The shaft hole in the launch should be extended through the keel and smoothed out. In order to prevent the water coming in at the joint of the deadwood and hull, it is suggested that a piece of thin lead pipe be inserted in the shaft hole and the projecting ends carefully hammered out onto the surface, set in paint and tacked; this will effectively prevent any leakage from this source.
The engine bed should now be fitted; it is of 1 1/2 in. oak, shaped as shown in Fig. 9. The exact dimensions of the engine bed must be known before building this boat. A line is struck through the center of the shaft hole and the measurements taken from the engine base laid off from it. The engine should be placed as low down in the boat as possible, the flywheel clearing the frames by two inches or more. The beds run fore aft and are placed at the proper distance apart to fit under the flanges of the bed. They should bear evenly on the cross floor timbers already fitted, and are fastened to them by screws wherever possible. Four or more angle braces should be fitted on the inside between the floors and the bed, to further stiffen it; these braces being of iron, lx1/2 in. with 4 in. arms. This construction should make a very strong bed and allow very little vibration.
The floor boards of the launch are of pine 5/8 in. thick and should be fitted around to lie flat on the cross floor timbers. They should stop clear of the flywheel, leaving enough room for the hand, while starting the engine. They are fastened down with screws to admit of easy removal. Outside of the flat portion there are two or more strips about 3 in. wide and $ in. thick bent around as additional protection extending, as will be noted in Fig. 9, to just abreast the engine.
The floor in the after end is raised, as shown, to a 2 or 4 in. higher level. It must be fitted by trial to the side of the boat, a few high cross timbers of light stock being put in to hold it. The shaft will probably cut through the floor; in this case a small sloping box of wood or guard of brass can be made to cover.
The triangular space in front of the forward seat should be filled in with either a solid piece nicely fitted or preferably a grating, as shown in Fig. 8. The latter is preferable, as it looks and is much lighter. In making this grating a frame is built of pieces 2 1/2 in. wide. The fore and aft strips are | in. square, let into the side pieces and set 3/4 in. apart. The cross strips are 1/2 in. wide and 1/4 in. thick, let into the fore and aft strips and set 3/4 in. apart. This grating sets in on the same strips which support the seat, and a small cleat is fastened on the stern to hold the forward end.
The rudders should be shaped as in the sketches, that for the small boat being | in. thick, and that for the large one } in. Fig. 9 shows that for the launch cut out to admit the propeller. A cleat is fastened across the bottom to prevent warping. Regulation rudder braces are used to hang the rudder, two being necessary. The skeg is of galvanized iron l 1/2x 3/8 in., bent so as to clear the propeller and still close the space and prevent lines and moorings from catching on the propeller or rudder. It is fastened to the keel with galvanized iron screws. The top of the rudder is tenoned down to fit the rudder yoke.
Stem bands should be fitted of the same width as that of the face of the stem. The pattern should be chosen that has a broad flat palm to fit over top of the stem, or else the upper end of the band must be bent at a right angle to fasten over on the stem and retain the several pieces in the right position. The band should be long enough to cover the joint between the stern and the keel. A strong eye should be fastened on the inside of the stem to fasten the painter to.
Rowlocks for the large boat should be of the pattern which screws on to the side of the gunwale, no blocks being required. One pair only will be required, and they should be fitted to the forward seat.
Spruce oars should be used; for the small boat 7 ft. are best for salt water, and 7 1/2 ft. for fresh water; for the launch 8 ft. length is required. It is recommended that they be fitted with a joint similar to that of a fish ing pole, as they should seldom be required; they should, however, always be carried.
The final painting and finishing may now be done. After the pores of the canvas are well filled with paint the surface should be rubbed lightly with sandpaper and another coat applied; this should continue until the grain of the canvas, has entirely disappeared and the surface is smooth, when the finishing coat may be applied. The top streak looks very nicely if left bright, and the same applies to the inside work, if the stock is good. All bright work which has not already been so treated should have a coat of shellac and be rubbed down, afterwards putting on two coats of best spar varnish. None but the very best spar varnish should be used, as poor varnish will soon wear off and allow the wood underneath to suffer.
It must be remembered that boats of this type, while naturally strong and durable, must be well taken care of and not abused; they must be kept well painted, as lack of it will cause the canvas to wear rapidly. With proper care, however, this style of boat will last as long as any other.
The engine for the power boat should be 1 1/2 or 2 h. p. and should be as light weight as possible and of moderately high speed, as this type vibrates the best.
The gasoline tank should be placed under the forward grating and the pipe led either under or alongside of a floor board, where it cannot be damaged About a ten gallon tank would be advisable for this size boat. The batteries and coil should be placed in a watertight box under the middle seat; a double set of batteries should be carried.
Detailed directions for installing the motor will not be given, as they have already been given in a preceding description, and also there are individual features regarding each engine which must be considered separately. Most builders of engines give a piping diagram with the engine or would willingly do so if requested at time of purchase, and from this the detailed directions may be obtained.