Sven Yrvindvideo
Making masthead fittings
January 26, 2026 · 7 min · 2K views
What this video covers
Sven Yrvind fabricates a custom masthead fitting for a small, shallow-draught boat intended for a 14,000-mile non-stop circumnavigation through the Southern Ocean.▶ 0:17 He shapes a block of Tufnol to fit the masthead, drilling a 10 mm hole for the halyard and 7 mm holes for the topping lifts.▶ 1:20 The design incorporates a navigation light, requiring precise drilling for mounting screws and electrical cable routing.▶ 1:57 Yrvind simplifies the rigging plan by transitioning from two topping lifts to a single diagonal configuration.▶ 5:48 He uses a conduit to protect the wiring and plans to reinforce the cable entry point with fiberglass.▶ 6:03 The process involves iterative drilling and fitting to ensure the Tufnol block seats correctly against the mast.▶ 5:11
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