SparTalk
EDUCATION CATALOG RIGGING CONSULTATION HOME CONTACT US

Go Back   SparTalk > SparTalk
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 08-14-2016, 10:14 AM
John Reeves John Reeves is offline
Junior Member
 
Join Date: Nov 2014
Posts: 1
Default Spreaders and double constrictors

Hi Brion

When I tie double constrictors on the shrouds to try and fix the spreader tips vertically they rotate down the 1x19 shroud. Am I missing something?

Thanks

John
Reply With Quote
  #2  
Old 08-16-2016, 07:01 AM
Ian McColgin Ian McColgin is offline
Senior Member
 
Join Date: Jun 2005
Location: Hyannis, MA
Posts: 368
Default

In my experience a constrictor knot, whether with marling or wire and even if snugged up with leverage from opposing pliers, gets only limited tightness. If you don't use that lovely tool Brion advocates, use a quality stainless or monel siezing wire and a good steel tool (I use the eye in my Myerchin marling spike) to make the wraps really tight. They won't move then.

G'luck
Reply With Quote
  #3  
Old 08-20-2016, 01:02 PM
Brion Toss Brion Toss is offline
Moderator
 
Join Date: Jun 2005
Posts: 1,180
Default Constrictors

Hi again,
The Clamptite tool is indeed lovely, but 3 double constrictors, pulled utterly tight, should stay put, if they are right up next to each other. We have tested ours by jumping up and down on the spreader tips.
As for having no constraints at all at the spreaders, it is not only possible but likely that the leeward shroud will escape. Vertical fixity might be less of a problem, given stout enough support at the inboard end.
Fair leads,
Brion Toss
Reply With Quote
Reply


Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -7. The time now is 01:24 PM.


Powered by vBulletin® Version 3.6.7
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.