Wolff, Alfred R · New York, J. Wiley & sons · leaf 126
1, 32, and 33, has a solid wind wheel, but no rudder,and runs behind the mast, differing in the latter respectfrom all other solid wind wheels. The regulating-gearconsists of a small vane on a large lever directly in frontof the wheel, the vane portion projecting outside of thewheel. This vane is… … Fig. 31.
Windmills
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