Turn to the nomogram (fig. 4-9) to obtain an esti-
laminates up to three-fourths of an inch thick can be
mate of the materials required. Draw a straight line
obtained from figure 4-9.
between scale A (average diameter and/or average area)
Round or oval-shaped repairs are preferable to
on the left side and scale B (thickness) on the right side.
ensure that you get a better bond and less chance of
Where this line intersects scale C, read the approximate
cracks in the base material. You should never use
amounts of cloth and resin required. Note that the
rectangular cuts with sharp comers. To estimate the
estimate exceeds the actual requirement by 30 to 40
amount of resin and glass reinforcement required for
percent, particularly with respect to cloth, to allow for
a round patch, determine the thickness of the laminate
wastage. Select from the kit the number and size of cans
and the average diameter. For a rectangular or oval
of resins and hardener required. To avoid waste, open
and mix the cans as they are needed.
patch (fig. 4-10), the average area must be estimated.
Figure 4-9.--Estimating materials.