Cambers damaging the mast

Cambers damaging the mast

Post by iac!jer.. » Wed, 18 Aug 1993 10:06:27


Here is a question for the knowledgeable windsurfers of the net:

I just purchased a new 2-piece mast (a $199 Serfiac Carbon 30 mast from a mail order company).
I also have a 92 (or 91) NP World Cup 6.0 sail which has 4 cambers.
My problem is that the cambers seems to scratch the mast when they rotate leaving a clear cut
on the mast (pretty similar to a cut you would get by using a knife).
With my previous mast (a BIC cheap stock expoxy mast) I didn't have any problem.

Now, I'm wondering if the coating of the mast is too weak/thin/cheap.
Have you heard about this kind of problem?
Is there a solution to it? (apply extra coating, use scotch tape, use a piece of mylar,
use a file to smoothen the edges of the cambers, etc...)

Thanks for your help.

[JP]

 +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 +->  I.T.G.                          Tel: (310) 216-6777
 |/   Culver City, CA 90230           Fax: (310) 216-0933
----  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   `

 
 
 

Cambers damaging the mast

Post by Henrik Klagg » Wed, 18 Aug 1993 21:19:44

There may be a reasonable way out: buy some of the new NPryde Roller Cams
which are standard in the Mk IV. Just replace one or two of your  Cams to
check out wether it works. You should be getting both no scratches and much
smoother rotation.

Cheers, Henrik

 
 
 

Cambers damaging the mast

Post by Jaime Corde » Thu, 19 Aug 1993 01:27:55

Quote:

>Here is a question for the knowledgeable windsurfers of the net:

>I just purchased a new 2-piece mast (a $199 Serfiac Carbon 30 mast from a mail order company).
>I also have a 92 (or 91) NP World Cup 6.0 sail which has 4 cambers.
>My problem is that the cambers seems to scratch the mast when they rotate leaving a clear cut
>on the mast (pretty similar to a cut you would get by using a knife).
>With my previous mast (a BIC cheap stock expoxy mast) I didn't have any problem.

>Now, I'm wondering if the coating of the mast is too weak/thin/cheap.
>Have you heard about this kind of problem?

My girlfriends NoLimitz(with the 3 foot jump limit: "NoLimitz" indeed) mast
had the same problem with the Gaastra external cambers (several years old).
She "solved" the problem by throwing the camber away, since she doesn't like
cambered sails. She had no problems with her old aluminum Mistral mast.

Not feasible with a 4 camber race sail, I realize, but it worked for her.

You might try upgrading to newer cambers, or perhaps gluing some soft one
inch hollow cloth "tape" to the inside of the cambers. The "tape" I'm
refering to is climbing "tape", made of synthetic cloth, similiar to what
many uphauls use (i.e. 4 knots). You can get it at REI or a climbing store
if you can't find it at the local West Marine or similiar boating store.

My old Waddells, and some old Norths, use cloth like this against the mast.
The newer Waddells have a small all-plastic "T" cambers, but I don't know
if they scratch the mast of not.

Good luck,

Jaime
--
-----------------------------------------------------------------------------

Vertex Semiconductor                              (408)456-8900x2337
A Toshiba Subsidiary         <your pithy saying here...>

 
 
 

Cambers damaging the mast

Post by Pierre St. Hilai » Thu, 19 Aug 1993 04:25:26

Quote:

>>I just purchased a new 2-piece mast (a $199 Serfiac Carbon 30 mast from a mail order company).
>>I also have a 92 (or 91) NP World Cup 6.0 sail which has 4 cambers.
>>My problem is that the cambers seems to scratch the mast when they rotate leaving a clear cut
>>on the mast (pretty similar to a cut you would get by using a knife).
>>With my previous mast (a BIC cheap stock expoxy mast) I didn't have any problem.

        I encountered that problem with my Powerex 2 piece masts and
the camber inducers of my Windwing Convertibles. I was told by someone
working at a local shop to put a thin layer of Marine Tex on the area
prone to wear and then sand it to a smooth finish. That mehod seems to
work quite well, since only the Marine Tex gets scratched. Apparently,
the wear from some inducers can seriously compromise the structural
integrity of a carbon mast.  

                                        Pierre St Hilaire
                                        MIT Media Lab