Reversible propeller

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“Reversing rod inside hollow propeller shaft: by twisting the blades round, the motion of the boat is reversed without changing the rotation of the screw."—Finley, 1917


Finley, John H. Nelson's Perpetual Loose-Leaf Encyclopedia (New York City: Thomas Nelson and Sons, 1917) 11:53


TIFF (full resolution)

2143×2400, 433.8 KiB

Large GIF

914×1024, 75.7 KiB

Medium GIF

571×640, 42.4 KiB

Small GIF

285×320, 16.6 KiB