Sven Yrvind · video

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Sven Yrvind modifies the bumpkin design on his boat, Urwind, to improve sail sheeting and storage.0:07 The new configuration features two side-mounted bumpkins that do not increase the vessel's overall length, allowing the boat to fit inside a shipping container.0:07 He uses a figure-eight knot and a removable tiller system to retract the rudder assembly for compact storage.1:04 Yrvind incorporates techniques learned from Japanese oyster fishermen, specifically the use of a "roo" or "yolo" oar system with a pin-and-hollow mechanism to prevent the oar from jumping out in rough weather.5:48 He plans to replace his current polyester lines with Dyneema or Spectra to reduce friction against stainless steel fittings.7:06 To secure the new bumpkin joints, he applies epoxy mixed with silica and injects additional epoxy into the vertical supports.8:57 Yrvind also considers future installation of an electric outboard motor but expresses concern regarding the fire risks associated with lithium batteries.3:00

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Four Sheets of Divinycell for the Hull Sides – I Think That's Enough.oct 2026Nervously Cutting the Divinycell Sheets.oct 2026Trying to Get the Sheerline Right.oct 2026More molds up.oct 2026

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