. Farm machinery and farm motors. ome-made windmills.—Professor Rarbotir madean extensive study of home-made windmills and has hada very interesting bulletin published on the subject. Hehas classified them as follows: 1. Jumbos (Fig. 202). This type consists of a large fan-wheel placed in a box so the wind acts on the upper fans only. 2. Merry-go-rounds. Merry-go-round mills are those in which the fans in turning toward the wind are turned edgewise. 3. Battle-ax mills (Fig. 203). These are mills made with fans of such a shape as to suggest a battle-ax. 4. Holland mills. Somewhat resembling the
. Farm machinery and farm motors. ome-made windmills.—Professor Rarbotir madean extensive study of home-made windmills and has hada very interesting bulletin published on the subject. Hehas classified them as follows: 1. Jumbos (Fig. 202). This type consists of a large fan-wheel placed in a box so the wind acts on the upper fans only. 2. Merry-go-rounds. Merry-go-round mills are those in which the fans in turning toward the wind are turned edgewise. 3. Battle-ax mills (Fig. 203). These are mills made with fans of such a shape as to suggest a battle-ax. 4. Holland mills. Somewhat resembling the old Dutch mill. 5. Mock turbines (Fig. 204). Resembling the shop-made mill. 6. Reconstructed turbines (Fig. 205). Shop-made mills rebuilt. These mills, although of low power, are used exten-sively in the West Central States. Most of them are fixed 300 FARM MOTORS in their position and consequently have full power onlywhen the wind is in the direction for which they are those States in which these mills are used the wind. i FIG. 202—HOME-MADE JUMBO has the prevailing directions of south and northwest, andfor that reason the mills are generally set a trifle to thewest of north. To the casual observer the Jumbo mill (Fig. 202) seemsa very feasible means of obtaining power, but when oneconsiders the massiveness of the whole affair and thatonly one-half of the sails is exposed to the wind at onetime, also that full power is developed from the wind onlywhen the latter is in the proper direction, it will immedi-ately be seen that only in cases of dire necessity shouldone waste much time with them. I WINDMILLS 301 The cost of this type ofmill is very slight. It isstated by Professor Bar-bour that a gardener nearBethany, Nebraska, con-structed one which costonly $8 for new material,and with this he irrigatessix acres of the water-storage ca-pacity for such mills isenough, they will oftenfurnish sufificient waterfor 50 head of stock. Onefarmer has built a gang o
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