طاحونة هوائية
The New Student's Reference Work/Windmill
See also Windmill on Wikipedia, and the disclaimer . The New Student's Reference Work (1914) — Windmill. Wind'mill', a wheel driven by wind to obtain power. Windmills vary in diameter from eight to thirty feet. The largest sizes in ordinary wind developing as high as four H. P. The ordinary pumpingwheel develops less than one quarter ......
Windmill
A windmill is a structure that converts wind power into rotational energy by means of vanes called sails or blades, specifically to mill grain (), but the term is also extended to windpumps, wind turbines and other appliions. The term wind engine is sometimes used to describe such devices.. Windmills were used throughout the high medieval and early modern periods; the ....