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Investment in Design Propeller Milestone Achieved By U.S. Navy some of our current U.S. based CM93 customers... US NAVY ARIES MARINE SEACOR MARINE CELEBRITY CRUISES KEYSTONE SHIPPING AMERICAN PRESIDENT LINES BOUCHARD COASTWIDE MGMT. PRINCESS CRUISES READING & BATES ENSCO MARINE ARCO MARINE CROWLEY MARINE WOODS HOLE OCEANDGRAPHIC INSTITUTION US ARMY CORPS OF ENGINEERS HORNBECK OFFSHORE SERVICES BC FAST FERRIES HVIDE MARINE CARNIVAL CRUISE LINES MARINE TRANSPORT LINES defense ...using CM93 based systems developed by: RACAL PELAGOS MAXSEA ATLAS KONGSBERG SIMRAD LEICA GEOSYSTEMS, INC. LITTON MARINE SYSTEMS RAYTHEON MARINE COMPANY ADVANCED MARINE TECHNOLOGY Q-MAR, INC. and more! 5ERV S J-s. fas zfez&ys&j If you would like more information about CM93... contact C-MAP/COMMERCIAL at 1.508.477.7537, or visit our Web Site at www.c-map.no The U.S. Navy's drive during the past decade to become more efficient on both the ship contracting and life cycle man- agement sides has proven to be much more than mere talk. The "new" Navy is embodied in the current LPD-17 project, and U.S. Navy senior officers and engi- neers recently marked a critical mile- stone in ship research on January 6, 2000, wrapping up a successful phase in the testing of a full-scale propeller for the USS San Antonio (LPD-17) Class amphibious transport dock ship. The tests verify that a new compact design for the LPD-17 CPP meets the seven-year service life cycle require- ments. The 17 million cycles completed at the ceremony show that this new design exceeds requirements and that the service life could be extended twofold. This Naval Sea Systems Command program could lead to a significant sav- ing for the Navy in overhaul costs for the new propeller. The hub and blades, man- ufactured of nickel-aluminum-bronze and steel, constitute a unique design. The hub has a smaller diameter than in the past, leaving less surface for attaching the five blades and increasing stress in the blade root area and the hub. Verify- ing the new design will facilitate extend- ing the period between overhauls from seven to 14 years, producing lower costs, easier maintenance and faster upgrades — an affordable propeller with enhanced performance reflecting the fiscal con- straints of the modern Navy. Carderock propeller experts working with the Bird-Johnson Company, the hub designer and prop fabricator, designed the blades. Small scale prop models were then tested in another unique Carderock facility, the Large Cavitation Channel, in Memphis, Tenn. There, scaled props are mounted on ship model hulls where the flow of water over the hull and around the prop is the same as a real vessel at sea. LPD-17 propeller testing supports the shipbuilder, Avondale Industries Inc., (Continued on page 12) C-MAP The First Complete ECDIS Library "The Navigational Choice" AROUND THE GLOBE! 10 Circle 213 on Reader Service Card Maritime Reporter/Engineering News
