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14 MARINE REVIEW November, 1926 ELE Diesel Direct Drive in U.S. S. B. Freighter One Double Acting Engine—3300 B. H. P. DESCRIPTION terse 10 Name of Engine—Hamilton M. A. N.; Year—1926 Builder—The Hooven, Owens, Rentschler Co. Cycle—Two; No. of Cylinders—4; I. H. P.—4200 Injection—Air; Scavenging—Attached pumps Piston Cooling—Fresh water; Bore—27% in. Stroke—47%4 in.; R. P. M.—95 Piston Speed—748 ft. p. m.; Press. Ind.—65 Pressure Brake—84; I. H. P. per Cyl.—1050 B. H. P. per Cyl.—825; Mechanical Eff.—78.5 Stroke to Bore—1.73; Working Stroke per Rev.—8 Lgth. O. A.—41 ft. 0 in.; Width O. A.—14 ft. 6 in. Height—From center of crankshaft, 26 ft. 6 in. Weight—one engine, 725,000 lbs.; one engine, 220 ibs; per B.-H. Psand-173 ibs. per I. H. P. Reversing—By air, sliding cam shaft. Air Compressor—Three stage vertical, attached. Vessel Name—Oscar Daniels Shipping Board Hull. Main Drive—Direct Diesel; L. B. P. 402 ft. Beam—54 ft.; Depth—323 ft. 9 in. Draft—26 ft. 10% in.; Displacement—12,910 tons Deadweight—9500 tons; Speed—11% knots No. of Propellers—One One engine of this size and type direct- connected to the pro- peller shaft is to be installed in a 9500-ton Oscar Daniels hull as a unit in the shipping board’s diesel program. This powerful engine is one of four working on the double acting principle developed by three American build- ers as a result of the conversion from steam to diesel initiated by the government. Remarks This engine is of the vertical marine type with built up crankshaft, marine style connecting rod and single crosshead guide. The framing consists of a lower housing supported on the bedplate with entablature setting on the housing, and above, upper columns connecting to the upper entablature. Supported by the upper and lower entablatures, the cylinders are set between the upper columns, allowing entire freedom of ex- pansion and making a solid structure for absorb- ing the combustion pressure and load, which is taken up by through tie bolts keyed from the bottom of the bedplate to the upper part of the upper entablature. The compressor of the vertical three-stage type with necessary intercoolers is located in the center of the engine. Operating gear placed at the middle of the engine, on the lower grating, controls the operation of the entire engine. Driven through gearing from the main crank- shaft at the center of the engine, the camshaft is located on the lower entablature. Fuel pumps are driven from the cam shaft. One of the Oscar Daniels hulls of the United States shipping board before conversion