Fig. 4.—A Pinion-wheel Windmill.
You had better make a cardboard pinion-wheel first, then a tin one afterwards, as cardboard is so much easier to cut. A pair of heavy shears will be necessary for cutting a tin wheel, and a cold chisel for separating the edges of the blades.
Fig. 5.—Diagram for Pinion-wheel Windmill.
To Mount the Pinion-wheel drive a long nail through the center, through the hole in a spool, and into the end of a stick. Then nail the stick to a post or a fence top.
The Four-blade Windmill shown in [Fig. 6] has a hub 4 inches in diameter and 1 inch thick ([Fig. 7]). This should be cut out of hard wood. Draw two lines across one face, through the center, and at right angles to each other. Then carry these lines across the edge of the block, not at right angles to the sides, but at an angle of 45 degrees. Saw along these lines to a depth of 1¼ inches. The ends of the windmill blades are to fit in these slots.
Cut the blades of equal size, 9 inches long, 5 inches wide on the wide edge, and 1½ inches wide on the narrow edge, and fasten them in the slots with nails.