Navy Achieves New Propeller Milestone

Friday, January 14, 2000
The U.S. Navy has marked a critical milestone in ship research as it wrapped up a successful phase in the testing of a full-scale propeller for USS San Antonio amphibious transport dock ship. The tests verify a new compact design for the LPD-17 controllable pitch propeller meets the seven-year service life cycle requirements. The 17 million cycles completed show this new design exceeds requirements and the service life could be extended twofold. The Naval Sea Systems Command program could lead to a significant saving for the Navy in overhaul costs for the new propeller. The hub and blades, manufactured 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. Verifying the new design will facilitate extending the period between overhauls from 7 to 14 years, producing lower costs, easier maintenance and faster upgrades 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. There, scaled props were 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.
Maritime Reporter August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Navy Unmanned Aircraft Sets the Bar

The Navy's X-47B unmanned aircraft has completed its final test aboard 'USS Theodore Roosevelt' (CVN 71) and has returned to its home base at Naval Air Station Patuxent River after eight days at sea
,

Nanotechnology & Big Data: New Review

A report commissioned by the Lloyd’s Register Foundation, reviewing the potential implications of nanotechnology on the safety and performance of engineering assets

Update on the Deep Discovery at BNG

Roxi, the Central Asian oil and gas company with a focus on Kazakhstan, has given an update about the market with news of the deep discovery at its flagship BNG asset.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Navigation Offshore Oil Pipelines Port Authority Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1261 sec (8 req/sec)