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SAINTE GENEVIEVE—Dredge—Rivers—Sternwheel—Steam Name—SaAINTE GENEVIEVE Owner—United States Engineers Builder—The Dravo Contracting Co. Naval Architect—C. H. Giroux Launched—oOct. 1, ’32; comp., Nov. 23, °32 Sister Ship—Grarron. Launched, Oct. 22, 1932; completed, Dec. 24, 1932. Classification—Owner’s requirements HULL PARTICULARS Length over all, 265 feet, 2 inches (over cut- ter head); length between perpendiculars, 200 feet; breadth molded, 47 feet 10 inches; depth molded, 8 feet; draft, 4 feet 9 inches; displace- ment loaded, 1250 tons; gross tonnage, 947; net tonnage, 701; bunker fuel oil capacity in tons, 90; speed, 11 statute miles per hour. MACHINERY PARTICULARS Main Engines—Two, horizontal, tandem com- pound, condensing, reciprocating steam _ en- gines; cylinders, 16, 32 inches in diameter by 84 inches stroke. At a speed of 19 r. p. m., these two engines develop a total of 900 horse- power; at 20 r. p. m., they develop about 1000 horsepower. They operate on steam at 300 pounds pressure, 100 degrees Fahr. superheat and 20 inches vacuum. Each engine is connect- ed through pitmans of steel tube type with a sternwheel, 20 feet in diameter, 27 feet long, having 14 arms with 30 inch buckets. Engines and paddle wheels for both the Saint Genevieve and the Grafton were designed and built by the Nordberg Mfg. Co. Boilers—Two, Babcock & Wilcox, watertube marine boilers with a total heating surface of 6520 square feet and 374 square feet of super- heating surface. Working pressure, 305 H My att tt a a |e apy am a DESCRIPTION This dredge and sis- ter vessel, GRAFTON, are 20-inch self-propelled pipe line dredges, with horizontal tandem com- pound steam _ recipro- cating engines for pro- pulsion and _ powerful electric motor driven cutter and dredge pump. Motors receive current from two gen- erators driven by one main steam turbine. pounds; superheat, 100 degrees Fahr.; fuel, oil. Superheaters, desuperheaters, and oil burning equipment supplied by the Babcock & Wilcox Co. Soot blowers, Diamond Power Specialty. Generators—For supplying current for elec- tric motor driven dredge pump and cutter. De Laval steam turbine and reduction gear driving one 1000-kilowatt and one 200-kilowatt, both 250 volts, direct current, Westinghouse gen- erators on the same shaft. Dredge Pump Motor—One Westinghouse, 1200 h. p., at 250 volts; 200 to 250 rT. p. m. Also, one 225 h. p., Westinghouse motor, at 350 to 450 r. p. m. for driving cutter. Auxiliary Generators—Two, DeLaval turbine driven, Westinghouse generators each 75 k.w., 120 volts, direct current. Both main and auxil- iary generator sets operate on steam at 300 pounds pressure, 100 degrees Fahr. superheat and 26 inches vacuum. Also, one 15 k.w. De Laval turbine driven Westinghouse generator. AUXILIARY EQUIPMENT Pumps—Worthington Pump & Mach. Corp. Windlass, Winches—Lidgerwood Mfg. Co. Steering Gear—Dravo Contracting Co. Refrigeration—Baker Ice Machine Valves and Fittings—Crane Co. Marine Hardware—The Dayton Mfg. Co. Evaporators—Griscom-Russell Co. Feed Water Heaters—Griscom-Russell Co. Feed Water Filters—Griscom-Russell Co. Galley Equipment—Elisha Webb & Son Co. Electric Motors—Westinghouse Controls, Switchboard—wWestinghouse Fans (Staterooms )—Westinghouse Oil Purifier—Goulds Pumps Ine. 1189) th LE = WEI =a iN Sst MARINE REVIEw—April, 1933