 The propulsion system was rated at 14 @,@ 000 metric horsepower ( 13 @,@ 808 ihp ; 10 @,@ 297 kW ) , which produced a top speed of 18 knots ( 33 km / h ; 21 mph ) . On trials , however , the five ships had significantly varied performances . Schwaben , the slowest ship , reached 13 @,@ 253 metric horsepower ( 13 @,@ 072 ihp ; 9 @,@ 748 kW ) for a top speed of only 16 @.@ 9 knots ( 31 @.@ 3 km / h ; 19 @.@ 4 mph ) . Wettin , the fastest , managed 15 @,@ 530 PS ( 15 @,@ 318 ihp ; 11 @,@ 422 kW ) and a top speed of 18 @.@ 1 knots ( 33 @.@ 5 km / h ; 20 @.@ 8 mph ) . They carried 650 metric tons ( 640 long tons ) in their holds , but fuel capacity could be nearly tripled to 1 @,@ 800 metric tons ( 1 @,@ 772 long tons ) with the usage of additional spaces in the ships . This provided a maximum range of 5 @,@ 000 nautical miles ( 9 @,@ 260 km ; 5 @,@ 754 mi ) at a cruising speed of 10 knots ( 19 km / h ; 12 mph ) . Electrical power was supplied by four generators that each produced 230 kilowatts ( 310 hp ) at 74 volts , although in Wittelsbach the generators were rated at 248 kilowatts ( 333 hp ) . 
