Page 34: of Maritime Reporter Magazine (February 15, 1981)

Students Present Papers

At Meeting Of SNAME

New England Section

A recent meeting- of the New

England Section of The Society of Naval Architects and Marine

Engineers was held in Newton,

Mass., where two student papers were presented. The first, titled

Practical Considerations for Se- lection of High-Speed Marine

Diesel Engines, was presented by

John F. Duclos, a recent gradu- ate of the U.S. Merchant Marine

Academy and currently a gradu- ate student at the University of

Michigan. His paper dealt with the selection of high-speed ma- rine diesels. The author explained the common American methods of rating these engines in the 100-1,200 bhp range. Mr. Duclos also discussed the advantages and disadvantages of two cycles, four cycles, natural aspiration, turbo- charging, and other design op- tions and characteristics.

The second paper, titled Laser

Doppler Anemometry and the

Measurement of Loading Char- acteristics of Lifting Sections, was presented by H. Clayton

Sayre, who is a graduate student at MIT. He discussed the funda- mentals of laser doppler ane- mometry, a technique for sam- pling the flow field near a lifting surface and determining spanwise lift coefficients. He also described some experimental work carried out at the MIT propeller tunnel involving this technique. The au- thor pointed out that laser dop- pler anemometry is a method that is of great value in any qualitative investigation of the interaction of a lifting surface with the boundary layer of an adjacent perpendicular wall.

Star Iron To Build $4.7-Million Crane For

Charleston Navy Yard

Canron Corporation, Star Iron & Steel Division, Tacoma, Wash., has been awarded a $4,673,600 fixed-price contract for the pro- curement and installation of a 50- ton portal crane at the Charles- ton Naval Shipyard, Charleston,

S.C., following competition in which three bids were received.

Work will be performed at Ta- coma, Wash., and delivered and installed at the Charleston yard.

The Naval Facilities Engineering

Command, Northern Division, is the contracting activity. (N62472- 79-C-1458)

Brochure Describing

New Diesel Lube Oil

Available From Mobil

A four-page, full-color bro- chure describing the benefits of a new engine oil for high output, marine diesel engines is available from Mobil Oil Corporation. Mo- bilgard 446, designed for use in General Motors Electro-Motive

Division (EMD) engines, includ- ing those equipped with silver wrist pin bearings, also meets all

EMD, GE Class II, Alco, Fair- banks Morse, and Detroit Diesel heavy-duty requirements. It also meets the API requirements of a

CD oil for Caterpillar and Cum- mins turbocharged diesel engines.

This SAE 40 oil is also designed for these same type engines in drilling rigs and stationary power generation service.

The new oil is said to provide superior engine cleanliness and extended wear protection even with fuels having sulfur con- tents up to 1 percent. It leaves no hard-carbon deposits in ports and rings.

Pictures in the brochure show results of tests of Mobilgard 446 in EMD-645 engines covering 13,- 500 to 20,000 hours of operation.

Cylinder liners show virtually no wear, and were almost completely free from vertical scratch marks.

Ports were free of hard carbon deposits. There were no silver wrist pin problems during the test. Approximately 70 percent of the original lead flashing re- mained on the bearing surfaces.

There was no feathering of bear- ing material into oil grooves, and oil grooves were free of deposits.

For a free copy of the brochure,

Write 88 on Reader Service Card

AN! is the answer.

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Call an Anixter cable specialist today—consult the Yellow Pages for the Anixter stocking location in your area.

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Write 115 on Reader Service Card 36 Maritime Reporter/Engineering News