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Twin Diesel Direct Drive in Tanker Hull 107 Two Engines—Each 2100 B. H. P. a ale Efe oH? = ae : Engine Name of Engine—Sun-Doxford; Year—1927 Builder—Sun Shipbuilding & Dry Dock Co. Cycle—2; No. of Cylinders—4; I. H. P.—2390 B. H. P.—2100; Action—Single; Injection—Solid Scavenging—Attach.; Piston Coolg—Fresh water Bore—21.26 in.; Stroke—85 in.; R. P. M.—82 Piston Speed—583 ft. p. m.; Press. Ind.—95.6 Pressure Brake—84.2; B. H. P. per Cyl.—525 I. H. P. per Cyl.—597; Mechanical Eff.—88&% Stroke to Bore—4; Wkg. Strokes per Rev.—4 Length O. A.—52 ft. (over thrust shaft flange) Height—29 ft. 8 in.; Width O. A.—11 ft. 10 in. Weight—One engine, 580,000 lbs.; All machinery, 1100 tons; Lbs. per B. H. P. one engine, 276; Lbs. per B. H. P. all machinery, 586 Reversing—Yes; Air Comp.—Two of 150 ec. f. m. Vessel Name—Hull 107; Builder—Sun S. B. & D. D. Co. Type—Twin screw ocean going oil tanker Main Drive—Two diesel engines direct connected Length O. A.—530 ft.; Lgth. B. P. P.—510 ft. DESCRIPTION Two engines of this size and type direct connected to separate propeller shaft are to be installed in a 16,850 deadweight ton tanker now building. The en- gines are of 4-cylinder, 2-cycle, solid injection, Sun-Doxford opposed piston type, operating under low compression (285 lbs.) pump main crankshaft and is located between the third and fourth cyl- inders. Beam—70 ft.; Depth—40 ft.; Draft—29 ft. 6 in. Disp].—24,000 tons; Deadweight—16,850 tons Speed—11% knots; No. of Screws—2 Fuel Capacity—10,500 bbls., 1500 tons Fuel Consumption—Lbs. per b. h. p. per hr., all purposes—0.45; Lbs. per i. h. p. per hr., all pur- poses—0.392; Tons per day—20.3; Sailing ra- dius—20,000 miles Generators—Two of 120 k. w. each at 325 r. p. m.; Westinghouse, direct driven by Worthington 180 h. p. diesels Remarks This large twin screw diesel tanker is now under construction by the Sun Shipbuilding & Dry Dock Co. and will be launched about Febru- ary next. All auxiliaries in engine room, and the steering gear, are electrically driven. All of the deck machinery and the cargo pumping system will be steam driven. This vessel is under construc- tion for the California Petroleum Steamship Corp. Twin screw diesel tanker—Main drive two 2100 H. P. each, Sun Doxford engines MARINE REVIEW—November, 1927 Scavenger is attached to 15