Sven Yrvindvideo
Half Square, Half Circle – Less Weight, Less Draft.
September 18, 2026 · 8 min · 9K views
What this video covers
Sven Yrvind designs a new small sailboat featuring a hull shape that is half-square and half-circle to minimize weight and draft. The prototype draws 23 centimeters, or nine inches, and utilizes 50 kilograms of ballast, a 100-kilogram reduction from his previous designs.1:26 The center of gravity sits 12 centimeters above the waterline, which facilitates rapid self-righting during rollover tests.1:06 The hull design incorporates a pointed stem and a square midsection to improve performance and stability.1:45 Yrvind emphasizes that a shallow draft increases the number of available anchorages and simplifies transport on a trailer.6:46 The vessel is intended to carry four square meters of sail area and will feature a side-by-side rig and improved interior accommodations.4:41 The design prioritizes stability and ease of landfall after long offshore passages.6:41 Reducing draft and weight improves both downwind performance and accessibility to shallow coastal waters.6:54
More from Sven Yrvind
From Sven Yrvind — see the channel’s boat, crew, and every analyzed video.
The Sailing Directory Newsletter
One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.