Rigid wing sail — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wing-sail/  (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
- A wingsail is a rigid or semi-rigid airfoil with independently adjustable segments, like an aircraft wing with flaps. It gives more lift and better lift-to-drag than soft sails (Wikipedia).
- At 30 deg apparent wind a wingsail works at ~10 deg angle of attack vs 15 deg for a jib and 20 deg for a mainsail. Drawbacks: it can't be reefed, must be removed ashore and costs more.
- Used on: C Class Catamaran, USA-17.

parameter  value or range  source
AoA at 30 deg apparent wind  wing 10 deg; jib 15 deg; main 20 deg  Wikipedia (Wingsail)

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

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=wing-sail