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TOWBOAT 'BOONE7 Boone Dravo SteelShip Corporation, Pine Bluff, Ark., recently deliv- ered the towboat Boone to Cin- cinnati Gas and Electric Compa- ny for use at its East Bend Sta- tion, a coal and lime facility lo- cated on the Ohio River near Rabbit Hash, Ky. The Boone has a length of 60 feet, beam of 22 feet, and depth of 7.5 feet, and is powered by twin Caterpillar 3412 marine die- sels developing a total of 900 bhp at 1,800 rpm. The engines are cooled by Fernstrum grid coolers. Caterpillar 3816, 45-kw, electric- start generators sets power the electrical system, which includes Beebe 33-RC deck winches, Car- lisle & Finch searchlights, and other equipment. The vessel is equipped with two 62-inch by 34-inch, four-blade bronze propellers furnished by Michigan Wheel. Two steering and four flanking rudders provide for maneuverability and speed. The heavily braced and framed hull is fabricated of %-inch plate; deck plating is ^4-inch. Fuel ca- pacity is 8,000 gallons. SUPPLY BOAT 'CLIPPER KEY WEST' Blount Marine Corporation of Warren, R.I. has delivered the 156-foot offshore supply vessel Clipper Key West to Hamilton, Inc. of Panama City, Fla. The vessel admeasures under 200 gross tons, and is equipped to carry up to 600 long tons of com- bined calcium chloride or liquid mud and deck cargo. Clear deck length inboard is 114 feet, with a clear inboard width of 30 feet 8 inches. Her four mud tanks have a total capacity of 1,800 cubic feet. Main propulsion is provided by two General Motors Detroit Die- sel Allison 16V149 diesels devel- oping a total of 1,800 bhp at 1,800 rpm and driving Columbian Bronze stainless steel propellers. Two 99-kw generators furnish electric power. A 36-inch Murray and Tregurtha bow thruster is powered by a 210-bhp diesel. On sea trials at full draft the vessel attained a speed of 12 knots. Steering is S.S.I, electrohy- draulic with an automatic pilot. Two radars, Sitex 22 and 23, a Marconi CH100 SSB radio, Mo- torola Triton VHF radio, Ray- theon 6000 Dual C Loran, and Write 362 on Reader Service Card • Data Marine depth recorders com- plete the pilothouse equipment. The Clipper Key West meets U.S. Coast Guard requirements for Gulf Service, and is classed + A-1 by the American Bureau of Shipping. She joins the supply vessels Clipper Paradise Island and Clipper Cozumel built by Blount Marine Marine for the same owner. (continued on page 16) Clipper Key West Twin Disc extends marine transmission line for engines up to 3617 kW (4850 bhp). Now Twin Disc offers the North American marine industry five new series of marine reverse and re- duction transmissions for higher horsepower diesel engines. Twin Disc has extended its line of do- mestically manufactured trans- missions to include higher horse- power models from its partially- owned affiliate Niigata Converter Company Limited (NICO). This means the superior reliability, performance and operating eco- nomics typical of Twin Disc Marine Transmissions are now available here in greater horsepower capacities than ever. These larger, coaxial (inline) marine transmissions are desig- nated Models MGN-650BZ, MGN- 1000AZ, MGN-1600AZ, MGN-2200AZ and MGN-3200AZ. In addition, special designs and other NICO models are available in produc- tion quantities to meet specific in- stallation and application re- quirements. The MGN-Z Series Features: • Coaxial input-output shaft ar- rangement for lowered propul- Model MGN-Z Series sion package center of gravity. • Wide variety of models and ratios to meet various propulsion requirements. • Use same type oil as specified for the engine. • Carburized, hardened and pre- cision finished single helical gearing, anti-friction bearings, and hydraulically-actuated clutches are the principal members of the uniquely- designed gear train resulting in a dimenslonally compact, low weight, high efficiency transmis- sion. • Prompt, smooth shifting, integral hydraulic forward and reverse clutches respond to operator requirements for good vessel maneuverability. The "X" control is available as an option which permits variable propeller speed independent of engine speed. • Housing design and strategic placement of access covers provides for easy inspection and maintenance, even in compact engine rooms. MARINE TRANSMISSION MODEL MGN-650BZ MGN-1000AZ MGN-1600AZ MGN-2200Z MGN-3200Z NOMINAL RATIOS 3.0:1 3.5:1 4.0:1 5.0:1 6.0:1 3.0:1 4.0:1 5.0:1 60:1 7.0:1 8.0:1 9.0:1 3.0:1 4.0:1 5.0:1 3.0:1 3.5:1 4.0:1 4.5:1 5.0:1 3.0:1 4.0:1 5.0:1 GOVERNED ENGINE SPEED RANGE*, RPM 700-1800 700-1800 700-1700 700-1600 700-1400 The MGN-Z Series, like all Twin Disc Marine Transmissions, are backed by Twin Disc's warranty program with Approved Renewal Parts available from Twin Disc. For more information on the new coaxial MGN-Z Series contact Twin Disc, In- corporated, Racine, Wl 53403, U.S.A. Telephone (414) 634-1981, Telex 264432. Request Bulletin 900. We put horsepower to work:* RACINE, WISCONSIN 53403, U.S.A. ENGLAND BRAZIL SOUTH AFRICA SINGAPORE AUSTRALIA HONG KONG TWIN DISC INTERNATIONAL S.A. 1400 NIVELLES, BELGIUM •Depending on ratio, type of duty, input speed and survey society classification require- ments. Certification certificates available from ABS, LRS and other major survey societies. Model MGN-650BZ POWER RANGE* kW (hp) 634-895 (850-1200) 634-1119 (850-1500) 1119-1641 (1500-2200) 1491-2237 (2000-3000) 2610-3617 (3500-4850)
