McAllister Orders Three 4,290-Hp Tugs
McAllister Brothers, Inc., 17 Battery 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 tugboats at a cost of $4 million. James P. McAllister, president, in announcing the contract award, said: "The addition of these new tugs to our fleet of 50 vessels is in direct response to the ever-increasing requirements 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 McAllister fleet achieve their power through twin diesel engines with Kort nozzles, which develop a thrust of 140,000 pounds of bollard pull. Maneuverability is gained through the combination of twin screws, the Kort nozzles, and two main rudders 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 propulsion system was originated in Europe 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 operates in Philadelphia, Norfolk, Puerto Rico, the Great Lakes, and St.
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 reducing their torque, for more efficient 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 steering systems have 'been built by Steering Systems, Inc. of New Orleans, La.
Lawrence Mazerac Jr. is president of the 26-year-old Main Iron Works, one of the major builders of tugboats in the United States.
Other stories from February 15, 1974 issue
- NASSCO Launches Largest Vessel Ever Built On West Coast page: 7
- Walter Thorsen, Inc. Named Exclusive Rep For Eleusis Shipyards page: 8
- Oceans International Announces Merger And Expansion Plans page: 10
- McAllister Orders Three 4,290-Hp Tugs page: 11
- Bethlehem Begins Construction On 265,000-Dwt Tanker —Largest Vessel Built In The United States page: 12
- Arthur Levy Boat Service Announces New Appointments For Thomas And LeBlanc page: 12
- Todd President Sees U.S. Shipbuilders Improving Competitive Position page: 14
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- K.W. Waldorf Named To New Zapata Post page: 15
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- USMMA At Kings Point To Admit Women page: 19
- Storm Awards Contract To Bethlehem Beaumont Shipyard For Offshore Drilling Rig page: 20
- NASSCO Expanding Facilities To Build 150,000-Ton Tankers page: 20
- SNAME N.Y. Metropolitan Section Hears Technical Paper On 'New Approach To The Ship Hull Characteristics Problem' page: 21
- ASNE Annual Meeting Set For May 2-3 In Washington, D.C. page: 21
- Thomas B. Crowley Elected President At Western Shipbuilding Ass'n Annual Meeting page: 24
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- Friede & Goldman Inc. Design Zapata Rigs Building At Avondale page: 28
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- Ametco Shipping Elects J.E. Hundt President page: 29
- World Dredging Ass'n New Midwest Chapter To Meet February 28 page: 29
- L. Arthur Strenkert Named Sales Manager Smit Nymegen Corp. page: 31
- Magnavox Announces Offshore Drill Rig Positioning System page: 31
- Paper On Water jet Propulsion Discussed During SNAME Philadelphia Section Meeting page: 32
- Worthington Service Corp. Names Budrick And lennings page: 33
- Zapata Corporation Reports Record Results page: 33
- Drew Chemical Names Rogers Managing Director New So. Africa Subsidiary page: 33
- Luckenbach To Build New Tampa Terminal page: 33
- SNAME Players Perform At Pacific Northwest Section's 27th Annual Fall Meeting page: 33
- David O'Neil To Head New Firm Of Marine Propulsion Consultants page: 34
- Liberian Services —Consulting Firm Elects Wiswall Pres. page: 35
- Diamond M Orders Two Jackup Rigs And A Semisubmersible page: 35
- Management Changes At Dearborn-Storm page: 36
- Tanker Management Firm Promotes Nichols page: 36
- Raytheon Company Submarine Signal Div. Appoints R.G. Popovici page: 38
- Berwind Lines Names Bericochea Exec. VP page: 38