Page 9: of Maritime Reporter Magazine (February 15, 1974)

McAllister Orders Three 4,290-Hp Tugs

Elevating pilothouses is feature of three new 4,290-hp McAllister tugs being built by

Main Iron Works, Houma, La., as seen in artist's rendering in both extended and sea- going positions. Giving height-of-eye of 45 feet when elevated, the house will offer greater visibility when tug is handling new superbarges in and around harbors.

McAllister Brothers, Inc., 17 Bat- tery Place, New York, N.Y., has placed an order with Main Iron

Works, Inc. of Houma, La., for the construction of three 4,290-hp tug- boats at a cost of $4 million. James

P. McAllister, president, in an- nouncing the contract award, said: "The addition of these new tugs to our fleet of 50 vessels is in direct response to the ever-increasing re- quirements for more power in all aspects of marine transport on the

East Coast of the U.S., which we see as continuing in its importance as the location of major world ports."

Among the most powerful and maneuverable docking tugs ever to operate in New York Harbor, the three new additions to the McAllis- ter fleet achieve their power through twin diesel engines with Kort nozzles, which develop a thrust of 140,000 pounds of bollard pull. Ma- neuverability is gained through the combination of twin screws, the

Kort nozzles, and two main rud- ders aft, and four flanking rudders forward of the nozzles. "The principle of a fixed Kort nozzle operating in conjunction with two flanking and one main rudder results in the optimum steering system for a docking tug, according to naval architectural opinion voiced at the First North

American Tugboat Conference in

Vancouver, B.C.," Mr. McAllister pointed out.

This unique steering and propul- sion system was originated in Eu- rope with the development of the nozzle by Dr. Ludwig Kort. First use in the United States was on

Mississippi River towboats. Mc-

Allister's newer tugs have utilized this unique application since 1961, and the company will have 10 of its fleet so equipped with the delivery of the new 4,290-hp vessels.

The tugs, which will be used in

New York Harbor and coastal work, join the 109-year-old towing company's fleet, which also oper- ates in Philadelphia, Norfolk, Puer- to Rico, the Great Lakes, and St.

Lawrence waters.

The new tugs are 111 feet 6 inches long, with a beam of 30 feet and a draft at midships of 14 feet 9 inches, and are fully automated.

The elevating pilothouses give a height-of-eye of 45 feet for greater visibility when handling the new superbarges.

A new application of hydraulic pumps and motors is being designed by McAllister for installation on the towing winches. The system will enable the tug to vary the speed of her winches without re- ducing their torque, for more effi- cient handling of tows.

Main propulsion is provided by twin General Motors EMD 16-645-

E-2 diesels with Falk reduction gears and Airflex clutches.

Alternating current is furnished by two GM Model 671 Delco 94-

KVA generators. Hydraulic steer- ing systems have 'been built by

Steering Systems, Inc. of New Or- leans, La.

Lawrence Mazerac Jr. is presi- dent of the 26-year-old Main Iron

Works, one of the major builders of tugboats in the United States.

American Trading Files

CDS To Build Four 89,000-Dwt Tankers

A construction differential subsidy request has been filed with the Mari- time Administration to assist in the construction of four 89,000-dwt tank- ers by the American Trading Trans- portation Co., Inc., 555 Fifth Avenue,

New York, N.Y. No specific ship- yard has been selected. The approxi- mate cost of these vessels will be $34 million each.

A.C. Hoyle Co.

Appoints Aries Marine

A.C. Hoyle Company, Iron Moun- tain, Mich., manufacturers of ma- rine deck equipment, has announced the appointment of Aries Marine &

Industrial Sales Corporation, 4000

Haring Road, Metairie, La. 70002, as their Gulf Coast sales representa- tive for Louisiana and Mississippi.

George A. Christensen, president, has been active in the Gulf area ma- rine field for 33 years. He has been a manufacturers' representative since 1966 and prior to that, was area sales manager of marine sales for the Mobil Oil Company. He is a member and past president of

The Propeller Club-Port of New

Orleans, member and past com- mander of American Legion Mari- time Post 247, and an associate member of The Society of Naval

Architects and Marine Engineers.

The winter meeting of the Great

Lakes and Great Rivers Section of

The Society of 'Naval Architects and Marine Engineers was held on

January 17, 1974, at the Aqua-

Marine Lodge on Avon Lake, Ohio.

The morning business and techni- cal sessions were attended by 125 members and guests.

Following lunch and a showing of the film "Song of Chicago," pro- moting the Section's hosting of the

National Spring Meeting of the

Society at the Palmer House in

Chicago, -111., May 22-24, 1974, the group toured the Lorain, Ohio, yard of the American Ship Build- ing Company.

Dravo Appoints

William R. Cumming III

Marine Sales Manager

William R. Cumming III

William R. Cumming III has been appointed manager of marine sales for Dravo Corporation, Pitts- burgh, Pa.

Mr. Cumming joined Dravo in 1966 as manager of southern ma- rine sales. His previous employ- ment included Lane Wells Co.,

New Orleans Public Service, and

W.H. Curtin and Co., all Louisiana- based firms.

He is a graduate of Louisiana

State University with a B.S. degree in petroleum engineering.

Mr. Cumming is a member of the

American Institute of Chemical

Engineers, International House,

The Propeller 'Club, and the Plim- soll Club.

Dravo Corporation builds a vari- ety of marine equipment, including towboats, Ibarges and tugboats.

There were three papers present- ed during the technical session: "Standard Great Lakes Self-Un- loader-River Service Type," by O.

R. Archer, Frank Giaquinto, and L.

A. Dommin; "The Need for Mul- tiple Barge Towing 'Capability on the Great Lakes," lay A.J. Chomis- tek, and "Sixty-Four-Foot Side

Wheel Excursion Boat for Lake

Michigan," by Peter M. Swift and

Bruce C. Nehrling.

The next Section meeting will be the National Spring Meeting at the

Palmer House in Chicago, May 22- 24, 1974. A ibusy and excellent pro- gram has been planned and attend- ance is expected to 'be large.

SNAME Great Lakes/Rivers Section Hears

Three Technical Papers At Winter Meeting

Pictured above during the meeting at the Aqua-Marine Lodge on Avon Lake, Ohio, left to right: Frank Giaquinto, Ossie Archer, L.A. Dommin, Arthur Chomistek, Bruce

Nehrling, authors; Trevor White, Section chairman, and Peter M. Swift, author.

February 15, 1974 11