 The ship was powered by two vertical triple @-@ expansion steam engines using steam generated by 20 Belleville boilers at a working pressure of 19 kg / cm2 ( 1 @,@ 863 kPa ; 270 psi ) . The boilers were fitted with economizers that preheated their feed water . The engines were rated at 16 @,@ 300 indicated horsepower ( 12 @,@ 200 kW ) and designed to reach a top speed of 18 knots ( 33 km / h ; 21 mph ) . Tsesarevich handily exceeded her design speed and reached 18 @.@ 77 knots ( 34 @.@ 76 km / h ; 21 @.@ 60 mph ) from 15 @,@ 254 indicated horsepower ( 11 @,@ 375 kW ) during her official machinery trials in July – August 1903 . She normally carried 800 long tons ( 810 t ) of coal , but could carry a maximum of 1 @,@ 350 long tons ( 1 @,@ 370 t ) . This allowed the ship to steam for 5 @,@ 500 nautical miles ( 10 @,@ 200 km ; 6 @,@ 300 mi ) at a speed of 10 knots ( 19 km / h ; 12 mph ) . Tsesarevich was fitted with six steam @-@ driven generators with a total capacity of 550 kilowatts ( 740 hp ) . 
