Calculations for Flat Layouts, Navy

Describes several procedures to follow in calculating and laying out on paper and constructing metal parts from such designs as flanges, bends, beads, seams, and joggles. Both straight photography and drawings are used. "T" Squares & Triangles—Part I. (31 pictures-32 frames) Jam Handy. Fundamental uses of a "T" square and the 45 degree and 30-60 degree triangles; tools and equipment needed and correct care and usage; setting up for drawing; reproducing margins and title block of standard drawing form; correct use of hands, pencil, triangle, and "T" square in drawing margins; layout of title block. "T" Square & Triangles—Part II. (60 pictures-53 frames) Jam Handy. Manipulation of triangle to obtain angle lines; constructing of figure 1 with pencil, "T" square, 45 degree triangle and rule; layout of vertical and horizontal lines; layout of angle lines; construction of figure 2, using different triangle; duplication of figure 1; drawing figure 4, a hexagon; drawing figure 5; drawing figure 6, another hexagon. MATHEMATICS