Post deleted by davefarmer
Dave:
Your link doens't work and you posted twice. I would contact Ben Hall at www.hallspars.com if you want a new one. Good luck of finding a used one. Carbon one would be nice. No idea how to repair it
Doug Snell
Hobie 17
Soon to be Mystere 4.3
www.tcdyc.com
That was a plywood mast? ....
A Nacra 20 mast is 32 feet - might be close enough or extendable.
Yeah, the builder, Malcom Davy, said it was a Barlow design (for carbon and foam), adapted for wood epoxy with a thin glass skin ( two layers of light glass cloth), based on a similar mast by the Gougeon Bros. May have failed because of an inadequate bond between the central web and the mast walls, or just been underbuilt. It failed going upwind in 12 to 14 knots of wind, after sailing around for a couple of hours fully powered up. It broke 6' above the mast base, and we had checked the diamonds several times, and found the mast in column. Seems a very odd place to fail, no attachments nearby, not midway between spreaders and diamond wire attachment. Need to determine whether this mast is basically sound and worthy of a repair effort and possible reinforcement (additional skins of glass/kevlar, carbon?), or underbuilt and will never be able to stand up the the 20 to 25knots I want to feel comfortable in.
Advice is most appreciated!
Dave
How would you go about extending a mast? I've got a 33' SC20 mast, which is a stout section, extending it would be my most affordable fix.
Dave
Dave
Would a Hobie CompTip do the job?
I doubt it is the same extrusion, it seems bigger. Anyone know for sure? Besides, I'm leary of just extending the top of the mast. I already have a spin tang mounted 4.5' above the hounds (halfway to the top), and it bends the mast above the hounds noticably. Maybe the hounds would need to be raised (and diamonds expanded?).
Dave
I would try a repair first seems by far the less expensive option while maitaining the right combo of mast (bend) and sailshape (Luff curve).
I know that carbon mast makes can/will add loops of unidirectional carbon or glass to reinforce the masts without affecting bend characteristics at all. Loops are pretty much "rings" of unidirectional fibres glued to the mast perpendicular to the length of the mast. The unidirectional fibres will add material and resistance to failure by keeping the mast in colom BUT they will not affect mast bend much because the rings can flex perpendicular to their plane.
So I would repair the mast and add uni-directional fibres to beef the mast up.
You must be aware that when you get a different mast that the cut of your mainsail will mostly likely be off resulting in inferiour handling and performance. Sometimes even really bad behaviour.
If you are interested in mast repair/adding loops then I think it will be help full to contact Phill Brander. He has good knowlegde of this topic and together with a friend is working on a new design of it. If interested then mail me at formula16class(at)hotmail.com and I will give you Phill adres
Good luck
Wouter
You need a Supercat 20 TR (tall rig) mast. Send an e-mail to Dan Berger...
danberger (at) mindspring (dot) com
He may just have what you need.