Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 28-12-2014, 20:11   #31
Registered User
 
UNCIVILIZED's Avatar

Join Date: Jun 2014
Location: Up the mast, looking for clean wind.
Boat: Currently Shopping, & Heavily in LUST!
Posts: 5,629
Re: New Blocks for Mainsheet on 45 Footer

Quote:
Originally Posted by CaptNemoO2 View Post
Thanks. I tried to Google this setup but I had a difficult time figuring out what terms to search for. Most of my hits revolved around dinghys. I would like to find out more info, especially to double check the order the line runs through the 3 blocks on the boom, but it's proven to be a hard search! Any hints?

Sent from my SCH-I545 using Cruisers Sailing Forum mobile app
I'm not 100% clear on what you're asking, but these links may help you sort out your confusion.

Harken - System Diagrams
Harken - Mainsheet Systems
If not, then try & spell out what the problem is, & let us have a crack at it. Also, have a look in their online Product Support Section, there's a LOT of good info there.
__________________

__________________

The Uncommon Thing, The Hard Thing, The Important Thing (in Life): Making Promises to Yourself, And Keeping Them.
UNCIVILIZED is offline   Reply With Quote
Old 28-12-2014, 21:07   #32
Registered User
 
CaptNemoO2's Avatar

Join Date: Dec 2013
Location: Long Island
Boat: Beneteau Oceanis 510
Posts: 112
Re: New Blocks for Mainsheet on 45 Footer

Quote:
Originally Posted by UNCIVILIZED View Post
I'm not 100% clear on what you're asking, but these links may help you sort out your confusion.

Harken - System Diagrams
Harken - Mainsheet Systems
If not, then try & spell out what the problem is, & let us have a crack at it. Also, have a look in their online Product Support Section, there's a LOT of good info there.
I've been to Harken's site, it does not show this particular setup. I just figured any mainsheet rigging that dampens the shock loading of a jibe would have more information about it online.

As far as my question about rigging it goes is regarding the order the line is fed through the blocks on the boom. Having never seen this type of mainsheet setup before, I wanted to make sure it's rigged right (see my picture posted earlier). The previous owner had several things rigged wrong, like the vang was up side down. Flipping it back the right way increased it from 4:1 to 5:1.

Sent from my SCH-I545 using Cruisers Sailing Forum mobile app
__________________

__________________
CaptNemoO2 is offline   Reply With Quote
Old 28-12-2014, 21:17   #33
Registered User

Join Date: Feb 2013
Location: Amherst, MA
Boat: Catalina 350
Posts: 43
If it was me, I'd skip all the math and (in my opinion) under-engineered Harken stuff. I'd get a set of Garhauer blocks, with ball bearings, of the same dimensions (maybe use a double at the bottom if the pull geometry is entirely parallel), and a new main sheet. Better than new.
__________________
Sailor Bob 350 is offline   Reply With Quote
Old 28-12-2014, 21:48   #34
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
Re: New Blocks for Mainsheet on 45 Footer

Even though I like high tech gear in general, I use plain old Sta-Set (dacron double braid) of 11mm (7/16") for the mainsheet. The little bit of stretch saves the gear in a high-wind or accidental gybe situation. Low stretch (Spectra) lines can destroy the blocks, traveller, or track. The bit of stretch does not seem to cause a trim problem as it would in a halyard or guy. The money you save can be spent of nice blocks.
__________________
daddle is offline   Reply With Quote
Old 29-12-2014, 06:02   #35
Registered User
 
UNCIVILIZED's Avatar

Join Date: Jun 2014
Location: Up the mast, looking for clean wind.
Boat: Currently Shopping, & Heavily in LUST!
Posts: 5,629
Post Re: New Blocks for Mainsheet on 45 Footer

Quote:
Originally Posted by marinduque View Post
Even though I like high tech gear in general, I use plain old Sta-Set (dacron double braid) of 11mm (7/16") for the mainsheet. The little bit of stretch saves the gear in a high-wind or accidental gybe situation. Low stretch (Spectra) lines can destroy the blocks, traveller, or track. The bit of stretch does not seem to cause a trim problem as it would in a halyard or guy. The money you save can be spent of nice blocks.
On this, you might try Regatta Braid, it has about double the stretch of Sta-Set.

As to main sheets which are set up, or designed to minimize the shock from gibing, I don't know that such exist. Other than going to twin main sheets, & or preventers.
There are, however, several commercially made products designed to slow booms down (mostly when gibing). Boom-brake, I think, is one of them. But they're rigged independently of the mainsheet as far as I know.

Basically, they work on the same principle as a Figure-8 rappel device, only they're a lot bigger & run the line through a few more twists & turns, to increase friction (during a gibe).
Kinda' unnecessary if you ask me, but there are a number to chose from. Or one can go the DIY route, & fabricate something similar.

I say, ust leave a pair of preventers pre-rigged. KISS.
__________________

The Uncommon Thing, The Hard Thing, The Important Thing (in Life): Making Promises to Yourself, And Keeping Them.
UNCIVILIZED is offline   Reply With Quote
Old 29-12-2014, 06:45   #36
Registered User
 
UNCIVILIZED's Avatar

Join Date: Jun 2014
Location: Up the mast, looking for clean wind.
Boat: Currently Shopping, & Heavily in LUST!
Posts: 5,629
Re: New Blocks for Mainsheet on 45 Footer

Quote:
Originally Posted by CaptNemoO2 View Post
I've been to Harken's site, it does not show this particular setup. I just figured any mainsheet rigging that dampens the shock loading of a jibe would have more information about it online.

As far as my question about rigging it goes is regarding the order the line is fed through the blocks on the boom. Having never seen this type of mainsheet setup before, I wanted to make sure it's rigged right (see my picture posted earlier). The previous owner had several things rigged wrong, like the vang was up side down. Flipping it back the right way increased it from 4:1 to 5:1.

Sent from my SCH-I545 using Cruisers Sailing Forum mobile app
On your mainsheet, the most similar one on Harken's page is the 5:1 with a Dedicated Winch.

To rig your system a bit more efficiently: Start @ the pad eye, go over a single block mounted on the middle bail, then down to the upper sheave of the fiddle (double) block. From there, up to the single block on the aft pad eye, & down to the bottom sheave of the fiddle (double) block. Then, up to the single block mounted on the forward pad eye, & over to the deck block on the starboard side.

Can't promise it'll give you much, but what can it hurt to try. Getting rid of one of the singles on the boom, & swapping another for a fiddle with a becket would likely be your best bet (aside from lower friction blocks).

And FYI, it's still safe enough to slow the boom's crossing via the hand on the sheet technique, when the wind's light. Just do a controlled ease of the sheet through your hand, as the sail reaches centerline & starts to refill on the new tack.
I've done it plenty of times on Maxi's in light air. The technique doesn't change appreciably just because the boat/sail is bigger.
__________________

The Uncommon Thing, The Hard Thing, The Important Thing (in Life): Making Promises to Yourself, And Keeping Them.
UNCIVILIZED is offline   Reply With Quote
Old 29-12-2014, 07:27   #37
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
Re: New Blocks for Mainsheet on 45 Footer

It looks like to me, that someone broke the block that went on the boom bail that is currently a bowline.

I bet, that block was a becket block and they reversed the run on the traveler blocks to let it dead end at the boom, instead of running to the boom, to the traveler block, and back to the becket.

Just my .02... Most of the time stuff that doesn't look right, happens because someone jury rigged something, that works well enough that it didn't bother them enough to replace.

Zach
__________________
Zach is offline   Reply With Quote
Old 29-12-2014, 07:55   #38
Registered User
 
CaptNemoO2's Avatar

Join Date: Dec 2013
Location: Long Island
Boat: Beneteau Oceanis 510
Posts: 112
Re: New Blocks for Mainsheet on 45 Footer

Quote:
Originally Posted by UNCIVILIZED View Post
On your mainsheet, the most similar one on Harken's page is the 5:1 with a Dedicated Winch.

To rig your system a bit more efficiently: Start @ the pad eye, go over a single block mounted on the middle bail, then down to the upper sheave of the fiddle (double) block. From there, up to the single block on the aft pad eye, & down to the bottom sheave of the fiddle (double) block. Then, up to the single block mounted on the forward pad eye, & over to the deck block on the starboard side.

Can't promise it'll give you much, but what can it hurt to try. Getting rid of one of the singles on the boom, & swapping another for a fiddle with a becket would likely be your best bet (aside from lower friction blocks).

And FYI, it's still safe enough to slow the boom's crossing via the hand on the sheet technique, when the wind's light. Just do a controlled ease of the sheet through your hand, as the sail reaches centerline & starts to refill on the new tack.
I've done it plenty of times on Maxi's in light air. The technique doesn't change appreciably just because the boat/sail is bigger.
Thanks, I will try re rigging it the way you suggested. I do plan on replacing the blocks, but I will probably keep the three on the boom to keep the same load distribution. I need to replace them with ones that don't swivel, and would like to go to ball bearing blocks, probably Garhauer.

And for the jibe technique, I know it doesn't change, just bigger forces involved. But I'm more stupid than others so I do it on my dad's boat. On my boat, I'm usually at the helm, and I'm not going to tell a crewmember/guest to do that. I don't want them getting hurt, we're only out there for fun afterall. And we all know it's all fun and games until someone gets hurt...

Sent from my SCH-I545 using Cruisers Sailing Forum mobile app
__________________

__________________
CaptNemoO2 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
28 footer like new condition knottybuoyz Off Topic Forum 3 02-10-2014 20:43
General Info: a new Fountaine 50-footer? alexxx Fountaine Pajot 15 16-04-2013 06:24
For Sale: Harken Midrange Mainsheet Blocks sailjumanji Classifieds Archive 3 28-02-2013 11:18
TyeTec reef blocks vs. traditional blocks? svfinnishline Deck hardware: Rigging, Sails & Hoisting 1 16-02-2013 19:16
For Sale: like new sails for 26 footer bang shangalang Classifieds Archive 2 31-05-2012 21:05



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:02.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.