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thrust is only 29 pounds per square inch when the vessel’s speed is 12% miles per hour. There are seven col- lars all water cooled in center core. The thrust works in an oil bath which is cooled by water pipes. In addition to the oil bath two duplex pumps are provided, one of which is a standby, to maintain a pressure of from 40 to 60 pounds per square inch on these collars. Cast Steel Sectional Propeller A Wheeler surface condenser of 2700 square feet cooling surface receives exhaust steam from the low pressure cylinder of the main engine. The air pump. is of the Wheeler air jet type, situated above the condenser. There are two of these pumps, each one equal to the necessary capacity for the con- denser. The condensate pump of Hori- zontal duplex type and 7% x 7% x 6 inches in size is located below and immediately under the condenser. The propeller is of cast steel and of sectional type with four blades. It is 15 feet 3 inches in diameter and is set at a pitch of 14 feet 9 inches. The blades are all ground smooth and are adjustable in pitch, one foot either way. The stern tube is of heavy cast iron with a stern bearing of brass lined with lignum vitae. The forward end is tapered to allow the INTERIOR OF PILOT HOUSE ON THE S§S. S. HARRY COULBY removal of the propeller shaft. Electrical current is furnished by three Engberg reciprocating steam en- gine generators. Two are of 25-kilo- watt capacity each and one of 10 kilowatts. The steering gear built by the American Ship Building Co. is of standard type, direct geared to quad- rant, with shaft and beveled gear transmission to wheel stand forward. The transmission shaft is run in roller bearings in a grease bath. Anchor chain is of 2%-inch diameter cast steel stud link type made by the National Malleable Co. The windlass is of the spurred gear type and has MACHINERY wih GENERAL ARRANGEMENT —esee aa OF TRIPLE | EXPANSION ENGINE t BULK LAKE FREIGHTER 28/2 - 41-67" x 42° STROKE HULL NO 798 THREE WATER TUBE B.anoW BOILERS 215 * PRESSURE _ BUILT BY THE AMERICAN SHIPBUILDING CO. CLEVELAND OH10 C.WH.JULY 1927 SCALE io’ AND 1/8" = | FOOT HOLD No.2 HOLD No.! = FORE PEAK TRIMMEO 184,545 curt. TRIMMED 166479 cu. FT. SELF TRIM. 159,067 CUFT. i} SELF TRMD. 142,644 CU. FT. 496 TONS ng tae he aan ey fea bead a tanh fog GY ped Rt 5) Gags We) eas a Lan boa aaa Faas pth Ft fet eg ot pot Ga JO ah nak Tot coheed oleate leeks f ap aye cota tale LT ET baad Fea bE rank the liege tong |e iame don PTT ET | |2ps\ oN | 1 ¥: ‘ 1 @ i Sho dU bites ides bed aiees ORL Uanse seed ckcctn dodo Leddabige Uoabed et eeet oka TY es so 4 ‘ wh de bd deb end eka tedobe: 75 as ry FREIGHTER, RECENTLY COMPLETED FOR THE INTERLAKE STEAMSHIP CO. BY THE AMERICAN SHIP BUILDING CO. MARINE REVIEW—October, 1927 17