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Chapter One APPLICATIONS J/24 The J/24 fractional rigged sloop has been manufactured since 1977 at the rate of about 500 per year. The vessel has truly become a universally accepted one-design class allowing sailors to race on a boat-for-boat basis without regard for handicap allowances. Part of the fleet’s success is due to the manufacturer’s marketing skills and part is due to the boat’s all-around good performance. The hull construction is cored with Contourkore end-grain balsa. Its builder, TPI, manufactures J/Boats along with Freedoms, Rampages and Aldens (see page 7 for more information on TPI). International J/24 Sail- IMP IMP is a 40 foot custom ocean racing sloop that represented the U.S. in the Admiral’s Cup in 1977 and 1979. She was probably the most successful design of Ron Holland, with much of her performance attributable to sophisticated construction techniques. The hull and deck are of sandwich construction using a balsa core and unidirectional reinforcements in vinyl ester resin. Primary rig and keel loads are anchored to an aluminum box and tube frame system, which in turn is bonded to the hull. In this way, FRP hull scantlings are determined primarily to resist hydrodynamic forces. The resulting hybrid structure is extremely light and stiff. The one-off construction utilized a male mold. Admiral Admiral Marine was founded in Seattle about 50 years ago by Earle Wakefield. His son, Daryl, moved the company to Port Townsend in 1979 and built their first fiberglass boat in 1981. The launch of the 161-fooEtvviva in 1993 thrust the company into the forefront of customFRPconstructionE.vvivaisthelargestfullyfoam-coredboatbuiltinNorthAmerica. fifi Kevlar and carbon reinforcements are used where needed, as are Nohmoneexycomb cores for interior furniture. Figure 1-6 161 Motoryacht Evviva Built by Admiral Marine [Admiral] Figure 1-5 boat [J /Boats] 5PDF Image | Marine Componsites
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