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Commercial Marine Industry Marine Composites could easily produce fishing boats if there was a demand for such a vessel. The hulls can be fitted with bulbous bows, which are claimed to increase fuel economy and reduce pitching. The bulb section is added to the solid FRP hull after it is pulled from the mold. Delta Marine fabricates sandwich construction decks utilizing balsa core. LeClercq Another FRP commercial fishboat builder in Seattle is LeClercq. They specialize in building seiners for Alaskan waters. The average size of the boats they build is 50 feet. At the peak of the industry, the yard was producing 15 boats a year for customers who sought lower maintenance and better cosmetics for their vessels. Some customers stressed the need for fast vessels and as a result, semi-displacement hull types emerged that operated in excess of 20 fi knots. To achieve this type of performance, Airefxoam cored hulls with directional glass reinforcements were engineered to produce hull laminate weights of approximately three pounds per square foot. Young Brothers Young Brothers is typical of a number of FRP boatbuilders in Maine. Their lobster and deck draggers range in size from 30 to 45 feet and follow what would be considered traditional hull lines with generous deadrise and full skegs to protect the props. Solid FRP construction is offered more as a maintenance advantage than for its potential weight savings. Following the path of many commercial builders, this yard offers the same hulls as yachts to offset the decline in the demand for commercial fishing vessels. Commercial Fishing Fleet The majority of the FRP fishing fleet in this country was constructed during the 1970s and 1980s. For that reason, a state-of-the-art assessment of the market for those two decades is presented. The most important application of GRP in the construction of commercial vessels is found in the field of fishery. GRP constructions here offered many potential advantages, particularly in reducing long-term maintenance costs and increased hull life. In addition, GRP offers reductions in hull weight and provides cleaner, more sanitary fish holds. South-Africa GRP- fishing-trawlers of about 25 meters length have been built. Meanwhile, in the USA a few industrial companies have been founded which undertook the building of cutters from GRP. Most of these companies have a quite modern setup with excellent facilities warranting a processing technique as efficient as possible. In design as well as in construction, full attention has been given to economical considerations. When profitable, materials other than GRP may be used. The materials selected for the GRP structures of these trawlers and cutters are essentially extensions of current pleasure boat practice. Resins are generally non-fire retardant, non air-inhibited rigid polyesters, reinforcing a lay-up of alternating plies of mat and woven roving. The chopper gun is being used in limited areas for depositing chopped strand mat. Several of the designs incorporate sandwich construction in the shell. End grain balsa is the principal core material used, though it has often been restricted to areas above the turn of the bilge to minimize the possibility of core soakage or rotting in the wet bilge areas. Bottom stiffening is generally wood (pine or plywood) encapsulated in GRP. There is some question as to the 22PDF Image | Marine Componsites
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