. Farm machinery and farm motors. 1 FIG. 204—MOCK TURBINE WINDMILL picked up around the farm. The axle can be made of apole smoothed up at the ends for bearings, or a short rodcan be driven in at each end. The tower can be made ofthree or four poles and the sails of pole cross pieces andold boxes. One of these mills 10 feet in diameter willpump water for 75 head of cattle. Near Verdon, Nebraska,a farmer uses one of these mills in the summer to pump waterfor irrigation, and in the winter for sawing wood. 424. Turbine windmills.—The term windmills as it iscommonly used refers only to the America
. Farm machinery and farm motors. 1 FIG. 204—MOCK TURBINE WINDMILL picked up around the farm. The axle can be made of apole smoothed up at the ends for bearings, or a short rodcan be driven in at each end. The tower can be made ofthree or four poles and the sails of pole cross pieces andold boxes. One of these mills 10 feet in diameter willpump water for 75 head of cattle. Near Verdon, Nebraska,a farmer uses one of these mills in the summer to pump waterfor irrigation, and in the winter for sawing wood. 424. Turbine windmills.—The term windmills as it iscommonly used refers only to the American type of WINDMILLS 303. 205—RECONSTRUCTEDTURBINE shop-made mills. They maybe classified by the form ofthe wheel and the method ofgoverning. 1. Sectional wheel with centrif- ugal governor and independ-ent rudder (Fig. 206). 2. The solid-wheel mill with side- vane governor and inde-pendent rudder (Fig. 207). 3. Solid wheel with single rud- der. Regulation depends uponthe fact that the wheel tendsto go in the direction itturns. To aid in rudder is often placedoutside of the center line ofwheel shaft (Fig. 208). 4. Solid or sectional wheel with no rudder back of tower, the pres- sure of the wind being depended upon to keep the mill squarewith the direction of the wind. Regulation is accomplished witha centrifugal governor (Fig. 209). 425. The use of the windmill.—The windmill receivesits power from the kinetic energy of the moving atmos-phere. Since this is supplied without cost, the powerftirnished by a windmill must be very cheap, the entirecost being that of interest on the cost of plant, de
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