 Bayern and Baden were equipped with 11 coal @-@ fired Schulz @-@ Thornycroft boilers and three oil @-@ fired Schulz @-@ Thornycroft boilers in nine boiler rooms . Three sets of Parsons turbines drove three @-@ bladed screws that were 3 @.@ 87 metres ( 12 @.@ 7 ft ) in diameter . Bayern 's and Baden 's power plant was designed to run at 34 @,@ 521 shaft horsepower ( 25 @,@ 742 kW ) at 265 revolutions per minute ; on trials the ships achieved 55 @,@ 201 shp ( 41 @,@ 163 kW ) and 55 @,@ 505 shp ( 41 @,@ 390 kW ) , respectively . Both ships were capable of a maximum speed of 22 knots ( 41 km / h ; 25 mph ) . The first two ships were initially designed to carry 900 t ( 890 long tons ) of coal and 200 t ( 200 long tons ) of oil , though fuel bunkerage was subsequently increased to 3 @,@ 400 t ( 3 @,@ 300 long tons ) of coal and 620 t ( 610 long tons ) of oil . This enabled a range of 5 @,@ 000 nautical miles ( 9 @,@ 300 km ; 5 @,@ 800 mi ) at a speed of 12 knots ( 22 km / h ; 14 mph ) . At 15 knots ( 28 km / h ; 17 mph ) , the range decreased to 4 @,@ 485 nmi ( 8 @,@ 306 km ; 5 @,@ 161 mi ) , at 17 knots ( 31 km / h ; 20 mph ) the range fell to 3 @,@ 740 nmi ( 6 @,@ 930 km ; 4 @,@ 300 mi ) , and at 21 @.@ 5 knots ( 39 @.@ 8 km / h ; 24 @.@ 7 mph ) the ships could steam for only 2 @,@ 390 nmi ( 4 @,@ 430 km ; 2 @,@ 750 mi ) . The ships carried eight diesel generators ; these supplied each ship with a total of 2 @,@ 400 kilowatts of electrical power at 220 volts . 
