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ALLISON GAS TURBINE COLOR BROCHURES AVAILABLE Three full-color well-illustrated brochures completely describing the Allison gas turbine line are available at no cost. For copies, circle the appropriate number(s) on the read- er service card in the back of this issue. 501-K—A Spectrum of Pow- er—12 pages, full-color, describes all eight models in the 501-K series. Contains photographs, full-color cut- away illustrations, performance ta- bles, specification tables and exam- ples of applications. Circle 57 on Reader Service Card 570-K and 571-K—Power for the Future—12 well-illustrated full-color pages. Complete data on these dual-shaft engines include photos, illustrations, performance graphs and specification tables. Circle 58 on Reader Service Card 501-K and 570-K—16 full-color pages. Photos, cutaway color illus- trations, mechanical drawings, per- formance graphs, specification ta- bles and material specifications. Modular design is illustrated—de- tails include reduced maintenance factors, distribution capibilities, field support, options, etc. Circle 59 on Reader Service Card • Combustor Development—The annular combustion liner was rede- signed (for the Royal Canadian De- fense Forces) to eliminate visible smoke. This improvement is now being used on all 570-K engines. • Turbine Hot Section—Blade cooling has been improved with modified air passages. Vane life has been extended through material changes and cooling techniques. • Thrust Balancing—570 engines now use a tilting pad thrust bearing system mounted aft of the power turbine that absorbs the 6,000- pounds of axial load in the power turbine. The effect of this change has more than doubled shaft bear- ing life. The 570 has been selected by the Canadian Navy for cruise power on their 5,000-ton Tribal class de- stroyer. The vessels are scheduled for updating and modernization be- ginning in 1987 when a pair of 570- KF engines will be installed in each. A major improvement was imple- mented this year when Allison in- troduced the Model 571-KF engine. This engine shares the gas generator design with the 570, but has a three- stage power turbine. It is 20 percent more powerful and 12 percent more fuel efficient. The engine has a con- tinuous standard day, no-loss rating of 7,694 shaft horsepower and can operate in excess of 8,000 shp inter- mittently. The 571 was field-tested for over 900 hours prior to shipment of the first production unit in Janu- ary 1986. Meanwhile 570-K engines have accumulated over 220,000 total hours of service time. The improve- ment mentioned above will allow that total to increase rapidly. • Free 12-Page Brochure On MARPAC Ball Valves From Mark Controls A new 12-page color brochure published by Mark Controls Corpo- ration of Skokie, 111., describes the complete MARPAC ball valve prod- uct line, one of the broadest selec- tions of automated and manual ball valves available. MARPAC ball valves are well-suited for applica- tions requiring tight shutoff, but can be used in some modulating ser- vices. For heavy slurries requiring tight shutoff, MARPAC metal seated flanged valves have been field-proven to provide very effec- tive performance and extended cy- cle life. Augmenting Mark Controls' broad line of MARPAC ball valves is a complete line of actuators and automation accessories. These prod- ucts include all types of actuator accessories capable of handling any control need. Mark Controls' stan- dard line of actuators includes the Series 80 and 89 pneumatic and the Series 20/22 electric actuators. Mark Controls Corporation man- ufactures and markets a broad line of automated and manual specialty valves and flow control products and services. For your free Mark Controls bro- chure, Circle 98 on Reader Service Card Split open a bottle of champagne. At Split. o Latest to split a bottle of champagne was the Greek Avin International Corporation, one of over 30 international organisations which have entrusted us with major shipbuilding projects. For on June 28 we launched the "Kriti Champion", the third of five vessels we are constructing for them. k And the 271 st ship we have launched,, giving us a grand production total of 4,835,641 tdw. Which is worth celebrating. / KRITI CHAMPION Tanker oil and oil products Principal dimensions: Length overall 194.5 m Length between perpendiculars 18B.0 m Breadth moulded 32.0 m Depth moulded 16.5 m •raft moulded (scantling) 114 m Deadweight on said draft 45,000 mt Characteristics of main propelling machinery: One SPLIT-M.A.N.-B& W marine diesel engine. 8262 KW(11232BHP) of standard design, type 6L BOMC, two cycle, single acting, turbocharged designed for operation on heavy fuel oil, manufactured by "Split" diesel engine factory under licence. Speed 15.0 knots. Fully automated 24-hour engine room. Comfortable single cabins for 34 crew. Come and join us and we'll split open another bottle of champagne at Split. OBRODOSPLIT * SHIPBUILDING INDUSTRY „SPLIT" Address: Put udarnika 19, P.O. BOX 107, 58000 SPLIT, Yugoslavia Telephone (exchange): 521-222. Telex: 26 125, 26 113, 26 296, BROGR YU Cable: BROSPLIT, Split. President, telephones: 522-380 522-075 A Member of the Association of Shipbuilding Industry "Jadranbrod". Zagreb, Yugoslavia. Split. The shipbuilders with a difference. Circle 234 on Reader Service Card July 15, 1986 roquip
