Step 30: Cut Out the Strake Ribs Each strake is reinforced with four internal ribs, which are cut out of one of the 12" X 12" sheets of 1/2", 5-lb. density foam [88]. Full-sized templates for these ribs are given in Figure 40. Pin the templates to the foam and cut out two of each with a scroll saw or a utility knife. We recommend that you cut these slightly oversize and sand down to a nice fit. If the ribs are undersize and do not make flush contact with the strake surface, they will tend to shrink during bonding, resulting in an uneven outer surface on the strake.
