Wolff, Alfred R · New York, J. Wiley & sons · leaf 96
round parallel with the rudder, thus presenting only theends of the slats to the wind. The arms / are boltedto a centrepiece, 4, as shown; this spider form ofsupport 4 being a characteristic part of all Americanvertical windmills. This form of wind wheel is known asthe rosette pattern. In high… … Fig. 13. 8o THE WINDMILL AS A PRIME MOVER. as the wind pressure again decreases, and thus the wheelis again brought more normal to the wind. Thus auniform rate of speed is maintained, proportioned to theposition of the weight 13 on the lever. The parts of this mill are accurately fitted to…
Windmills
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