Fig. 238. [↑]
Figs. 239, 240. [↑]
Fig. 241. [↑]
The bearings for the propeller shafts are lashed to the outside face of the rear end of each spine, [Fig. 236]. The bearing is a piece of brass 1/16” × ¼” × 1”, and is bent to a right angle at the middle. A small hole is drilled for a brad into the side of the spine and the other hole is drilled to receive the propeller shaft, which is 1/16” steel wire. The shaft is bent into a hook after it passes thru the bearing. To prevent the rubber of the motor from touching the steel wire, which is injurious to the rubber, a small rubber hose is slipped over the hook. In this model, the propellers are pieces of veneer steamed and pressed into the spiral shape. The propeller shaft then is bent around the center of the propeller, has two little washers between this and the bearing, after which comes the covered hook, see [Fig. 237]. A piece of tin ½” wide and 1¼” long is folded about the propeller before the shaft is bent around. The shaft is soldered to the tin, the tin being secured by two small brads and shellac. A small tin rudder with a small fold in its upper portion may be slipped over the back cross-piece, [Fig. 238]. The fore plane is made of very thin spruce, shaped like [Fig. 239], and is bent up almost like a butterfly’s wings, [Fig. 240]. The wood is less than 1/16” thick. A double hook as anchors for the double motors, is bent and secured about the fore end of the framework. The hooks are covered with the rubber hose, the same as the propeller shaft, [Fig. 241].
