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main sheet string #138327
03/30/08 04:37 PM
03/30/08 04:37 PM
Joined: Mar 2008
Posts: 57
Minneapolis
Mpls_Nacra Offline OP
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Minneapolis
What is the best way to run the main sheet line. i have an 8:1. my current config it twists as it goes. how can i eliminate that twisting?


Dave Foster
Minneapolis
Nacra F16
-- Have You Seen This? --
Re: main sheet string [Re: Mpls_Nacra] #138328
03/30/08 05:50 PM
03/30/08 05:50 PM
Joined: Aug 2005
Posts: 2,921
Michigan
PTP Offline
Carpal Tunnel
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trial and error.

Re: main sheet string [Re: Mpls_Nacra] #138329
03/30/08 05:59 PM
03/30/08 05:59 PM
Joined: Jun 2001
Posts: 1,911
South Florida & the Keys
arbo06 Offline
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There is only one way to thread yer blocks. Check with harken or the manufacturer to get the correct pattern.

Re: main sheet string [Re: PTP] #138330
03/30/08 06:00 PM
03/30/08 06:00 PM

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trial and error.


I agree, just try every direction till you get it right. Takes some time sometimes, but you WILL get it right in time.

Doug

Re: main sheet string [Re: Mpls_Nacra] #138331
03/30/08 06:19 PM
03/30/08 06:19 PM
Joined: Dec 2005
Posts: 443
Edmonton, Alberta, Canada
bobcat Offline
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Put your system together with a twist.
No, really.
The axis of the top one is at 90 degrees to the lower one.

Re: main sheet string [Re: bobcat] #138332
03/30/08 07:52 PM
03/30/08 07:52 PM
Joined: Oct 2005
Posts: 1,152
tampa, fl
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ksurfer2 Offline
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K

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tampa, fl
true...once I figured that out...it was a piece of cake.


If your havin girl problems i feel bad for you son
I got 99 problems but my beautiful wife ain't one
Re: main sheet string [Re: ksurfer2] #138333
03/30/08 08:11 PM
03/30/08 08:11 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
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I agree with the trial and error plan. I spent probably close to an hour sitting in front of the TV reeving (sp) my 8:1 over and over before I got something that I thought looked correct without the sheet touching itself anywhere.

Re: main sheet string [Re: Karl_Brogger] #138334
03/30/08 08:51 PM
03/30/08 08:51 PM

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I agree with the trial and error plan. I spent probably close to an hour sitting in front of the TV reeving (sp) my 8:1 over and over before I got something that I thought looked correct without the sheet touching itself anywhere.


Yea it is a pain, <img src="http://www.catsailor.com/forums/images/graemlins/mad.gif" alt="" /> <img src="http://www.catsailor.com/forums/images/graemlins/confused.gif" alt="" /> BUT once you get it right. <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" /> OH so SWEET <img src="http://www.catsailor.com/forums/images/graemlins/shocked.gif" alt="" /> <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" /> <img src="http://www.catsailor.com/forums/images/graemlins/tongue.gif" alt="" />

Doug

Attached Files
Re: main sheet string [Re: Mpls_Nacra] #138335
03/30/08 10:26 PM
03/30/08 10:26 PM
Joined: Nov 2002
Posts: 606
League City, TX
flumpmaster Offline
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League City, TX
[Linked Image]

From the Harken site. A little small, but it looks correct. You can see the top block is oriented 90 degrees to the bottom block.

Things to look for when experimenting with roving patterns: Does the top block get pulled over at a funny angle under load (this will cause the line to jump off the blocks and incur a lot of friction)?
Do lines touch one another?
If lines are close are they moving in the same direction when sheeting in or out?

Chris.


Dave Ingram is my president. tcdyc rules
Re: main sheet string [Re: flumpmaster] #138336
03/31/08 01:58 PM
03/31/08 01:58 PM
Joined: Mar 2008
Posts: 57
Minneapolis
Mpls_Nacra Offline OP
journeyman
Mpls_Nacra  Offline OP
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Joined: Mar 2008
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Minneapolis
I have a different layout. it is older. I'll post a photo, later today.


Dave Foster
Minneapolis
Nacra F16
Re: main sheet string [Re: Mpls_Nacra] #138337
03/31/08 02:09 PM
03/31/08 02:09 PM

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Is it really just a case of " just try every direction till you get it right" ??? wouldnt there be an "optimal" way where there is the max purchase/strenght?

I have never been able to find good documentation online from Harken how to reeve my line so i called them... attached is what i got sent to me.

Attached Files
140397-harken.pdf (133 downloads)
Re: main sheet string [Re: ] #138338
03/31/08 02:38 PM
03/31/08 02:38 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Northfield Mn
The purchase or mechanical advantage won't be effected by how it is pulled though the blocks. What will effect it is drag from rubbing on itself or from binding. Strength I don't think I could comment on. The working loads of what these systems are capable of are usually far more than the loads that they actually see on the boat.

Attached Files
140400-IMG_1540.jpg (158 downloads)

I'm boatless.
Re: main sheet string [Re: Karl_Brogger] #138339
03/31/08 02:38 PM
03/31/08 02:38 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Carpal Tunnel

Joined: Feb 2005
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Northfield Mn
another pic from the other side

Attached Files
140401-IMG_1539.jpg (153 downloads)
Re: main sheet string [Re: Karl_Brogger] #138340
03/31/08 03:29 PM
03/31/08 03:29 PM

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good pics Karl. Are those 40mm or 75mm on top?

Re: main sheet string [Re: ] #138341
03/31/08 04:20 PM
03/31/08 04:20 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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57mm quad upper and 57mm triple with a becket on the bottom. I think the little block is a 40mm.

Came with the boat, I'm still not totally happy with the way it works, but it's better than it was. The sheet needs to be smaller I think as well, its 7/16 and doesn't run through the blocks very fast. I had 5/16 on my last H16 and if you dropped the sheet it just went ZIIIIIIIING. and you got t-bagged.

Re: main sheet string [Re: Karl_Brogger] #138342
03/31/08 05:52 PM
03/31/08 05:52 PM
Joined: Mar 2008
Posts: 57
Minneapolis
Mpls_Nacra Offline OP
journeyman
Mpls_Nacra  Offline OP
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Joined: Mar 2008
Posts: 57
Minneapolis
Andrew, these are great, only i have 4 accross the top and the becket is on the bottom ring. would one run 8 on the loop between 1 & 4, then down?


Dave Foster
Minneapolis
Nacra F16
Re: main sheet string [Re: Karl_Brogger] #138343
03/31/08 06:08 PM
03/31/08 06:08 PM

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57mm quad upper and 57mm triple with a becket on the bottom. I think the little block is a 40mm.

Came with the boat, I'm still not totally happy with the way it works, but it's better than it was. The sheet needs to be smaller I think as well, its 7/16 and doesn't run through the blocks very fast. I had 5/16 on my last H16 and if you dropped the sheet it just went ZIIIIIIIING. and you got t-bagged.


I take it you have a Tiger. On ours we used the stock Kite sheet as a mainsheet and then used swiftcord for the kite sheets.

Re: main sheet string [Re: ] #138344
03/31/08 06:13 PM
03/31/08 06:13 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Posts: 4,118
Northfield Mn
Quote
I take it you have a Tiger. On ours we used the stock Kite sheet as a mainsheet and then used swiftcord for the kite sheets.


FXone. Probably the same exact setup as the Tiger though.

Looking at flumpmaster's drawing from Harken I think I have mine correct. However it was done before it wasn't very good.

Re: main sheet string [Re: Karl_Brogger] #138345
03/31/08 10:11 PM
03/31/08 10:11 PM
Joined: Dec 2007
Posts: 1,430
california
F-18 5150 Offline
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california
karl yes its the same as the tiger. but im going to 10:1 now.


Richard Vilvens
Brand Ambassador
PSA Capricorn USA
R.Vilvens@yahoo.com
Fairfield, Ca
F-18 5150

http://www.capricornsailing.com/
Re: main sheet string [Re: Karl_Brogger] #138346
03/31/08 11:05 PM
03/31/08 11:05 PM
Joined: May 2002
Posts: 217
J
jcasto1 Offline
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Posts: 217
Karl's picture is very nice, exactly how I reive mine.

I'd like to add an idea that I use on my mainsheet. Notice that the end of the line dead-ends onto a becket. I added a small caribiner clip to the end of the line so I can quickly change from 8:1 to 7:1. I use 8:1 most of the time, but for light air days, I can quickly switch to 7:1 by detaching caribiner from padeye and attaching it to itself, essentially. Although it would seem to be "unbalanced" laods, since the end that is single instead of double is closer to center, it's not even noticeable.
I also have a swivel above the block, this helps blocks not get tangled.
I use mafioli swiftcord for my mainsheet line, it's really confortable and light.
I think I posted pix at :
http://www.catsailor.com/gallery/profile.php?uid=143


Jim Casto
NACRA 5.5 & NACRA 5.7
Austin TX
Lake Travis
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