In order to get these various layers glued together dead true to their positions as indicated in the design, you must choose a section about amidships, say section 11, and with a square draw a line from that section, which is, of course, still showing on the surface of the layer, down the edge on either side, joining up with a line across the opposite face. Also vertical lines at each end of the midships line must be drawn on the wood, great care being taken to get the midships line on the under face of the layers dead opposite each other.
If your outfit contains half a dozen carpenter's hand screws, these can be used; but if not, it will be necessary to purchase from a hardware store eight seven-inch bolts and nuts 3/8 inch in diameter, with one washer for each, and to make up four clamps, as shown in [Fig. 156].
You will start by gluing layer C to layer D, blocks being placed between the surface of the layers and the clamps to prevent bruising the wood. These two are then glued to layer B, and when this is thoroughly set they are glued to the layer A. The best glue to use for this job is marine glue, which does not dry too quickly, and so gives plenty of time to see that the layers have not shifted. In every case one clamp should be placed at each extreme end of the shorter layer, so as to insure the ends making contact, the other two being placed equidistant.
While waiting for the glue to set, you can be preparing the four layers (shown below D) for the lead keel pattern. The lines must be cut out, in this case, with a chisel, as it will be noticed that the lower faces must be left wide enough to receive the top face of the layer beneath it.
It will be noticed that the under face of each of these layers extends beyond the top face aft, and allowance must be made for this. On laying off the lines on the fin layers, do not join up with a point each end, but leave about 1/8 inch thickness, as shown on the drawing.
These layers must be drilled through to take the keel-bolts, which are made from two motorcycle spokes, twelve-gage. These should be cut to a length of 51/2 or 6 inches. Great care should be taken to insure that the midship lines are exactly vertical over each other when these layers are glued up.