The eleven sheets laid side by side would, of course, present a length of 22ft., but the overlap and the segment of the curve cut from those near the ends would reduce the length of the boat to 19ft.
Our diagram is on a scale of a quarter of an inch to a foot, but this is somewhat small for the needful accuracy; therefore if anyone intends to build, we would advise him to copy it on a scale of at least one inch to a foot, in which case the halves will represent six inches and the quarters three, and if he has a rule divided to one-twelfths, his work will be much facilitated.
It would be better to make, as we have done in preparing this description, a model block on which to test his work; indeed we would advise this in all cases of intended boat building. If the boat is to have a bow and stern distinct from each other, the model must be of the whole length, but may be of only half the breadth. If both ends are to be alike, it may be half the length and breadth, or one quarter of the boat.
In the present instance, take a piece of deal, as clean and straight-grained as possible, 19in. long (or 21in. if you wish the ends to come to a point), 4in. wide, and 3in. deep. Having smoothed this, draw a line along the centre of the top and bottom, connecting them by perpendiculars at the two ends; then on the top set off the line of one-quarter of the gunwale, or outer line, taking the breadths from the section in Fig. 3 ([p. 119]), and their distances from the centre, from the elevation in Fig. 2 ([p. 119]), bearing in mind that the centre means not either of the edges, but the middle of that marked as the central sheet. It will save trouble to cut out a piece of card to the size of this quarter, and trace the corresponding ones on the top and bottom of your block; then copy the elevation given in Fig. 2, and trace this, as before, on both sides. Now fix the block, with one end up in a bench vice, and with a narrow frame saw cut along the gunwale lines nearly to the centre, but do not cut them quite off, or you will lose your elevation lines (if a friend helps you by guiding the other end of the saw to the line on his side, you will be more certain to cut truly); then turn the block one-quarter round, and cut the line at top and bottom. Now place the other end uppermost, and repeat the process; and lastly, finish the cuts, and detach the superfluous pieces.
Take a piece of card or thin stuff, and draw on it the midship section, and cut this away, leaving a corresponding hollow; round off the edges of your model until she fits this hollow, and of this size 2in. of the centre must be left. Do the same with the diminishing sections, forward and aft; then cut eleven sheets of card 2in. by 6in., mark a central line across each, and also along the bottom of the model; lay one sheet uncut across the midship section, and tack it there; mark each of the others after the outlines given in the diagram (Fig. 1, [p. 119]), but test them in their places before cutting them. Take care also that as you go forward each sheet overlaps that which is behind; but as you work aft, insert the front edge under the one before it. You may think this operation would be tedious; but having once gone through it, you will build your full-sized boat with confidence. And let us again assure you that time spent in obtaining a preliminary certainty of your plan is saved over and over again when you come to actual work.
The sheets having been cut to the proper shape, set the two points of the gauge ¼in. apart, and so that the centre of the space between them shall be exactly 1in. from the shoulder, and gauge these lines all round the sheets, then, commencing from the centre of the longest side, mark off spaces of 3in., and with a flat-ended punch, and a dolly or matrix, or, in lack of that, a hard block of end wood, drive ¼in. holes on all the sides except those which are cut with a curve. Then lay the centre sheet on the rib or mould, which, like the rough frame on which bricklayers construct an arch, gives it its proper curve, and, under one edge, lay the curved edge of the next sheet. Mark where the holes should come; remove it and punch them, and fasten the two sheets together temporarily with three or more of the screw bolts. Do the same with the successive sheets towards each end, and you will find that the copper shell, even without ribs or strengthening of any kind, will assume its proper form and will be tolerably stiff. If the sheets are truly cut, the result may be attained, even without a mould, by driving one hole in the centre of the curved side, bolting it to the straight edge of the other sheet, and then bending both round till the curved edge coincides with the straight one. In this condition you may decide on increasing the width of your boat by forcing the sides farther apart; this will increase her sheer or elevation at either end, and will diminish her depth, or you may incline to reduce her beam, which will give her greater depth and will reduce the sheer till the elevation of the gunwale presents nearly a straight line. It would be better, however, if circumstances permitted, to adhere very nearly to the form given in the drawing, and set up such a frame for working on as is shown in the illustration on the next page.