AMSTERDAM – Bouwmeester Shipyard here has built an 8m (26ft.) tender made of Resysta, a wood substitute with all the qualities that this era of sustainability in yacht building is clamoring for.
The hybrid material, Resysta, is weather-proof, water, rot and UV resistant and recyclable. It comprises 60% rice husks, 22% rock salt and 18% mineral oil. Resysta has a long life, can be sawed, milled, drilled, sanded and bent without cracking, splintering or expanding. It does not discolor.
“We had no experience with it,” says Bouwmeester Managing Director Thomas Philippens. “We had a client asking for the material. So, we tested it by submerging it in water and covering it with paint, lacquer and epoxy. We found it had properties similar to wood.”
Eager to meet CE requirements, the yard built a standard fiberglass hull, cut Resysta into strips, affixed them to the hull, stained and varnished. It also used Resysta for the interior which is a more natural habitat for Resysta which is commonly used by furniture makers and hotel and restaurant interiors. “As far as we know, the tender marks the first nautical application for Resysta on single-hull boats,” says Philippens.
Developed in China, Resysta has a density of 650 kg per cubic meter, i.e. a tad heavier than Okoume marine plywood that is widely used for hull and deck components and bulkheads. Resysta is similarly priced and, unlike Okoume, rot-resistant.
Philippens loves taking on challenging assignments. The 8m tender client wanted an onboard toilet (it was built under the foredeck, next to a proportional Vetus Bow-Pro thruster) and hybrid propulsion. The 75HP Volvo Penta diesel and a 10 kW Bellmarine electric motor ended up in a long, midship engine box. There is also a built-in refrigerator.
Earlier this year, Philippens built, for a Canadian client, a hybrid-powered lobster boat, the totemic craft of North America’s eastern seaboard, to enjoy Amsterdam’s centuries-old canals as well as fishing in Canada.
Designer Pieter Bosgraaf boned up on the lines and history of the classic lobster boat which has an open starboard side to make reeling in and out of lobster pots easier
Bosgraaf came up with a semi-displacement, composite lobster boat with a foam-core, sandwich hull, reinforced by glass-fiber and epoxy resin. It can do 15 knots, sleeps 2 below the foredeck and has a 1.9m crawl space to pass under most of Amsterdam’s 1,500 bridges.