Soft sail (Bermuda rig) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/soft-sail-bermuda/  (sheet CC BY 4.0)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- Soft sails take camber from the wind and can be reefed; they need more angle of attack than a wing (Wikipedia).
- The IOM class uses a Bermuda sloop with fractional rig and three sizes (onemetre.net).
- Used on: International One Metre (IOM).

parameter  value or range  source
IOM A rig area  ~6000 sq cm  onemetre.net
IOM B / C rig  ~4100 / ~2700 sq cm  onemetre.net
IOM A rig aspect ratio  ~4.8  onemetre.net

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Wingsail — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Wingsail
- onemetre.net: The IOM class — web — Publisher's page; dimensions are facts — https://onemetre.net/OtherTopics/IOMclass/IOM.htm

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=soft-sail-bermuda