Page 41: of Maritime Reporter Magazine (June 1995)

Scot Forge Produces

Record Size Rolled Ring

For New Subs

The U.S. Navy, through subcon- tractor Martin Marietta, had been trying to procure a ring destined to be part of the new, advanced-de- sign stealth propulsion system for the Seawolf class submarine. The propulsion system is super silent and reportedly undetectable by cur- rent sonar systems. The ring needed — known as a propulsor cone — was to have both inner and outer diameter profiles, and would finish at just under 200-in. O.D. and 42- in. face.

In mid-1994, Scot Forge installed a new fully automatic Wagner Ring

Mill, reportedly one of the largest and most advanced in the world.

With 450 tons of radial force (400 metric tons) and 280 tons of axial force (250 metric tons), the new ring mill, in conjunction with an in- house, 3,000-ton hydraulic open die press, had the ability to do exactly what the Navy needed. Scot Forge won the order.

The company worked closely with the material supplier, Electralloy, a G.O. Carlson Co., which poured a 67-in. (170-cm) Nickel Aluminum

Bronze (UNS C63200) ingot weigh- ing 50,000 lbs. (23,000 kg). The alloy—while rarely used in forgings of this size — was chosen for its strength, resistance to corrosion and damping capacity (ability to absorb sound).

Rolling sequences were initially simulated using Rolltech, a soft- ware created specifically for the

Scot Forge ring mill. After the ring mill was modified for the task, pro- duction took place and the result is the largest known defect-free pro- filed Nickel Aluminum Bronze ring in the world. Scot Forge, which received ISO 9002 certification in 1992, has been a leading manufac- turer of open die forgings for more than 100 years.

For more information from Scot Forge

Circle 151 on Reader Service Card

Peterson Builders Heads

Development Of New

Urban Commuter Ferry

Peterson Builders, Inc. of Wis- consin was chosen to receive fund- ing under the Advanced Research

Projects Agency (ARPA)-sponsored program of research and develop- ment in the Maritech Near-Term

Technology Applications program to develop the City Slicker high- speed urban ferry. The new ferry design will be developed in conjunc- tion with PBI's consortium part- ners Spirit Cruises of Norfolk, Va., and FBM Holdings of Cowes, Isle of

Wight, U.K.

PBI, Spirit and FBM will de- velop a new technology high-speed ferry for urban commuter applica- tion in protected and semi-protected waters. The new ferry design will have low wake wash characteristics, which will reduce wake-induced shoreline erosion on its route.

PBI is licensed by FBM to market and construct its complete line of high-speed ferries in the U.S. The new urban ferry design, City Slicker, will not only include performance improvements to support environ- mentally friendly introduction into its service routes, but will also allow

PBI to employ series production manufacturing. The series produc- tion technology and resulting pro- cess improvements will significantly improve PBI's ability to compete in both the international and domestic markets.

For more information from

Peterson Builders

Circle 152 on Reader Service Card

CALL SEACOAST FOR ALL YOUR MARINE CABLES

More Than 60 Years of Dependable Service

SHIPBOARD CABLE

U.S. Navy, Commercial Marine - l-EEE, U.L., Coast Guard

MARINE ELECTRICAL EQUIPMENT

GLAMOX Lighting

SPD TECHNOLOGIES Circuit Breakers

I. i Boxes, Switches, Transformers, Panels

ACCESSORIES

NMP ROX SYSTEM

Stuffing Tubes, Swage Tubes, Cable Hangers

FACILITY SUPPORT CABLES

Fiber, Tray, Plenum, Portable, Welding, Portable

VALUE ADDED SERVICES

Armoring, Kitting, JIT, Warehouse and Inventory Management Services

Offices in New York, Norfolk, Gulf Coast, California - Call us and let us show you the SEACOAST SERVICE "See us at SNAME Booth No. 220/222" 50 BROADWAY, HAWTHORNE, NY 10532

TELEPHONE: (914) 747-3870 » FAX: (914) 747-3919 ELECTRIC COMPANY INC.

Circle 328 on Reader Service Card

VIKING FENDER CO.

Division of

VIKING MARINE PRODUCTS, INC.

Complete Marine Fendering with

Dockside Installation Facilities

SIOE FENOENS

VIKING

Molded &

Extruded

Rubber

Foam Ship &

Pier Fender

When push comes lo shove have a Viking on your side.

VIKING

MODULAR FENDERING 340 Lehigh Avenue • Perth Amboy, NJ 08861 USA 908-826-4552 • FAX 908-826-5533 'Built on a commitment to quality, reliability and customer satisfaction.'

Service Marine

Industries, Inc.

CONSTRUCTION . REPAIRS . ENGINEERING

YOU HAVE A REPAIR

PROBLEM-WE PROVIDE

SOLUTIONS. * A leader in Gulf Coast boat and barge repairs since 1967, with three floating dry docks up to 3,000 tons lift capacity, flare boom and steel and aluminum ca- pabilities. SMI is a full service shipyard. * 24-hour repair services at highly competitive rates ensure reduced vessel down time, lower repair costs, and minimal impact to owner operations. * Conveniently located at mile marker 88.5 west of the Intracoastal Waterway.

P.O. BOX 3606 MORGAN CITY, LA 70381

TEL: (504)631-0511 FAX: (504) 631-2933

June, 1995 Circle 349 on Reader Service Card Circle 331 on Reader Service Card 43