Fig. 49
Fig. 49 (a). The toy monoplane.
The 3⁄8-inch hole for the shaft should be bored first, and the propeller blades reduced to a thickness of 1⁄8 inch at the centre of the blade, and 1⁄16 inch or less at the edges.
The shaft needs to be strong, and should be made of a piece of 3⁄8-inch dowel rod. Make a saw cut with back saw in the end, which is to be fastened in the propeller.
When ready to assemble, push this end into the 3⁄8-inch hole in the propeller, drive in a soft pine wedge with a little glue, and a rigid fastening will result.