a secondary amphibious assault role.
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Nov 16, 2011 12:47 UTC
Latest updates: Happy endings. Mostly.
LHD 8 construction
USS Makin Island [LHD-8] was built in Pascagoula, MS, as the last ship of America’s Wasp Class amphibious assault carriers. The keel was laid in February 2004, but all of the changes from the LHD-1 Wasp Class meant that about 67% of the previous line drawings, and 75% of the test procedures, needed to be modified for Makin Island. Then Hurricane Katrina hit the in-progress ship. The labor pool also took a hit, with up to 1/3 of the Gulf Coast personnel leaving the area and the company. The pool of electrical professionals was especially hard hit, and 55-60% of the LHD 8’s final labor force was under the 4-5 year threshold to be considered experienced workers.
Even so, Katrina hit back in August 2005. Which is why Northrop Grumman was surprised at the slowness of its integration and testing progress during final construction in 2008, as part of the ship’s preparation for sea trials. That led to a comprehensive review and audit – and a bill of $320-360 million to fix the ship, which was footed by Northrop Grumman:
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Aug 07, 2011 14:24 UTC
(click for details)
Submarines travel underwater, but they all need oxygen. Diesel-electric submarines need it for their engines, and must surface to get it, though modern AIP (Air Independent Propulsion) systems allow moderate power cruising for weeks at a time without surfacing. Nuclear-powered submarines can cruise at full power for years, of course, as their engines do not need air. Their crews, however, do. Hence Electrolytic Oxygen Generators (EOGs), which break up water molecules and keep the oxygen for use aboard ship.
Treadwell Corp’s Model 6L16 EOG was first introduced in 1965…
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Jul 01, 2008 13:09 UTC
New Finmeccanica acquisition DRS EW & Network Systems, Inc. in Buffalo, NY received a $6.9 million fixed-price, time and materials contract for a Gigabit Ethernet Data Multiplex System (GEDMS) for DDG 53, a Flight 1 Arleigh Burke Class AEGIS destroyer commonly known as USS John Paul Jones. Some may remember the ship’s namesake as the Scot who became the father of the American navy, and uttered the famous battle phrase “I have not yet begun to fight!”
The GEDMS is a network for Arleigh Burke Class destroyers that acts as a ship wide data transfer network for a ship’s machinery, steering, navigation, combat, alarm and indicating, and damage control systems. It was designed to replace the miles of point-to-point cabling, signal converters, junction boxes, and switchboards associated with conventional ship’s cabling. DRS will also provide a land-based GEDMS trainer, EDMS hardware, and installation and checkout repair for the DDG53 GEDMS, and the contract includes an option which would bring the cumulative value of this contract to $7 million.
USS John Paul Jones
Work will be performed in Johnstown, PA (80%) and Buffalo, NY (20%), and is expected to be complete by December 2009. This contract was procured on a limited competition basis, with 2 proposals solicited and 2 offers received via the Federal Business Opportunities website. The Naval Surface Warfare Center, Dahlgren Division in Dahlgren, VA manages the contract (N00178-08-C-2001).
Mar 09, 2008 15:33 UTC
Building the F-35
At present, F-35 Lightning II/ Joint Strike Fighter production is led by Lockheed Martin, with BAE and Northrop-Grumman playing major supporting roles, and many subcontractors below them. F-35 main production and final assembly is currently slated to take place in Lockheed Martin’s Fort Worth, TX plant, though Italy and Britain may end up getting Final Assembly and Check-Out (FACO) plants of their own.
In order to cut F-35 production cycle time, and hence production costs, the team currently produces major sections of the aircraft at different feeder plants, and “mates” the assemblies at Fort Worth. This is normal in the auto industry, but it’s a departure from the usual fighter-building process which has raw materials and individual parts or small sub-assemblies feed into production lines, then rolls finished fighters out the other end. The precise tolerances required for a stealthy fighter, however, are much more exacting than even high-end autos. To cope, Manufacturing Business Technology reports that the team has turned to an integrated array of back-end IT systems in order to manage this new process, from CATIA CAD, to Visiprise MES, TeamCenter PLM, SAP ERP, and even a locally-designed Production & Inventory Optimization System (PIOS) for manufacturing resources planning and supply chain management.
This ‘digital thread’ has been very successful for the team, with part fits showing incredible precision, and successful coordination of plants around the end schedule for key events like the Dec 18/07 F-35B rollout. The system’s ultimate goal is to cut a plane’s production cycle time from the usual 27-30 months to about a year, and lead time from order creation to printed, matched manufacturing orders from 15-20 days to 6-8 days. Read MBT’s “Fly high on a thread” to learn more.