Sven Yrvindvideo
A change. Getting rid of the big rudder.
16. desember 2025 · 7 min · 3K visninger
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Sven Yrvind is modifying the rudder system on his small, shallow-draft boat, currently under construction for a planned voyage to New Zealand via the Southern Ocean.▶ 0:07 He is replacing a two-part rudder assembly—consisting of a rudder blade and a separate trim rudder—with a single, integrated unit constructed from G10 composite material.▶ 0:50 To determine the necessary surface area for the new rudder, Yrvind calculates 2% of the vessel's 7.6-square-meter total sail area, resulting in a target area of approximately 0.14 square meters.▶ 1:55 He creates a physical mock-up to verify the dimensions and ensures the design maintains 15 centimeters of clearance from the bottom of the hull.▶ 6:11 The new configuration aims to simplify the steering system while maintaining stability, aided by a daggerboard and a bumpkin that allows for additional drag resistance.▶ 5:06 Yrvind plans to test the final rudder geometry once the boat is positioned on its side.▶ 4:17
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