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LF ER Ge eae OE Re ie NN ae 2 ee VOL. 40. CLEVELAND, APRIL, 1910. NEW YORK No. 4 Turbines for Cargo Ships NNOUNCEMENT was made 'in THe Marine Review for De- cember of the decision of the Parsons Marine Steam Turbine Co., Newcastle, England, to carry out exhaustive experiments in the application of turbines to cargo ships and of the purchase of the steamer Vespasian for the purpose: Particulars are just to hand in. a paper presented by Chas. A. Par- ons, of the Parsons Marine Steam Tur- bine Co., at the session of the Institution CABINS of Naval Architects, March 18, of the results of the experiments. The Vespasian was built in 1887 at Sunderland and, is of the following dimensions: Length on load water line ...... 2ro tt Beam, molten te. sc ees 38 ft. 9 in Depth, «molded 3.5 3 ee 21 ft. 2 in Mean licht: draught... 7:0 ..5:352 19 ft. 8in Displacement 0.45 Ges pe 4,350 tons. Block | coefiicient,. 3. Ai. cy ees 0.754 The vessel was fitted with an ordt nary triple-expansion surface-condens 'ing engine with cylinders 22% in., 35-in. and 59-in. diameter, 42-in. stroke. The air, circulating, feed and bilge pumps were driven from the in- termediate-pressure crosshead, with the usual arrangement of levers and links. The condenser was cast with the back columns of the main engine, and had a cooling surface of 1,770 sq. ft. The boilers--two in number--are 13 ft diameter by 10 ft. 6 in. long, with a total heating surface of 3,430 sq. ft.,. and grate area of 98 sq. ft., working under a pressure of 150 lbs. with nat: ural draft. The. propeller is of cast iron, four bladed, having a diameter, BOILER ENGINE CASING CAS'NG mance of the reciprocating engine were taken, the propelling machinery was completely dismantled and overhauled. The high-pressure piston valve cham- ber was rebored and new valve rings fitted; slide valves were replaned and. faced up; bearings were renewed, and other repairs carried out wherevei necessary to bring the machinery into an efficient condition and first-class working order. To obtain reliable measurements of water consumption, OPEN FCLE- ENGINECRS BUNKER ENGINES BOILERS BAL! cH. Fic. 1--PrRoFILE oF STEAMER VESPASIAN. of 14 ft. pitch 16.35 ft. and expanded area of 70 Sq, it. With a view to obtaining compara- tive data between the turbine installa tion and the reciprocating engine, it was decided to run trials with the vessel with her reciprocating engine previous to its removal and the install ing of turbines and gearing. Fig. 1 shows a profile of the vessel, and Figs. 2, 3. 4 and 5 the general arrangement of the reciprocating en- gine and_ boilers. Before proceeding on the voyage upon which data regarding the perfor- two tanks were fitted, each of 400 gallons capacity, with suitable change cocks and connections for the air pump to discharge through these meas uring tanks. It was necessary, for the purpose of obtaining data under service condé tions, that the vessel should be run at her loaded condition. Arrangements were consequently made to take a cargo of coal from Tyne to Malta, and on June 26, last year, the Vespasian left the Tyne in a loaded condition with a special recording staff on board, and on this voyage careful measure