Canting keel — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/canting-keel/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- A canting keel swings its ballast bulb to windward on a strut, giving righting moment with the boat nearly level; separate daggerboards then provide lateral resistance (Wikipedia).
- The VO70 cants up to 40 deg; its 6.5-ton bulb gives over 176,000 N m of righting moment with the hull level. Failures of rams and seals have caused sinkings (Wikipedia).
- Used on: Volvo Open 70, Wild Oats XI, Hugo Boss.
- The file is a reference example built by Xem Studio from the numbers above (Cant 40 deg (VO70); size from IOM fin reference.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

parameter  value or range  source
VO70 cant angle  up to 40 deg  Wikipedia (Canting keel)
VO70 righting moment level  >130,000 ft lbf (176,000 N m)  Wikipedia (Canting keel)
Banned in America's Cup class  2007  Wikipedia (Canting keel)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Canting keel — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Canting_keel

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/canting-keel/index.json
API: https://xemstudio.com/api/geometry?object=canting-keel