Nautical Research Journal 197


11. Circle template on a drawing of a crook showing which portion will be fi led away to create the limber hole. Frame construction


T e frames are built directly upon their drawings. T e drawing is taped to a cork board or several layers of corrugated cardboard and protected with a piece of waxed paper. Common sewing pins spaced around the perimeter of the crooks will hold them in position. T e cleats, if properly made, will be given a center mark. T ey will then be glued into position on top of the paired crooks, with bottom edges of crooks and cleats fl ush and the center mark on the cleat aligned with the centerline of the frame drawing. Sewing pins will hold all in position.


Strips of 1/16-inch thick basswood about 1/4-inch wide should be cut from fl at sheet stock and glued across the top of the crooks a little above the sheer line. T is is but a cross spall to hold the frame during construction. It will be removed when planking is


completed and the tops of the crooks are sawn off at the sheer line. If cellulose nitrate glue is used for these cross spalls, they can be unglued with a few drops of acetone placed on the glue line. Finally, when the glue has dried and just before the completed frames are removed from the drawings, the following lines should be drawn across the face of each frame: sheer line, top of the second strake, and top of the fi rst or garboard strake.


Bottom or keel


As with any skeleton-built vessel, the keel is the basic structure upon which all other elements are built. In the case of this bateau the keel is of three bottom boards, side by side, each about a foot wide, twenty-four feet long and 1-1/2 inches thick. Here longitudinal strength comes from width as well as depth. Like the others it tapers toward the ends.


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