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SAN DIEGO—Ferry—Double Ended—Diesel Electric DESCRIPTION A two-deck, single screw (one propeller at each end), double end- ed ferry boat for auto- mobiles and passengers between San Diego and Coronado, Calif., a dis- tance of 2900 feet be- tween slips. A special effort was made in the design of lines, propel- lers and the control of various engine speeds to give maximum ac- celeration and decelera- tion for 4-minute runs. Name—San D1EGo Owner—San Diego & Coronado Ferry Co. Builder—The Moore Dry Dock Co. Naval Architect—W. J. Pollock Launched—Sept. 14, ’31; comp., Nov. 9, ’31 Classification—American Bureau of Shipping HULL PARTICULARS Length over all, 204 feet 7% inches; length between perpendiculars, 192 feet 8 inches; breadth molded, 43 feet 6 inches; breadth ex- treme, 59 feet 11% inches; draft, light normal, 10 feet 5 inches; displacement, light normal, 779 tons; gross tonnage, 556 tons; net tonnage, SESS passenger capacity, salon deck, 200; automobile capacity, main deck, 58; oil fuel capacity, in tons, 23; speed on trials, 13.13 knots. MACHINERY PARTICULARS Main Engines—Three, 6-cylinder, 4-cycle, me- chanical injection diesel engines, built by the At- las Imperial Diesel Engine Co. Cylinder diam- eter, 12% inches; stroke, 16 inches. Each en- gine develops 350 horsepower at 275 revolutions per minute and is direct connected to an electric generator and exciter. Main Generators—tThree, each of 225 kilo- watts, 167 volts, shunt wound, direct current, with an over-hanging 30-kilowatt, 125-volt di- rect current exciter attached; built by Westing- house Electric & Mfg. Co. Main Propulsion Motors—Two, each of 750 shaft horsepower, 500 volts, 150/180 revolutions per minute, direct current, shunt wound, single armature, pedestal type bearings and separately excited at 125 volts; built by Westinghouse Elec- tric & Mfg. Co. Each propulsion motor is con- nected to a propeller at each end. Propellers, two, one at each end, cast iron, four-bladed, 7 feet 6 inches diameter, 9 feet pitch. Auxiliary Generators—The three attached, 30 kilowatts each, exciters referred to above under main generators furnish excitation for the main generators and propelling motors and power for auxiliary purposes. AUXILIARY EQUIPMENT Capstans—Two No. 4 Hyde Windlass Co. Steering Gear—Allan Cunningham Oil Purifier—The Sharples Specialty Co. Air Compressors—Main and Auxiliary, Rix Thrust Bearings—Kingsbury Machine Works Stern Bearings—B. F. Goodrich Rubber Co. Auxiliary Generator—Jenison gasoline motor and Westinghouse generator Pilot House Control—Westinghouse Air Whistle—Allan Cunningham Air Cooler—Schutte & Koerting Co. Pumps—wWarren; Woodin & Little; Romec Electric Motors—Westinghouse Marine Hardware—The Dayton Mfg. Co. The hull of this vessel up to the automobile deck is of steel on the transverse system of fram- ing and is subdivided by six steel watertight bulkheads. The automobile deck is a caulked wood deck on steel beams and tie plates and is sheathed with cedar. Top sides are of the open panel type, a fea- ture desirable when housing automobiles in an all-year mild temperature. i semana ze Brees aa ees Er a= all a app celle MARINE REview—April, 1932