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-75-in. diameter fan, no connecting door, but are entered from the outside or from the stew- ard’s hall, and, contrary to usual practice, there are no doors in the dining rooms opening into bedrooms. The cook’s and steward’s rooms are convenient to the galley and have bathroom adjoining. The deckhands, firemen and coal-passers, galley, pan- try, stores and mess rooms are all located in this house, each living room having its own shower bath and lavatory. Above this accommoda- tion is a steel house containing quar- ters for the engine room staff. The chief engineer has the entire after end of this structure, bedroom, bath- room, and office, with thwartship hall- way running the full width of the house; the entrance to engine room is from this hallway, the stair lead- ing down inside of engine casing. On the starboard side accommodation is. provided for the second engineer, and one spare room; on the port side is located the third and fourth engineers and two oilers. All the cabins are finished in oak or mahog- any, with painted fibreboard panel- ling, making an excellent finish. Coal Burning Scotch Boilers Steam is supplied by four scotch boilers, 138 feet 6 inches in diameter by 12 feet 0 inches long, with a total heating surface of 9088 square feet. Each boiler is fitted with three furnaces, 86 inches inside diameter; the total grate surface is 210 square feet, and the ratio of heating to grate surface is 48 to 1. The boilers are designed for a working pressure of 190 pounds per square inch. A forced draft installation is fitted in connec- tion with the boilers, and there is a driven by two cated in the engine room. The flue blowers are of the direct type, located in the smokeboxes, and operated by levers from the fire room floor. Steam Propelling Machinery The propelling machinery consists of a vertical triple expansion engine, arranged with the high pressure cylinder forward, followed by the in- termediate and low pressure cylin- ders, respectively. The cylinder diam- eters are 251%, 41% and 72 inches and the pistons have a stroke of 48 inches. The high pressure and _ in- termediate cylinders are fitted with piston valves, and the low pressure with a double ported slide valve. All valves are operated by double bar: link motion, and fitted with as- sistant cylinders. The engine is ar- ranged with three back and _ three front columns, fitted with ahead and astern slipper guides. The bedplate is of the girder type, and has 6 main bearings 14 inches in diameter. The connecting rods are of heavy -fork type construction 9 feet between centers, with the bottom ends of cast steel, lined with white metal. The crank pins are 11% inches in di- ameter by 13% inches long. The crosshead pins are 6%4 inches in di- ameter by 7% inches long, double. The crossheads are solid steel forg- ings, fitted with adjustable slippers lined with white metal on both ahead and astern faces. The usual type of horseshoe thrust bearings have been used, with nine collars, water cooled inside, and running in an oil bath. The stern tube is of heavy cast iron design, fitted with brass bush, lined with lignum vitae, 2 lengths, to permit of easy withdrawal and renewal of wood liners. The pro- peller shaft is 15% inches in diam- 7 x 5 inches vertical engines lo- So) eS Se ee at pS We 4 HOLO : he a om Wa es ow a Fceamege eS moe eter and the propeller is of the sec- tional type with four blades, and is 16 feet in diameter by 18 feet pitch. All pumps are independent of the main engine. The air pump is of the vertical simplex type, direct con- nected to a jet condenser, having an 18-inch steam cylinder, and 40- inch pump chamber, with a common stroke of 24 inches. Two main bal- last pumps of the centrifugal type 20 inches in diameter are arranged for filling and emptying the double bottom and side tanks through double manifolds fitted between the pumps. The cargo hold can also be flooded and used as ballast in rough weather, two filling and emptying pipes being connected to it from the manifolds in the engine rooms. Auxiliary Machinery Complete There are two auxiliary ballast pumps of the horizontal duplex type, 14 x 14 x 18 inches stroke, the suc- tion and discharge connections being 12 inches in diameter. Two main feed pumps of the vertical simplex type, 12 x 8 x 24 inches are fitted, and arranged independently of each other, so that either can supply the boilers while the other is being over- hauled. Other auxiliaries included in the installation are: general service pump, 8 x 5 x 12 inches, horizontal duplex; two 2%4-inch injectors; ver- tical spiral coil, film feed water heat- er, mate’s pump, 10 x 6 x 12 inches, horizontal duplex; 2 bilge pumps, 6 x 4 x 6 inches, horizontal duplex; fresh water pump "4x 2%x4 inches, horizontal duplex; 2 ash elevators, in the boiler room, one on each side of the ship. The electrical equipment consists of two 15 kilowatt direct connected generating sets. Refrigera- tion is amply provided for in a spe- cial chamber adjacent to the pantry. OWNED BY THE CANADA STEAMSHIP LINES—LARGEST VESSEL IN THE WORLD ON SHIP BUILDING CO., MIDLAND, ONT., CANADA MARINE REVIEW—August, 1927 19