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August, 1924 MARINE REVIEW FIG. 3—VIEW OF 6-INCH SINGLE STAGE DOUBLE SUCTION VOLUTE PUMP DIRECT-CONNECTED TO ELECTRIC MOTOR AS INSTALLED ON -MOTORSHIP SUPHENCO ual motor of 85 per cent, it will take 0.6 pounds of fuel per horsepower per hour for either electric driven pump unit. According to the above figures it will take 163 pounds and 92 pounds, re- FIG. 4-GENERAL ARRANGEMENT OF DIRECT CONNECTED PUMP SIMILAR TO TYPE SHOWN IN spectively, of fuel oil per hour to op- erate these pumps with steam, where- as with electric motor drive it will only take 15 pounds and 9 pounds, respectively, of diesel oil per hour. These figures are startling. In other ¥~APPROXIMATE m words, it takes from 10 to 11 times as much fuel to operate these units using the regular steam drive as it does to operate them by electric motor drive, generating the electric current by means of a diesel generating set. BiGes