Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 03-05-2011, 09:59   #1
Registered User

Join Date: Jul 2010
Location: lavallette New Jersey
Boat: Santana 2023 - Impulsive II
Posts: 174
Tension

Nowhere in my manual does it give me any specs on how tight the rigging should be. A friend of mine who races tuned them up to 40lbs upper and i want to say 15 lower shroud. I have a Santana 2023 with swept shrouds and no backstay. The mast is straight and sails well, i just want to make sure im not putting any undue stress on the rigging or deck. Thanks in advance
__________________

__________________
E.L.Green is offline   Reply With Quote
Old 03-05-2011, 10:17   #2
Registered User

Join Date: Jul 2010
Location: lavallette New Jersey
Boat: Santana 2023 - Impulsive II
Posts: 174
Re: tension

also it is 1x19 rigging
__________________

__________________
E.L.Green is offline   Reply With Quote
Old 03-05-2011, 10:27   #3
Registered User
 
wolfaroo's Avatar

Join Date: Mar 2010
Location: UK South Coast
Boat: Unknown MFV 60ft
Posts: 111
Re: Tension

an expert rigger on the south coast of england who has been doing it for many years always tightens until he is just about able to pull each shroud/stay 1 inch with 1 finger (perpendicular to stay)...

mind you he obviously had the knack for it! But still gives a good quick guide.
__________________
"It is good to have an end to journey towards; but it is the journey that matters in the end."
Ursula Le Guin
wolfaroo is offline   Reply With Quote
Old 03-05-2011, 10:28   #4
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: tension

That's interesting. I spent all day yesterday adjusting my rigging for the first time. An issue with the mast step had caused it to slacken over time, so I executed a temporary fix on the step and started researching rig tuning online.

Using advice about tension based on wire size, not boat model, I began adjusting to achieve a tension of 1000lbs on the uppers, 850 on the lowers (fronts slightly more and rears slightly less), 1200 the backstay, and 1400 on the forestay. I ended up at about 90% of these numbers because some turnbuckles were all in because the mast has shortened itself on the step due to corrosion.

Feels good to me compared to other masthead rig sloops at the dock. I asked permission to put my gauge another boat and it showed similar figures.

Why are your figures so low? Have I made a mistake?

Haven't been out yet after the adjustment.
__________________
four winds is offline   Reply With Quote
Old 03-05-2011, 10:30   #5
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Tension

wolfaroo, I like to develop a feel for adjustments as well, but I'm learning here.

However, the one inch displacement roughly applies to my results unless I really put my weight into it. Using my arm only and flexing moderately I think I'm in the ballpark.

Certainly much better than it was.

This is from a pdf that I read yesterday.

__________________
four winds is offline   Reply With Quote
Old 04-05-2011, 09:15   #6
Registered User

Join Date: Jul 2010
Location: lavallette New Jersey
Boat: Santana 2023 - Impulsive II
Posts: 174
Re: Tension

he used a tool and pulled laterally, my boat is only 23 ft
__________________
E.L.Green is offline   Reply With Quote
Old 04-05-2011, 09:27   #7
Registered User

Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 3,538
Re: Tension

some light reading here - </title> <link rel="STYLESHEET" type="text/css" href="_styles/selden.css"> <script language="javascript"> var openwindow = null; function showLoginForm() { openwindow = document.getElementById("loginForm"); openwindow.style.display = "block"; } funct
__________________
conachair is offline   Reply With Quote
Old 05-05-2011, 09:15   #8
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Tension

Quote:
Originally Posted by E.L.Green View Post
he used a tool and pulled laterally, my boat is only 23 ft
I suspected this before, but I believe the numbers 40 and 15 are the tension gauge scale reference numbers. Which are then used to convert to tension in pounds based on wire size.

On my Loos Model B the conversion chart is on the back of the gauge, and as an example, 40 on a 1/4 inch wire is 1060 lbs. My chart is unreadable at the lower numbers due to wear.

Could be rigging that is at only 40 lbs. on some boats, I'm not experienced enough to know. But having taught statics at university level I don't see why there would be such a wide diversity of tensions from boat to boat.
__________________
four winds is offline   Reply With Quote
Old 09-05-2011, 21:31   #9
Registered User

Join Date: Jul 2010
Location: lavallette New Jersey
Boat: Santana 2023 - Impulsive II
Posts: 174
Re: Tension

so its at 35 upper which equals 360 lbs and 10 lower which is about 150. i called WD Schock and NO ONE can tell me the specs for the rigging so i guess for now this is what it will stay at. thank you for the info everyone!
__________________

__________________
E.L.Green 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
Jackline tension SvenG Seamanship & Boat Handling 28 19-03-2011 17:53
Backstay Tension Cattywampus Deck hardware: Rigging, Sails & Hoisting 28 16-03-2011 19:36
How Much Tension on Cables kcmarcet Deck hardware: Rigging, Sails & Hoisting 8 05-09-2009 04:58
Do my shrouds have too little tension? theonecalledtom Deck hardware: Rigging, Sails & Hoisting 6 06-10-2008 20:57
Rig Tension bluewater Construction, Maintenance & Refit 9 27-08-2007 19:53



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:10.


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.