Fig. 439.
A more advanced form of construction, and one more in line with the methods of a regular boat-builder, is shown in Fig. 439, the essential difference between this and the form previously described being that regular bent ribs are substituted for the frames made of board, and the latter, after serving as moulds around which to build the boat, are taken out, the bent ribs being sufficiently stout to ensure strength and stiffness.
If you attempt this method the ribs must be carefully bent (see Bending Wood). Oak, ash, or elm is suitable for ribs. If a cooper's shop is within reach you can get the material there. It must, of course, be of good grain and free from flaws.
The process of construction is similar to that already shown. A suggestion for the arrangement of deck timbers (which can be of oak, ash, spruce, or any strong wood) is shown in Figs. 439 and 440, and for putting in a curved wash board or coaming in Fig. 440. For the latter a thin piece of straight-grained oak, elm, or ash can be used.
Fig. 440.
