Spurr's Guide to Upgrading Your Cruising Sailboat by Daniel Spurr

Author:Daniel Spurr
Language: eng
Format: epub
Publisher: McGraw Hill LLC
Published: 2006-03-15T00:00:00+00:00

FIGURE 9-31. Fillets must be made with putty where the side pieces meet the Masonite. The gentle curves created by the fillets permit better conformance by the fiberglass cloth.

Alcan Baltek Corporation (www.baltek.com) in Northvale, New Jersey, maker of Contourkore end-grain balsa, gave me the following lamination schedule:

20-mil-thick gelcoat

1½-ounce mat

6- to 7-ounce cloth

1½-ounce mat

½-inch Contourkore end-grain balsa

1½-ounce mat

6- to 7-ounce cloth

1½-ounce mat

1½-ounce mat

An optional layer of 6- to 7-ounce cloth on the outside will leave a smoother finished surface than mat. Flange thickness is about inch (10 mm), sufficient for bearing loads and for bolting through to the deck. Figures 9-32 through 9-35 show how the precut and darted rolls of mat, cloth, and balsa were glassed in. Ten-ounce cloth was used in place of 6-ounce, and the gelcoat dispensed with in favor of a simple paint job on completion. Or, I could have brushed on the gelcoat after pulling the hood from the mold, rather than brushing it on inside the mold before the mat and cloth were laid in.

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