What people are saying - Write a review
We haven't found any reviews in the usual places.
The history of windmills
Fig No Page 1 Diagram of old Persian windmill of the vertical axis type
Small horizontaltype windmill blowing an organ Hero of Alexandria
125 other sections not shown
Other editions - View all
actual alternative altitude anemometer angle annual mean wind average battery blades Britain calculated capacity cent changes considered constant construction cost countries curve described diameter direction discussed driven duration economic effect efficiency electricity energy estimated factor flow followed forces given gives greater ground gust height hill horizontal important increase indicated installed interest kilowatt less limited located machine maximum mean wind speed measurements Meteorological methods mill moving needed obtained operation output period placed plant Plate possible pressure probably production rated wind speed ratio records referred Report Research rotational rotor sails shown shows specific stations studies summit supply surface survey Table tests tower turbine unit utilization variations vary vertical wind direction wind power wind velocity wind-driven windmill World