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2 page layout of Cairo gunboat at Vicksburg Military Park.
Journaling comes from the sign.
Steam driven propulsion systems, like this one, powered riverboats churning up and down Western rivers in the mid-1800s. Cairo's engines and boilers are among the oldest and best surviving examples of this type of machinery.
Boilers Five long boilers made steam to power Cairo's engines. The boilers were heated with coal 2000 pounds an hour. Hot gases from the fire flowed through the tubes running the length of each boiler and heat from the gases turned water inside the boilers to steam.
Piston Steam drove two large pistons one on either side of the engine compartment.
Oscillating Arm The pistons pushed the oscillating arms that turned the paddlewheel. At full steam, Cairo
S engines could move the 888 ton gunboat at about 9 miles per hour.
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