Reliability on a distant station meant being able to repair propulsion without a modern dockyard. A damaged screw or submerged shaft could require dry-dock work, while a paddle wheel could be lifted clear, repaired, and maintained with modest facilities. USS Mississippi and Perry's 1853-54 expedition to Japan show why the United States valued a paddle frigate whose wheels and sails could be serviced on the far side of the world. The arrangement concentrated the hardest ship-specific problem in the steam engine itself, which the onboard engineer had to nurse throughout the voyage.
Notable Point · 18:02-19:37
Why distant stations still valued paddle frigates
Accessible wheels made paddle frigates easier to repair far from dry docks, a decisive advantage for Commodore Perry's expedition to Japan.