CS27 Rigging

[cs271614]

Does anyone know the shroud tensions for a CS27? Or is there a good way to adjust them after the mast is stepped to achieve maximum performance without buying a tension gauge? Thanks for any advice

[gmackey]

Here's one way:

Nigel Calder describes a method which exploits the behavior of 1x19 wire to to stretch uniformly as tension is applied. I have also read this from other sources.

A 2 metre length of SS wire will stretch about 1 mm for every 5% of the wire's breaking strength.

Tighten the shrouds to 15 to 25% of breaking strength (3 to 5 mm) - split it between the two sides so that you do 1.5 to 2.5 mm on each side.

Tighten the backstay and forestay to between 25 to 35%.
Calder suggests that you tighten the backstay to 20% and due to the geometric effect, the forestay will then be tightened to 25 to 30%.

Do this by taping an exact 2 metre length of something to the wire and establish a reference point (could be a piece of tape, or top of turnbuckle), then measure the gap as you tighten the turnbuckle.

Note on the CS27 that the baby stay is not designed to force a bend in the mast, it is intended only to stabilize the mast, just tighten it snugly.

I have also read from other sources that it is very hard to overtighten the rigging when using ordinary hand tools.

Cheers,
Graham

[Dan Paluzzi]

Wow. That sounds like an easy straight forward method. I cant wait to try it.