Care must be taken in mounting the motor in this way. If it is not mounted directly in line with the stern-tube the propeller-shaft will have a tendency to bind. However, with a little care no trouble should be experienced from this source. The storage battery used should be of the four-volt forty-ampere hour variety. This boat will be capable of carrying such a battery and this weight should just bring the craft down to her load water-line. The whole deck is made removable, so that the storage battery can be taken in and out at times when it is necessary to recharge it. A battery of this capacity, however, will drive a small motor similar to the type used on the boat for some time.
CHAPTER VIII
AN ELECTRIC SUBMARINE-CHASER
THE submarine chaser design given in the drawings and described in the text of this Chapter is a presentable little boat with pleasing lines and deck fittings. There is nothing difficult about its construction, and, considering the amount of work necessary to produce it, it is probably one of the most pleasing boats described in the book. If made correctly it will look "speedy" and shipshape.
The general outline of the boat can be gathered from [Figs. 86], [87], and [88]. [Fig. 86] gives a side view of the craft; [Fig. 87] shows the bow, while [Fig. 88] gives the deck-plan.
Notice first the construction of the hull. This is made according to the Sharpie type, but the lines are changed to give the boat a more graceful appearance. This is done by changing the shape of the deck and the bottom pieces. [Fig. 89] shows the various pieces necessary to construct the hull. It will be seen that the forward portion of the bottom piece is narrower than the deck piece, and broadens out so that it is wider at the stern than the deck piece. The deck piece has a maximum width of 5 inches, while the bottom piece has a width of 4 inches at the forward section. The deck measures 31/2 inches at the stern, while the bottom piece measures 41/2 inches at the stern. This produces a half-inch taper on each side of the stern. A half-inch taper is also produced on the bow portion.