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Ice Tech '81 (continued from page 43) decided to build a polar research vessel. The hull form of this re- search vessel has been designed by the Hamburg Ship Model Ba- sin. The most important achieve- ment was the development of ship lines which prevent the ingestion of ice into the propellers. This pa- per covers ice technological as- pects of the ship and reports on model test results. Paper No. 19 — "Division of Icebreaker Ice Resistance into Components" by I.I. Poznvak and B.P. Ionov. SYNOPSIS—For the development of a concept design of an ice- breaker it is necessary to have a scientific, soundly based method of estimating ice resistance and of dividing the total ice resist- ance into components. This paper deals with the results of theoret- ical and experimental studies con- cerning the division of the ice resistance into its components and a proposed method for their estimation. Paper No. 20 — "An Experi- mental Study of Hull Forms for the New Japanese Antarctic Ob- servation Ship" by S. Narita and M. Yamaguchi. SYNOPSIS: The Japanese Gov- ernment is building the nation's A ASMAR Meet Kevin Murphy - assistant sales manager and a man who gets things done. He can recommend the right product to do the job. A good follow-up man who goes into the field to see first-hand the applica- tions of marine products. Hayward Marine Products include . . . • PRESSURE-VACUUM RELIEF VALVES • VENT CHECK VALVES • BASKET STRAINERS • VALVE OPERATING STANDS • DECK COVER • SUCTION BELLMOUTHS • ANGLE CARGO VALVES • DECK DRAINS • ULLAGE COVERS • DECK ACCESS BOXES • DECK PLUGS and other valves and fittings. Fill out the coupon below and we will send our new brochure to you. w -----n j HAYWARD DIVISION OF HAYWARD MANUFACTURING COMPANY. INC. 900 Fairmount Avenue, Elizabeth, New Jersey 07207 Phone: (201) 351-5400 / Telex: 139414 SEND BROCHURE ON MARINE STRAINERS, VAL VES & FITTINGS. NAME TITLE COMPANY ADDRESS CITY STATE/ZIP SERVING THE MARINE INDUSTRY WITH DEPENDABLE PHODUCTS SINCE 1927 QQ Write 206 on Reader Service Card AGENTS U.S.A. New York Jackson Marine Corp. Robert Catharine Tel.: (212) 269-0937 TLX: (ITT) 423175 (WU) 640164 GERMANY • Hamburg Peter Gast Shipping GmDH Tel (040) 337141 TLX:215588 UNITED KINGDOM London Shiprepairers and Shipbuilders Ltd. Tel: 01 9285265 TLX:918828 FRANCIA Colombes J P. Naval Tel 7805021 TLX:611541 F NORWAY Oslo Ebbe C. Astrup A/S Tel. (02) 562580 TLX: 11612 GRECIA Pireaus S. S. R. S. Ltd. Tel.: 4133902 TLX:212282 212735 HONG KONG Shiprepairers and Shipbuilders Ltd Tel : 3-649646 TLX: 38407 Srsic H X Write 119 on Reader Service Card SHIPBUILDING AND DOCKING CO. Head Office: PRAT 856, Piso 14, Valparaiso, Chile. Telephones: 57129-59411 — Telex: 30305 Asmar CL PRIVILEGED POSITION IN SOUTHERN HEMISPHERE, SOUTH AMERICA, VALPARSISO YARD Telephones: 51550 59427 Telex: 30527 Asmar CL TALCAHUANO YARD Telephones: 41628 42656 Telex: 60085 Asmar CL MAGALLANES YARD (Punta Arenas Port) Telephones: 24762 24434 Telex: 80038 Asmar CL LARGEST SHIPREPAIRING AND SHIPBUILDING FACILITIES ON THE SOUTH PACIFIC COAST. • Docking Vessels up to 80,000 DWT • New Building up to 70,000 DWT • Off-Shore Constructions, Jack-up Rigs, Barges, Platforms • Any Kind of Hull and Engine Repairs • Voyage Repairs • Electronic and Electrical Services • Flying Squad Service AUTHORIZED SERVICE • Sulzer • Krupp Atlas • Mitsubishi • Siemens • Burnmeister & Wain • Ayrodev International • Raytheon (License) • Sperry • Hatlapa second Antarctic observation ship. The new vessel is to be a 30,000- shp, triple-screw polar icebreaker and will be twice as powerful as her predecessor. This paper de- scribes the results of the experi- mental study of hull forms for both icebreaking capability, con- ducted at HSVA, and open-water propulsive performance, conduct- ed at the NKK Tsu Ship Model Basin. Paper No. 21—"Icebreaker Bow Forms—A Parametric Variation" by P. Noble and V. Bulat. SYNOPSIS: Using the lines of Canada's most recent class of ice- breaker, the "R" Class, as a start- ing point, a model test program was undertaken to investigate possible improvements in level ice resistance and ridge penetration capability which might result from changes in the forebody shape of the vessel. A parent hull model and three variants were tested in the Artec Canada ice towing basin. This paper describes the developments of the various hull forms, the test program and the results of the analysis of the model test data. Paper No. 22 — "Study of Ship Ice Performance in Narrow Chan- nels" by V.I. Kashtelyan and L.G. Tsoy. SYNOPSIS: The growth of the di- mensions of ice class ships is in- hibited by the dimensions of ice- breakers employed in convoys. The width of a channel controlled by the breadth of the icebreaker has proved one of the most im- portant factors affecting ship speed in the icebreaker channel. This study is an assessment of the effects of relative channel width on ship speed in an ice- breaker channel. Some full-scale results and the results of model tests in the Arctic and Antarctic Institute, Leningrad, are given. Paper No. 23—"Results of Full- Scale Trials in Ice of CCGS Pierre Radisson" by R.Y. Edwards, B. Johnson, M. Dunne, G. Comfort and V. Bulat. SYNOPSIS: In July, 1978, the Canadian Coast Guard accepted delivery of the first of the "R- Class" icebreakers, the CCGS Pierre Radisson. The ship was extensively instrumented prior to her maiden voyage which was to take her from Victoria, B.C., through the Northwest Passage to her new home port of Quebec. Full-scale data gathered in thick first-year and multi-year ice in the Arctic and subsequently dur- ing winter operations provided performance information for a wide range of ice types, thickness and strength. This data is pre- sented together with 1/36-scale model experiment results. Paper No. 24—"Performance of CCGS Franklin in Lake Melville 1980" by M. Michailidis and D.C. Murdey. SYNOPSIS: This paper presents ice performance data of CCGS Franklin as obtained from trials during two probes into Lake Mel- (continued on page 46) Write 202 on Reader Service Card
