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20 Diesel Direct Drive in Freighter Crown City One Single Acting Engine—2700 B. H. P. Name of Engine—MclIntosh & Seymour 1927 _Builder—MclIntosh & Seymour Corp., Auburn, N. Y. ' Cycle—4; No. of Cylinders—6; B. H. P.—2700 ‘ Action—Single; Injection—Air; Scavenging—None ‘Piston Cooling—Water Cooling; Bore—32 inches Stroke—60 in; R. P. M.—95; Speed—950 f. p. m. B. H. P. per Cyl.—450; Stroke to Bore—1.875 Wkg. Str. per Rev.—3; Length O. A.—40 ft. 0 in. Height O. A.—33 ft.6in.; Width O. A.—11 ft. 6 in. Reversing—By Air; Air Comp.—3 stage, inde- pendent Vessel Name—Crown City; Owner—U.S. Shipping Board Converted to Diesel—At Fore River, Beth. S. B. Co. Type—Single screw steel, ocean cargo vessel Main Drive-——One direct connected diesel engine DESCRIPTION One engine of this size and type is direct connected to the propel- ler shaft. It is a single acting, direct reversi- ble vertical four stroke cycle crosshead type developing 2700 brake horsepower. There is an independent compres- sor unit driven by a 400 horsepower 4 cycle engine. The main en- gine is directly rever- sible by means of air. The engine is arranged with individual frames. Length B. P. P.—410 ft.; Beam Molded—-54 ft. Depth—29 ft. 9 in.; Draft—23 ft. 11% in. (sum- mer) Displacement—12,086 tons; Deadweight—-8006 tons Speed—11 knots; No. of Propellers—One Fuel Consumption—Lbs. per b. h. p. hr., 0.42 The CROWN City is one of the first twelve vessels converted from steam to diesel drive by the United States shipping board. The conversion was carried out at the Fore River plant of the Bethlehem Shipbuilding Corp. A_ successful sea trial was held on Feb. 19, 1927, shortly after which this vessel was allocated to the Roosevelt Steamship Co. for service to Australia-India. This vessel is now an economical modern freight earrier and is in a position to compete favorably with recent foreign diesel. vessels of similar type and power. Sizes of Engines Built Range from 100 to 10,000 B. H. P. MARINE REVIEW—November, 1927