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Nacra 20 main sheet blocks #106986
05/14/07 05:54 PM
05/14/07 05:54 PM
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TampaN20 Offline OP
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TampaN20  Offline OP
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anyone know the Harken part numbers for the mainsheet blocks? the carbo ones that upgrade you to 10:1 are they still 57mm?

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Re: Nacra 20 main sheet blocks [Re: TampaN20] #106987
05/14/07 06:22 PM
05/14/07 06:22 PM
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zander Offline
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zander  Offline
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I dunno the part number but they are 57 mm, I have the triple lower, quint top and a double with becket in between.

You could probably get away with a 40 mm double with becket but the 57 is not in the way and I think the becket is way stronger, that's where mine ends.


Always borrow money from a pessimist. He won't expect it back.
Re: Nacra 20 main sheet blocks [Re: zander] #106988
05/14/07 06:28 PM
05/14/07 06:28 PM
Joined: May 2002
Posts: 3,114
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MauganN20 Offline
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It's been posted here before. I think. A search might do the trick.

Re: Nacra 20 main sheet blocks [Re: zander] #106989
05/14/07 06:39 PM
05/14/07 06:39 PM
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zander Offline
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zander  Offline
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Actually I looked them up, the the triple ratchamatic w/becket is #2630, the double w/becket is #2603, and the quint is # ?? Power Dave has them. I did mine basically like this picture I found on here.


The only difference is that my double with becket is 57 mm and I attached it to the top of the triple and the end ties off to the top of the double.

Attached Files
108135-10-1_mainsheet.jpg (123 downloads)

Always borrow money from a pessimist. He won't expect it back.
Re: Nacra 20 main sheet blocks [Re: zander] #106990
05/14/07 08:31 PM
05/14/07 08:31 PM
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Michigan
PTP Offline
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where can you get the quints? How much are they? I think the loads drop down so much at 10.1 that 40mm carbo double would work fine strength wise

Last edited by PTP; 05/14/07 08:32 PM.
Re: Nacra 20 main sheet blocks [Re: PTP] #106991
05/14/07 11:05 PM
05/14/07 11:05 PM
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TampaN20 Offline OP
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TampaN20  Offline OP
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Thanks for the info and pics Zander, I currently have the 57mm triple carbos with a block on the lower making it 8:1, have people found the 10:1 beneficial, I can see how it would help upwind.

Re: Nacra 20 main sheet blocks [Re: PTP] #106992
05/15/07 12:05 AM
05/15/07 12:05 AM
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Posts: 713
WA, ID, MT
davefarmer Offline
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The best prices I've found on Harken blks is from Rigging Only (508 992 0434,). They have to get them from Harken, so it might take a couple weeks. Rick has 'em too. I'd avoid using the 40mm blks, everything that can be done to have it run freely is important.

Dave
SC20, Boyer MK II, Flight Risk

Re: Nacra 20 main sheet blocks [Re: davefarmer] #106993
05/15/07 09:09 AM
05/15/07 09:09 AM
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Posts: 263
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zander Offline
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zander  Offline
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not to take anything away from Rick or anyone else, I got mine from David Mosely at www.powergroovesailing.com What can I say he's a heck of a guy.


Always borrow money from a pessimist. He won't expect it back.

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