Sven Yrvind · video

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Sven Yrvind argues that his small boat is structurally safer than large ones, drawing on Galileo's square-cube law and Leibniz's kinetic energy formula to make the case.▶ 0:52 The square-cube law means strength scales with the cube of size while weight scales faster, so large boats become proportionally weaker.▶ 0:52 Leibniz's principle means a boat sailing at twice the speed carries four times the impact energy; Yrvind calculates that a larger boat traveling at 5–6 knots versus his 2.5–3 knots, and weighing roughly ten times more, delivers about 40 times the impact force — making his boat's collision energy roughly 2.5% of a large vessel's.▶ 2:43 His hull is a sandwich construction: multiple layers of polyester fiber in epoxy on each skin, with a 30 mm core, totaling at least 35 mm thickness.▶ 3:24 Drop-weight impact tests on 20 mm birch plywood punched through in one hit; his panel survived 57 strikes with only surface abrasion and no breach.▶ 6:34 He also cites 64 years of ocean sailing, including a Cape Horn rounding in a 19-foot boat in winter and a capsize and pitch-pole in a 20-footer that left the hull intact.▶ 8:13 Small boats are safer than large ones when well built, and the sailing press ignores them because there is little commercial interest in the segment.▶ 8:43

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