To support the stern end of the tin can, drive a brad into block A in the position indicated in Fig. When you have connected the trigger mechanism, you will probably find slight readjustments necessary to bring about a nicety of operation. 273 and 277), rubber-band G is run up and over a pair of brads (#) driven into block A upon opposite sides, then over to screw I (Fig. To keep it from interfering with rubber-band K, which extends from a brad in the lower end of catch J to screw I (Figs. Rubber-band G extends from contact nail F to a screw I in the bow (Figs. 273 to 277 explain the assembling and adjustment of the trigger and catch blocks, also of the rubber-bands for springing them. Positions for the pivots are located in Fig. Use brads for pivoting the trigger and catch blocks between the sides of the slot. 271, then the wood between the saw kerfs can be split out with a chisel. The sides of the slot can be sawed down to the depth indicated by a dotted line in Fig. The bow of the hull must be slotted to receive the upper ends of trigger E and catch Ј, as indicated in Figs. Figures 277 and 280 show how the trigger catch J is made. Drive the nail F, a 3-inch finishing-nail, into the edge of the trigger at the angle shown. The simplicity of the work in making this mechanical toy will surprise you.įigures 276 and 279 show details of The Trigger for Releasing the Ballast. With a stream of water from a bath-spray forced against the stern, the boat may be propelled forward, and by directing the force of the stream against different portions of the boat you can cause the boat to go through all sorts of maneuvers, even to rising nearly to the surface.įinally, by driving the contact point forcibly against the foot of the bath tub, or against an obstruction placed on the tub bottom, the trigger may be sprung, and the boat, relieved of its weight, will rise to the surface. Then a gentle submersion to the tub bottom will not bring about the springing of the trigger, and the boat will remain upon the bottom. Instead of having the submarine dive, discharge its weight, and instantly rise to the surface, you can make the trigger mechanism less delicate, so that it will not be sprung by slight contact. To make the boat dive again, it is but necessary to attach the tin can and reset the trigger. Relieved of its ballast, the submarine rises to the surface. Catch Ј is sprung out of the way by rubber-band K, trigger E is sprung out of the way by rubber-band G (see dotted lines in Fig.
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