DD 21 stars at surface warfare gathering

DD 21 stars at surface warfare gathering

Walsh, Edward J

Blue and Gold on Display at SNA

Capt. Tom Bush, manager of the Navy’s Zumwalt-class (DD 21) land-attack destroyer program in the program executive office for surface strike (PEO/S), reprised the DD 21 program at the Surface Navy Association’s annual symposium in Arlington, Va., in mid-January. He said that the Navy “laid a stake in the ground” four years ago for the development of a land-attack warship that would set the standard for future Navy platforms in terms of its baseline design and warfare systems, while achieving dramatic reductions in operating and support costs and in manning. The Navy established a target ceiling of 95 personnel to crew the DD 21.

The SNA’s 2001 symposium combined anticipation for an event-filled future for surface programs with concern over budget shortfalls, and with remembrance of the surface warriors who died in the terrorist attack on the Arleigh Burke-class Aegis guided-missile destroyer USS Cole (DDG 67) in Yemen last October.

Chief of Naval Operations Adm. Vern Clark, in remarks at the symposium, warned of the “asymmetric” warfare threat represented by the attack on the Cole. He pointed out that naval forces are a “product in great demand” by the nation’s regional commanders in chief as a means of providing flexible, forwarddeployed, power-projection capabilities.

DD 21 manager Bush said that the 155mm advanced gun system being developed for the ship by United Defense LP would provide three times the barrel velocity of the Mk45 deck gun carried by today’s surface combatants. The 155 will be test-fired later this year. The DD 21 also will be armed with the Block IV tactical Tomahawk cruise missile and an advanced land-attack missile.

Another innovation in the 30-ship DD 21 program will be a revolutionary total-ship computing architecture that will provide transparent data connectivity across combat, command-and– control, and nontactical systems. The DD 21 multifunction radar, being developed by Raytheon, will incorporate planar array and advanced beamsteering technology, Bush said, and will have an automated performance– monitoring capability. In the area of ship machinery, Bush said the ship’s integrated fight-through power system-which will support an electric– drive propulsion and the ship’s service power architecture-will represent advances in power distribution, hull– space flexibility, and signature reduction.

Two industry teams-the Blue Team, led by General Dynamics Bath Iron Works and Lockheed Martin Naval Electronics & Sensor Systems; and the Gold Team, led by Litton Ingalls Shipbuilding and Raytheon’s Naval and Maritime Integrated Systems-submitted proposals in November for ship design and construction. The program office currently plans to announce the winner in April or May.

The SNA exposition provided the opportunity for the Blue and Gold teams to showcase some of the principal elements of their proposals. At a Blue Team briefing, Kelly O’Brien, human systems integration manager at Northrop Grumman, said that the team achieved a crew size in the range of 95 personnel by “starting with a crew of zero” and then identifying personnel requirements that could not be met by automated systems. She said that the team received more than 500 suggestions from fleet operators about ways to reallocate manning, and incorporated about 90 percent of the suggestions into the team’s design proposal.

The Blue Team is collaborating with an integrated electric-drive team led by General Dynamics Electric Boat, and including Northrop Grumman, Eaton Navy Controls, Westinghouse’s Electro-Mechanical group, and several other companies. The team has delivered a 6,000-horsepower permanent-magnet electric motor (PMM) to the Navy for the large-scale vehicle (LSV-2) that will be used for testing advanced submarine systems. The PMM will be among the critical electric-drive technologies expected to upgrade the capabilities of surface ships and eventually submarines.

The Gold Team is working with an electric-drive team consisting of Newport News Shipbuilding and Kaman Electro magnetics, which has built several prototype PMMs.

The Blue and Gold teams will select a gas turbine system as the DD 21 prime mover. General Electric Marine Systems has proposed several options for DD 21, including the Navy’s current LM2500 and a higher-rated LM2500+. A team consisting of Northrop Grumman Marine Systems and Rolls Royce is proposing the WR-21 intercooled recuperated (ICR) engine. The ICR was selected last fall by the U.K. Royal Navy for its Type 45D air-defense destroyer. The WR-21 has undergone more than 2,000 hours of testing and is now going through an additional 3,000 hours of endurance testing at a facility in France owned by French shipbuilder DCN.

Copyright Navy League of the United States Mar 2001

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