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18 Diesel Direct Drive in Ferryboat Golden City One Engine—600 B. H. P. Engine Name of Engine—Washington-Estep; Year—1927 Builder—Washington Iron Works Cycle—4; No. of Cylinders—6; B. H. P.—600 I. H. P.—698; Action—Single; Injection—Solid Scavenging—None; Piston Cooling—None Bore—17 in.; Stroke—24 in.; R. P. M.—190-200 Piston Speed—760-800 feet per minute : Pressure Indicated—84.7; Pressure Brake—72.9 B. H. P. per Cyl.—100; I. H. P. per Cyl.—116.33 Mechanical Efficiency—86%; Stroke to Bore—1.41 Wkg. Strokes per Rev.—3; Leth. O. A.—45 ft. 9 in. Height O. A.—12 ft. 7% in.; Width—6 ft. 7 in. Weight—170,000 lbs.; Lbs. per b. h. p.—283 Reversing—No. By means of clutch at both ends Air Compressor—Single stage, attached to en- gine; Also 16 h. p. diesel engine auxiliary com- pressor Vessel — Name—Golden City; Type—Harbor ferryboat Main Drive—Diesel, clutch connected to propeller shafts at each end of engine; Reduction gears Length B. P. P.—176.65 ft.; Beam—30.5 ft. Depth—12.7 ft.; Gross Tons—353.37 Net Tons—233; Speed—13 knots No. of Propellers—Two; One at each end of vessel Fuel Consumption—Lbs. per b.h.p. per hr.—0.41 DESCRIPTION One engine of this size and type replaced a steam plant in the ferry GOLDEN CiTy. A special clutch and re- duction gear is pro- vided at each end of the engine. When one clutch is engaged the other is automatically released. Remarks The ferryboat GOLDEN CiTy, owned by the Gold- en Gate Ferry Co., is used as an automobile and passenger ferry from the foot of Hyde street, San Francisco, to Sausalito, Calif. The present diesel engine installation represents a conversion from steam. The original steam plant, which was removed, formerly served on the old de- stroyer FARRAGUT. The 600 brake horsepower diesel engine described and illustrated on this page was lined up to the steam thrust bearings and propeller shafts without any extensive altera- tions to the hull. A special clutch and reduction gear at each end of the engine are inter-connected and con- trolled from one wheel at the operating station so that when one clutch is engaged the other is automatically released. With the engine always - turning in the same direction maneuvering is accomplished by operating one or the other of the two clutches to bring the forward or astern pro- peller into action as desired. By this drive arrangement all the power may be applied to the after propeller while the for- ward propeller is allowed to turn idle. It is claimed that the overall efficiency is appreciably greater than with a solid through double end drive. Sizes of Engines Built Range from 36 to 1800 B.H. P. Diesel Ferry GoLtpeN City—San Francisco harbor—One 600 B.H.P. engine—Clutch connected at each end to shaft MARINE REVIEW—November, 1927