Wolff, Alfred R · New York, J. Wiley & sons · leaf 128
Fig. 32. AMERICAN WINDMILLS: OTHER TYPES. Ill … Fig. 33. 112 THE WINDMILL AS A PRIME MOVER. more effectively. As the velocity of wind increases, itpresses with greater force against this overhangingvane, and tilts it, thereby raising a counterbalancingweight. This lowering of the overhanging vane causesthe rotation of the turn-table to which it…
Windmills
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