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16 SARANAC AND CLASS—Coast Guard Cutter—Single Screw—Electric BR ee REL EHF Name—SARANAC Owner— United States Coast Guard Builder—General Eng. & Dry Dock Co, Naval Architect—United States Coast Guard Launched—April 12, ’30; comp. Sept. 23, ’30 Sister Ships—IrTasca, SreBpAGco and SHOSHONE; respectively, launched Nov. 16, ’29; Jan. 15, ’°30; Sept. 11, ’30; and completed, July t, o0- Bue. 20... "30: Jan, 7, "St HULL PARTICULARS Length over all, 250 feet; length between perpendiculars, 236 feet; breadth molded, 42 feet; depth molded, 26 feet 10 inches; draft 15 feet; displacement loaded, 2000 tons; bunker fuel oil capacity, 90,000 gallons; cruising radius, 8000 miles; service speed 16 knots. MACHINERY PARTICULARS Main Engine——One, steam turbine direct con- nected to an a.c. generator. A synchronous motor direct connected to the propeller shaft. The turbine of impulse reaction type suitable for operation with 260 pounds of steam and 175 degrees superheat and 28% inches of vacuum at full speed of 8600 revolutions per minute will develop 3220 horsepower at the motor. Both turbine and generator designed and built by Westinghouse Electric & Mfg. Co. Boilers—Two Babcock & Wilcox water tube marine boilers with total heating surface of 6336 square feet and total superheating sur- face of 696 square feet; working pressure 265 pounds; superheat, 175 degrees Fahr.; fuel, oil. Main Generator—One a.c. of revolving field type, with an output of 2600 kilowatts at 3600 revolutions per minute and 2300 volts, direct connected to turbine. Main Motor—oOne, 3220 shaft horsepower of _...... revolving field, salient pole, synchronous type, - 3 phase, 60 cycles, 44 poles at 163.5 revolu- DESCRIPTION This vessel is one of ten modern seagoing cutters for the United States coast guard, comprising a fleet su- perior to any in the world for its purpose. With commendable en- terprise the technical staff of the coast guard has done everything possible to fully util- ize the developments of marine engineering progress and has thus rendered the entire in- dustry a real service. tions per minute direct connected to propeller shaft. Built by Westinghouse Electric & Mfg. Auxiliary Power—Electric current for aux- iliary power, excitation and lighting furnished by four generating sets; three turbine driven and one driven by an a.c. induction motor. The direct current generator at 240/120 volts is for excitation only. The a.c. generator rated at 187.5 k.v.a., 240 volts will supply all current for motor driven auxiliaries and for lighting. This equipment all Westinghouse. AUXILIARY EQUIPMENT Pumps—wWarren Steam Pump Co. Windlass—Electric—American Engineer. Co. Capstan—Electric—American Engineer. Co. Steering Gear—Electro-Hydraulic-Hele-Shaw Pump. American Engineering Co. Propeller—Hyde Windlass Co. Induced Draft Fan—Sturtevant Anchors—Baldt Anchor, Chain & Forge Co. Oil Purifiers—De Laval Separator Co. Valves & Fittings—The Wm. Powell Co. Revolution Counters—Cummings Mach. Wks. Soot Blowers—Diamond Power Specialty Gyro Compass Equipment—Sperry Searchlights—Sperry Windows—Kearfott Engineering Co. Davits—Welin Davit & Boat Corp. Engine Room Telegraphs—Chas. Cory Corp. Feed Water Heater—Davis Engineer. Corp. Evaporator—Distiller—Davis Engineer. Corp. Fuel Oil Heaters—Davis Engineering Corp. Air Compressor—Westinghouse Air Brake Co. Galley Equip.——Westinghouse Elec. & Mfg. Co. Air Ejectors—Westinghouse Elec. & Mfg. Co. Electric Motors and Controls—Westinghouse Electric & Mfg. Co. TO | RES BROT ees Pere a MARINE REVIEw—April, 1931 Leia