Wolff, Alfred R · New York, J. Wiley & sons · leaf 46
water flow-ing along the stream per square foot in a second, Lv^ Skdc v{ sin a — - cos a J cos ay which is the same as formula (I.), found directly asabove. Weisbach deduces (see Weisbach^s Mechanics,edited by Walter R. Johnson, p. 354) a value for thetheoretical mechanical effect, of which the… … Fig. 2. (Fig. 2) which the direction of the wind makes with CD^ then, on theassumption that the plane moves away in the direction of the wind, c — V the normal impulse of the wind on CD is iV = sin a Qy, Putting o 30 THE WINDMILL AS A PRIME MOVER. the section CN = G, then the quantity of wind Q…
Windmills
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