Sven Yrvind · video

¿Qué cubre este video?

Sven Yrvind is building a small cruiser and working out how to route the bumpkin halyard — the line that runs from the masthead down to the bumpkin — using the same pulley-wheel principle applied to a masthead halyard.▶ 0:07 Because the mast runs straight up rather than at an angle, he adapts the geometry accordingly.▶ 0:51 The current design uses four wheels, but he is considering reducing to two to simplify the system.▶ 0:48 The central engineering question he poses to his subscribers: is a 25 mm axle strong enough?▶ 1:45 The boat weighs approximately 1,000 kg, the load center sits 35 mm out from the axle centerline, and the load may distribute unevenly between wheels when the hull hits a wave.▶ 2:12 He notes that duplex chain — roughly twelve times stronger than 316 stainless standing rigging — is part of the setup.▶ 2:47 He has only a pipe on hand that day, which he judges too weak, and plans to test a proper 25 mm axle on Monday.▶ 3:26 He asks anyone with the relevant engineering knowledge to help calculate whether that axle diameter is adequate.▶ 4:14

Más de Sven Yrvind

Kai the bow paddle.jul 2026About safety.jul 2026My solution to crossing the Doldrums without using an engine.jul 2026Goose Barnacles Remower.jul 2026

De Sven Yrvind — ve el barco, la tripulación y cada video analizado del canal.