View non-flash version
SNAME San Diego Section Hears Paper On Sheathing Hulls With Copper-Nickel The San Diego Section of The Society of Naval Architects and Marine Engineers gathered re- cently at the Harbor House to hear a paper by D.W. Czimmek and L.W. Sandor titled, "Eco- nomic and Technical Feasibility of Copper-Nickel Sheathing of Ship Hulls." Mr. Czimmek is a research project engineer at Newport News Shipbuilding and Dry Dock Com- pany in Virginia; Dr. Sandor is manager of materials technology at the Franklin Research Center in Philadelphia. Both authors are members of the SNAME Technical and Research Panel HS-9. In 1979, this panel became interested in copper-nickel sheathing as a bio- fouling protection of ship hulls. Mr. Czimmek investigated the economic feasibility of copper-nickel sheathing for two ship types on a life-evcle basis. The ship types chosen were an 18,000-dwt RO RO vessel and a 280,000-dwt tanker. Three different antifouling sys- tems were traded off in his stud- ies—conventional antifouling paint, Viton-TM DuPoril TO CONNECT TUBING TO SAE/MS STRAIGHT THREAD PORTS, USE: ~<} ftr~i iHi fin U mUUJ Male SAE/MS Connector al S ffit m* long Male SAE/MS Connector Male SAE/MS Branch Tee Positiondble Male SAE/MS Run Tee Positionable TO CONNECT TWO TUBES OR TWO TUBE FITTINGS TOGETHER. USE: SWAGELOK to Male AN Union IW^^Rfn r^^ i.... 1 ffrffl Ttr— " MM' x SWAGELOt to Male AN Bulk head Union SWAGELOK to Female AN Adapter TO REDUCE A SAE/MS PORT, USE: •H ifljj^ TO PLUG A SAE/MS PORT, USE: Hollow He. Plug m/uf jUll^^ He. Head Plug TO ADAPT SAE/MS TO NPT OR AN USE: IwtfjMlL SAE/MS to Male NPT SAE/MS to Female NPT Mlk ill - SAE/MS to Male AN Zero Clearance Fema.e Connector Zero clearance SWAGELOK Connector ZERO CLEARANCE ASSEMBLIES ^W & —^pj Zero Clearance Male Connector Sequential assembly is not required The Zero Clearance concept provides easy accessibility to system compo nents and reduces installation and labor costs tttttt^ U I Zero Clearance Straight Thread Connector mint, f mrijr^! muy| ! OTry^Hg*'' VCO SWAGELOK Connector Mill 1 ^HW 1; .mil.I mu ••h VCO SWAGELOK Bulk head Connector VCO Ma e E bow •WW- ifflr^n"" VCO Male Straight Thread Connector i|L P VCO Male Straight Thread \ _M Elbow/Positionable VCO SWAGELOK J£ Elbow 4 utmir-uumn VCO Male Connector VCO Female Connector m 1984 Markad Service Co . all rights reserved P-05-02 SWAGELOK -TM Crawford Fitting Company VCO TM Caion Company Stocked for immediate delivery by your Authorized Sales & Service , _ Representative CRAWFORD FITTING COMPANY/CAJON COMPANY Circle 301 on Reader Service Card When you go to sea, you need a lifeline you can always trust. Under all circumstances. With no exceptions. That's why the Harris RF-230M HF-SSB syn- thesized transceiver belongs on your boat. It's built to the same exacting standards of quality and con- venience that have made its military counterpart standard equipment for combat use. And its repu- tation for reliability is backed up by sales: more than 5,000 units sold worldwide for land and mari- time use. The quality starts with power: a full 125 watts, available through as many as 96 preset channels. Banded automatic servo tuning directs the output through the antenna coupler, and constantly adjusts to changing condi- tions. Whether you're one mile or one thousand miles from shore, you're never out of touch. II ARRI^ Electronically Alterable Read Only Memory HP H JaBCKIg (EAROM) allows the RF-230M to be programmed B B B •• •• W internally, on the spot—with no crystals to change! You'll find convenience designed into every fea- ture of the RF-230M. Compact modular construc- tion and completely solid-state design conserve your valuable cabin space. Simple, easy-to-read controls—with features like thumb wheel fre- quency selection, dimmer controls and back- lighted indicators—make operation easy. Find out more about the RF-230M and its ibiiAU full line of accessories. Write or call us: COMMUNICATION RF-230M. ] BECAUSE RELIABLE •IS NOT! A LUXURY. HARRIS CORPORATION, RF Commu- nications Group, 1680 University Avenue, Rochester. New York 14610 U.S.A., Tel: 716-244-5830. Telex: 978-464. See us at AFCEA, June 19-21, Booth A240. self-polishing copolymer (SPC), and copper-nickel sheathing. Dr. Sandor addressed the tech- nical feasibility of copper-nickel sheathing. Four methods of at- tachment were discussed. Test re- sults were presented of the in-ser- vice performance over a period of two years for four groups of sheathing panels attached by the various methods to the 90,000-dwt tanker Arco Texas. New, cost-ef- fective welding techniques for cop- per-nickel sheathing were also introduced. The results of the analysis indi- cate that there is an economic ad- vantage to ship operators by sheathing their vessels with cop- per-nickel. Some of these advan- tages are: low hull surface friction for the ship's life, resulting in fuel savings, reduced maintenance cost, and reduced drydocking time. En- vironmental problems due to toxic waste associated with the removal of conventional antifouling paint and SPC during recoating of ship hulls are eliminated as well. Marine Safe Electronics Offers Free Literature On 'Fail-Safe' Line Interesting literature that dis- cusses the minimizing of overall operational costs in the shipping industry by judicious expenditure on maintenance is available with- out charge from Marine Safe Elec- tronics, Concord, Ontario. Titled "Preventive Maintenance of Electric Machines Assures Lower Operating Costs," and written by Arie Lapsker, vice president of engineering, Marine Safe Elec- tronics, the nine-page discussion concludes that a policy of cost re- duction by avoiding unnecessary and expensive electrical machine re-winds should be an indispensa- ble component in achieving profit- able operation of vessels in today's highly competitive business environment. The author points out that the most serious insulation break- downs occur during the starting period and until a few years ago an effective warning device that could monitor a machine while it is idle was not available commer- cially, but that a comprehensive range of insulation-monitoring re- lays for marine motors and gener- ators is now offered by Marine Safe Electronics of Canada Ltd. under the name of "Fail-Safe"". For a free copy of the "Fail-Safe" literature. Circle 91 on Reader Service Card Circle 316 on Reader Service Card
