Toy Submarine Made of Shade Roller
This Submarine’s “Engine” is Wound by Means of the Propeller
The submarine shown really goes, and was made of a bit of tin, some lead, a few brads, and an old window-shade roller, with a good spring. The spring is the submarine engine. Saw off the roller 3 in. beyond the inner end of the spring, and shape it like the bow of a submarine. Flatten a piece of lead, and fasten it to the bottom of the boat for a keel. Experiment until the keel is of the right weight, and in the proper place, permitting the boat to move evenly, just below the surface of the water. For the propeller, cut a 2-in. tin disk as shown, and bend the blades into shape. In the center make a hole to admit the end of the spring, to which it is then soldered. Wind up the “engine” by turning the propeller. The shade-roller spring can also be used for other toy craft.—E. P. Sullivan, Arlington, Massachusetts.
¶Rub powdered graphite on rubber and asbestos gaskets so that they may be removed easily when desired.