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DESCRIPTION This is the last of ten cutters authorized by congress in 1926. The first five, CHELAN class, were built at the Fore River plant of the Bethlehem Shipbuilding Corp. Four, ITASCA class, were built by the General Engineering & Dry Dock Co. All ten ships are identical in hull particulars, but differ slightly in inter- ior arrangements and interior details. Saranac—sistership of the Cayuga Name—CayuGa Owner—United States Coast Guard Builder—United Dry Docks, Staten Island Naval Architect—United States Coast Guard Launched—Oct. 7, ’°31; comp., March 5, ’32 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 mo- tor direct connected to the propeller shaft. The turbine is of the impulse reaction type, operat- ing with steam at 260 pounds pressure and 175 degrees superheat and exhausing at 284% inches vacuum. At full speed of 3600 revolutions per minute, the generator will develop 3220 horse- power at the motor. The turbine, generator and motor were designed and built by Westinghouse Electric & Mfg. Co. Boilers—Two, Babcock & Wilcox watertube marine boilers with a total heating surface of 6336 square feet and total superheating surface of 696 square feet; working pressure, 265 pounds per square inch; 175 degrees Fahr. su- perheat; fuel, oil. Superheaters, oil burning equipment and feed water regulators all sup- plied by Babcock & Wilcox Co. Soot Blowers— Diamond Power Specialty Corp. Main Generator—One, 3-phase, 60-cycle a. c. ._._.. of revolving type, with an output of 2600 kilo- watts at 3600 revolutions per minute and 2300 Tfo. Bed [REPRE SePLL =f. TER TLE Inboard profile of Saranac, sistership of the Cayuga volts, direct connected to the turbine. Main Motor—One, Westinghouse, 3220 shaft horsepower, revolving field, salient pole, syn- chronous type, 3-phase, 44 poles, 60-cycle, at 163.5 revolutions per minute, direct connected to the propeller shaft. Auxiliary Power—HElectric current for auxil- iary power, excitation, and lighting furnished by four Westinghouse generating sets; three tur- bine driven and one driven by an a. c. induction motor. One of the turbine driven generating sets is a 62% k. v. a. alternating current gen- erator set for auxiliary power in port. Each of the other turbine driven sets consists of a tur- bine driving a 187% k. v. a. 240-vole alternating current generator for auxiliary power and a 3- wire, 120-240 volt direct current generator, all on the same shaft. The direct current generator AUXILIARY EQUIPMENT Pumps—wWarren; Quimby Windlass—American Engineering Co. Capstan—American Engineering Co. Steering Gear—American Engineering Co. Propeller—Cramp Brass & Iron Foundries Induced Draft Fan—B. F. Sturtevant Co. Anchors—General Steel Castings Corp. Oil Purifier—De Laval Separator Co. Valves and Fittings—Powell Gyro Compass—Sperry Gyroscope Co. Searchlights—Sperry Gyroscope Co. Windows—Kearfott Engineering Co. Lifeboats, Davits—Welin Davit & Boat Corp. Revolution Counters—Cummings Mach. Wks. Thrust Bearing—Kingsbury Machine Works Deck Covering—Selby, Battersby & Co. 1 = = } ! | \ t i \ ay 4 - er fiittpitiiirt : MARINE REviIEw—April, 1932