Join Date: Feb 2012
Location: New Orleans Louisiana
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Re: Replacing forestay wire with dyneema?
Dyneema generally is not sutable for standing rigging. It has too much stretch and creep, as well as requiring larger sizes to try and compensate for these.
An annealed form of dyneema called Dynex Dux is being used for standing rigging, though I don't think for forestays under roller furling. Unlike wire it must be sized for creep control not breaking strength, so significantly stronger Dux is typically specified relative to the wire it replaces.
John Frapta at Colligio Marine or Brion Toss would be the ones I would call if I was considering taking this approach. Luckily my Corsair uses Dux from the factory, so I didn't have to figure out the details myself.
As for UV. The expected life span is about 8 years for the line, which is relatively easy to replace when needed. The fittings are reusable for pretty much ever since they are anodized aluminium.
Last edited by Stumble; 11-14-2013 at 12:06 PM.