Rig Tuning
From Seawind1160Wiki
General
Description: Shane Grover, of Seawind, wrote a technical article in June of 2021 that outlines rig tensioning and tuning that is specific to Seawind catamarans.
Documents
Technical article: File:Rig Tensioning and Tuning.pdf
Notes
- I have also discussed the topic with circumnavigator, sailmaker, and rigger Jamie Gifford who as provided the following additional advice on the differences in diamond stays and shrouds tension:
- Catamaran rig tuning - BIG tension in the diamonds induces prebend creating a stiff/stable mast section
- Shrouds and headstay have much less tension.
- Over tensioned shrouds compresses the mast into its base structure and lifts the hulls, which change hull shape affecting things like doors opening/closing or compressing the mast step structure
- Reaching and upwind, very roughly around 15 knots of wind and higher, the leeward shroud will become loose/floppy due to normal shroud wire stretch - this is not a rig tune problem
- Catamaran rig tuning - BIG tension in the diamonds induces prebend creating a stiff/stable mast section
