Tayana VANCOUVER 42, Operation And Maintenance Manual

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when owner maintenance has been reasonable.
3. Stainless Steel
Type 304 stainless steel is most common in yachts whether built in the Far East or
elsewhere, and that is what TaYang generally uses. Type 316 stainless steel is the best for
yacht application but it is considerably more expensive than type 304. There is little
difference in strength between them, but type 304 can tend to show corrosion which
while generally-harmless, is irritating
4. Bronze
Bronze fittings used on Tayana yachts are made in Taiwan. Tests by an independent
laboratory showed that the bronze used is of good marine alloy and grade. The bronze
castings are C86800 (55Cu, 37Zn, 3Ni, 2Fe, 3Mn alloy while such items as turnbuckle
barrels are C19000 alloy (98-7Cu, 1.1Ni, 0.25P).
5. Iron
TaYang uses black iron in fuel tanks and cast iron ballast. This is important because iron is
less susceptible to corrosion than is the steel that is occasionally used by some builders in place
of iron. TaYang does paint the iron with a good quality red lead primer to extend the life of the
tank.
D. Construction
Your Tayana 42 has been constructed of the finest materials, using the best techniques, and it
exceeds the specifications laid down by any of the most accepted standards-setting agencies. The
fiberglass schedule for the hull is shown in Figure II-1. Layup is done in a single mold by hand using
polyester resin.
The large female mold is separated longitudinally for cleaning and mold preparation. The gelcoat is
sprayed in and the first glass layer is laid up. The mold is then joined and all the remaining layups are
done in the assembled mold. While the hull is still in the mold, bulkheads are installed and the hull is
allowed to cure. The deck is laid up in much the same way except that a core of wood is used in
those deck areas which will generally be required to support loads such as decks and cabin top.
Ballast is made of a single casting of cast iron. The ballast casting is lowered into the keel cavity
and is fully encapsulated to become part of the hull. The deck and hull are joined by one of the
strongest methods in the industry. A diagram of the deck to hull joint is shown in Figure II-2.
Assembling the hull and deck is one of the most critical operations in the yacht's construction. The