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S. S.. PRESIDENT HOCiVvER Main Machinery, A\uxiliaries HE main propelling machinery is of the well known steam turbine electric drive type arranged for driving twin screws. Each propeller is driven by a motor rated at: 13,250 shaft horsepower at 133 propeller revo- lutions per minute. The complete electric pro- pulsion equipment was supplied by the General Electric Co. Power for propelling the ship is developed in two steam turbines, each direct-connected to an alternating current electric generator. The two generators supply current to two propul- sion motors which are each direct-connected to a propeller. Current from the generators The rotors are milled out of a solid steel forg- to the propulsion motors 1s controlled by means ing and all wheels except the first are integral of various control apparatus mounted on a with the shaft. There are sixteen wheels all control panel. of which contain one row of blading, except Instrument Board and Main Controls pounds gage and 200 degrees Fahr. superheat and the vacuum at turbine exhaust is 28.5 inches. The primary consideration in the de- sign of the turbines was that of ruggedness. The main turbines are of the downward the first which has two. The blading is of exhaust type and are mounted directly above exceptionally heavy construction and the crit- their respective condensers. The steam con- ical speed of the completed rotors is well above ditions at the main throttle valve are 275 the highest running speed. The high pressure Case gees eae ayers: BEST EAU Cer rR Sle ee poe a> (53) PA BILGE We ad / 0K mee? SX“ moToR "MAIN CIRGP, iN = = AUX. CIRC, PU, SEA el G) AVG CD ed a) EX igi MOT, OR. CENTREY ipakss xx GN be 3600 GPM.AT2. i aeea 7 HOD ag eae ald SANYE FIRE B) ay 8 Hor OR. CEN TIE: COO EPHATIS. ka te SO YRS UI ices ise 5, 6! TX EPS 900 fx GPM. at oo WH aux! q | AUX. CONDENSATE ONDENSER rs Acad 1) “i Sealine | ai Li austcocoa (? 7 TAR S00 ba Ape y RS L,0. . ‘ an Se yaresas © jen Bt HS NOES, MAIN CIRC. RUM en Re Py te ae \ OU a @ 7 MOTOR PRIVEN ek 10,000 G.P-M. AT JOFT. Aux & tees *1.0.€O0 wage. REJECT. EINTER 4 R COND, A | AUX.AIR EJECT E INTER H, | AND AFTER COND, ts | THRUST. {| BEARING TA PUM PUM tpt eedegs (r : ‘ ON ee ee er ee, : IM: OR. CENTR 1 ' [| \es0Gem.ar i d 65 FT MAIN TURBO, GEN. , : iy ELEVATOR \/ FRIS| SS aaiguiee hie ; i \t ings LUB.OIL ORAI 4,0. HOT, FW. PUMP: a 4, KS K VS LUBR. O1L TANK & PUMPS PORI39Y 12°X12"*24 VS, TURNING GEA R 12-8 += Lf Do BER Bete HEY cf” Tig Lid 6} : 4 ° J ‘i ANDI\AFTER COND STORE Room on ee | J. FEED HEATS, MAIN FEED PUMPS, TURB. OR, FIRE ANDGENT. SERVICE P— 12°%8" x 24°'V.S. INSPECTION Maida ENGINEERS WORKSHOP 19, RS WORKSH EVAPORATORS ‘ : Ak SS) V4 . A AND STOREROOM Ry Pe SIRNAS AND STOREROOM oe ie ANG GALLE AR | EVA aoe bis = PLAN OF MACHY. FLAT ENGINE“ROOM-MAIN PROPELLING MOTORS-ELECTRIC MARINE REview—August, 1931 31