Geometry, rig interfaces and production details at the depth a designer works at. This section is organised as a reference rather than a second configuration sequence.
Nothing here is required in order to buy a sail. It is here because some owners want to understand why a sail is built the way it is, want to check a specification against their own judgement, or are configuring in Pro mode and want to know what the additional fields do.
Each page assumes the boat, mainsail type and essential configuration have already been established.
Geometry and shape
- Size, Roach and Shape — why rig dimensions are not sail dimensions, what roach costs, and what the girth measurements describe.
- How Mainsail Shape Works — mast bend, luff curve, draft and twist, and why they cannot be set independently.
Rig interfaces and structure
- Rig Interfaces and Installation Dimensions — luff and foot systems, what stays on the boat, and the head, tack and clew clearances that make the sail fit.
- Batten Hardware and Pocket Finishes — from the batten arrangement down to the receptacle and end of each pocket.
Controls and production detail
- Sail Controls and Production Details — cunningham, leech and foot lines, surface protection, windows and the markings carried into the production specification.
Shared material reference
Sailcloth principles are common to mainsails and headsails, so they are documented once:
The mainsail-specific choice and the configurator fields remain in Cloth and Construction. Reef positions, finishes and boat interfaces remain together in Reefing, so the same subject is not explained twice.