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carbon mast Nacra Inter 20 #279838
07/10/15 08:42 AM
07/10/15 08:42 AM
Joined: Jul 2012
Posts: 5
Rome, Italy
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elcazador Offline OP
stranger
elcazador  Offline OP
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Joined: Jul 2012
Posts: 5
Rome, Italy
What do you guys think about fixing, with rivets, a swivel cam block on an Inter 20 carbon mast to raise the spi? Is, in your opinion, the structure of the mast strong enough to sustain the stress of the sail?
Thanks in advance.

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Re: carbon mast Nacra Inter 20 [Re: elcazador] #279841
07/10/15 09:23 AM
07/10/15 09:23 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by elcazador
What do you guys think about fixing, with rivets, a swivel cam block on an Inter 20 carbon mast to raise the spi? Is, in your opinion, the structure of the mast strong enough to sustain the stress of the sail?
Thanks in advance.


Yes - but secure it with high modules lines like used on modern F18s. In fact, you only need to remove the bail and drill a couple of small holes in the side of the luff track.

Here is something close...Instead of tying the line all the way to the head of the mast, use the small eye strap that is already riveted there for the spinnaker halyard hoist tail. Actually...that's all wrong. Don't run the halyard up the mast either, just run it to the block and use the line at eye strap to hold the block in place...hang on, let me see if I can find a better example.
[Linked Image]

Last edited by Jake; 07/10/15 09:26 AM.

Jake Kohl
Re: carbon mast Nacra Inter 20 [Re: Jake] #279842
07/10/15 09:28 AM
07/10/15 09:28 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
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Jake  Offline
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South Carolina
Actually, do it sort of like in This Thread

you just don't need the double line going to the top of the mast...just a single going to the existing eye strap.


Jake Kohl
Re: carbon mast Nacra Inter 20 [Re: elcazador] #279843
07/10/15 09:40 AM
07/10/15 09:40 AM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline
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Posts: 2,490
On the Water
I think he might be asking about using a swivel cam cleat on the mast (new school) vs. the beam mounted cleat (old school N20) that holds the spin halyard.


Philip
USA #1006
Re: carbon mast Nacra Inter 20 [Re: P.M.] #279847
07/10/15 11:16 AM
07/10/15 11:16 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
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Posts: 12,310
South Carolina
Originally Posted by P.M.
I think he might be asking about using a swivel cam cleat on the mast (new school) vs. the beam mounted cleat (old school N20) that holds the spin halyard.


Aaaa...well...carry on then. I think all of ours were on the beam and not the mast. Heck...I had a hard enough time keeping the F18 one on the mast ON the mast...ripped off three times until I pulled everything apart and mounted a backing plate behind it.


Jake Kohl
Re: carbon mast Nacra Inter 20 [Re: elcazador] #279848
07/10/15 12:10 PM
07/10/15 12:10 PM
Joined: Jan 2008
Posts: 3,655
Portland, Maine
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ThunderMuffin Offline
Carpal Tunnel
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I had to have two beefy cam cleats on my beam for the halyard on my N20 to keep the halyard from slipping when team beef got on the wire during a spin reach.

Re: carbon mast Nacra Inter 20 [Re: ThunderMuffin] #279850
07/10/15 12:23 PM
07/10/15 12:23 PM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by ThunderMuffin
I had to have two beefy cam cleats on my beam for the halyard on my N20 to keep the halyard from slipping when team beef got on the wire during a spin reach.


We're going to end up doing that on the F18. I thought we had it solved but we lost the spinnaker halyard through the cleat three times in the FL300. I've tried three different types and style of line and although one worked better, it burned holes in the kite badly and was a poor trade off.


Jake Kohl
Re: carbon mast Nacra Inter 20 [Re: elcazador] #279851
07/10/15 12:51 PM
07/10/15 12:51 PM
Joined: Jan 2008
Posts: 3,655
Portland, Maine
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ThunderMuffin Offline
Carpal Tunnel
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We also had to put core back in the stripped cover... that ended up solving the issue long-term.

But the halyard with the core and a single cam didn't work.

Re: carbon mast Nacra Inter 20 [Re: elcazador] #279854
07/10/15 01:55 PM
07/10/15 01:55 PM
Joined: Jun 2003
Posts: 712
mikekrantz Offline
old hand
mikekrantz  Offline
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Joined: Jun 2003
Posts: 712
I solved the issue on the F20c. If it would hold for that beast on a reach, nothing could make it slip. There's a pic somewhere on the forum.
I cut a piece of 1/8" G-10 and mounted it to the ears of the swivel cleat. It had enough room to put H150 cleat and a micro cleat as a back up.

Re: carbon mast Nacra Inter 20 [Re: mikekrantz] #279855
07/10/15 01:57 PM
07/10/15 01:57 PM
Joined: Jun 2003
Posts: 712
mikekrantz Offline
old hand
mikekrantz  Offline
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Joined: Jun 2003
Posts: 712
Found it
[Linked Image]

Re: carbon mast Nacra Inter 20 [Re: elcazador] #279866
07/11/15 08:10 AM
07/11/15 08:10 AM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
old hand
bacho  Offline
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Joined: Aug 2011
Posts: 774
Greenville SC
I riveted a swivel cam cleat on the I20 mast, no problems.

Re: carbon mast Nacra Inter 20 [Re: bacho] #279886
07/13/15 07:36 AM
07/13/15 07:36 AM
Joined: Dec 2001
Posts: 5,590
Naples, FL
waterbug_wpb Offline
Carpal Tunnel
waterbug_wpb  Offline
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Joined: Dec 2001
Posts: 5,590
Naples, FL
I have a short section of "second" cover over my halyard around the area the cam cleat grabs when hoisted. So that area is fatter due to core + cover + second cover. The cover(s) are whipped to minimize slipping.


Jay


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