"The cylinders are each 16 inches in diameter and have a stroke of 6 1/2 feet. Each engine develops 450 Indicated Horse Power.[8] The paddlewheel is the massive construction of steel and wood, mounted at the stern, which propels the boat. It is 19 feet in diameter and 24 feet long. Six flanges, holding sixteen arms each, are evenly spaced along the paddleshaft. The arms are all held rigid by iron circles and blocking. Each arm and flange assembly forms one segment of the entire paddlewheel. The ends of the arms on each segment are attached to the paddle bucket planks which actually push the boat.[9]"

River boats, not oceangoing.