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OTC '81 (continued from page 52) to order copies of either the 1981 Proceedings (four-volume set) and/or the Proceedings Index, contact the Offshore Technology Conference at 6200 North Cen- tral Expressway, Dallas, Texas 75206. Sets of Proceedings from pre- vious Conferences and past edi- tions of the indexes—listing sub- jects and authors for papers pre- sented at the 1969-80 Confer- ences — can be obtained at the same address. Food Service The Astrodomain provides the OTC registrant with many choices of food at one of the many snack stands, or at a sit-down meal in one of four restaurants. A Hous- ton restaurant guide will be avail- able at all registration areas in each of the three buildings. Post-Conference Education Four OTC sponsoring societies will offer continuing education Twin Disc extends marine transmission line for engines up to 3617 kW (4850 blip). 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- 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 hydrauiically-actuated clutches are the principal members of the uniquely- designed gear train resulting in a dimensionally 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. 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 NIVELUES, BELGIUM Model MGN-Z Series 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 6.0:1 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 2610-3617 (3500-4850) spending on ratio, type of duty, input speed and survey society classification require- ents. Certification certificates available from ABS, LRS and other major survey societies. Model MGN-650BZ programs on Friday and Satur- day, May 8-9. Registration and additional information on all courses may be obtained from the contact person listed for each course. These are: 1. American Society of Civil Engineers. Course title: Arctic Offshore Engineering. Contact: Patricia Irmen, manager, Contin- uing Education Services, ASCE, 345 East 47th Street, New York, N.Y. 10017. 2. American Society of Mechan- ical Engineers. Course title: Com- pliance Requirements for ANSI/ ASME Surface and Subsurface Safety Valves Used in Offshore Oil and Gas Operations Including Code Procedures, Repairs, and Remanufacturing. Contact: Joy Collier, administrator, ASME, Professional Development Pro- gram/OTC, 345 East 47th street, New York, N.Y. 10017. 3. Society of Exploration Geo- physicists. Course title: The Ap- plication of Synthetic Sonic Logs to the Development of Offshore Hydrocarbon Reservoirs. Contact: Robin Dixon, continuing educa- tion coordinator, SEG, P.O. Box 3098, Tulsa, OK 74101. 4. Institute of Electrical and Electronics Engineers. Course title: Basic Project Management —Planning, Scheduling and Con- trol. Contact: Carolyn A. Yan- koski, IEEE, 445 Hoes Lane, Pis- cataway, N.J. 08854. OTC Program Committee The Program Committee for OTC '81 consisted of: Daniel G. Godfrey, program chairman, Shell Development Co.; Arthur O. Beall Jr. (AAPG), Conoco Inc.; Gale L. Hubred (AIChE), Chevron Re- search Co.; James E. Dailey (AS- CE) , Brown & Root, Inc.; Norman A. Nelson (ASME), N.L. Rig Equipment; Glen N. Williams (IEEE), Texas A&M U.; Comdr. Don D. Wells (MTS), Naval Elec- tronics System Command; Mar- garet Welch (SEG), Exxon Pro- duction Research Co.; John W. Padan (SME), NOAA, Office of Marine Materials; James Magill (SNAME), Diamond M Co.; Car- roll D. Hudson (SPE), ARCO Oil and Gas Co., and John A. Straatmann (TMS), Climax Molybdenum Co. OTC '81 Technical Program Monday Morning 9:30 a.m. to 12:00 noon • Floating Structure Response OTC 3950 Wave Drift Force on a Floating Struc- ture in Shallow Water (continued on page 56) Write 362 on Reader Service Card POWER RANGE'kW (hp)
