| 21. | The boats drift along on a gentle current, typically generated by a paddle wheel.
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| 22. | Paddle wheels were on the sides and it had two cranks for propulsion windlass.
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| 23. | Each had two auxiliary engines driving a paddle wheel, one either side of the ship.
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| 24. | The pump is driven by an undershot paddle wheel.
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| 25. | Many pedalo boats also use paddle wheels for propulsion.
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| 26. | Each rectangle contains a paddle wheel to make the water flow continuously around the circuit.
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| 27. | In April 1991, the starboard paddle wheel collapsed, dramatically changing the configuration of the remains.
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| 28. | For a paddle wheel ship, reversing the direction of the paddle will provide astern propulsion.
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| 29. | Because paddle wheels simply push off the water, their design and construction is very simple.
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| 30. | If we place a paddle wheel anywhere, we see immediately its tendency to rotate clockwise.
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