 Agincourt had one 2 @-@ cylinder horizontal return connecting rod @-@ steam engine , made by Maudslay , driving a single propeller using steam provided by 10 rectangular fire @-@ tube boilers . It produced a total of 4 @,@ 426 indicated horsepower ( 3 @,@ 300 kW ) during the ship 's sea trials on 12 December 1865 and Agincourt had a maximum speed of 13 @.@ 55 knots ( 25 @.@ 09 km / h ; 15 @.@ 59 mph ) . The ship carried 750 long tons ( 760 t ) of coal , enough to steam 1 @,@ 500 nautical miles ( 2 @,@ 800 km ; 1 @,@ 700 mi ) at 7 @.@ 5 knots ( 13 @.@ 9 km / h ; 8 @.@ 6 mph ) . 
