• Announcements

    • UnderDawg

      A Few Simple Rules   05/22/2017

      Sailing Anarchy is a very lightly moderated site. This is by design, to afford a more free atmosphere for discussion. There are plenty of sailing forums you can go to where swearing isn't allowed, confrontation is squelched and, and you can have a moderator finger-wag at you for your attitude. SA tries to avoid that and allow for more adult behavior without moderators editing your posts and whacking knuckles with rulers. We don't have a long list of published "thou shalt nots" either, and this is by design. Too many absolute rules paints us into too many corners. So check the Terms of Service - there IS language there about certain types of behavior that is not permitted. We interpret that lightly and permit a lot of latitude, but we DO reserve the right to take action when something is too extreme to tolerate (too racist, graphic, violent, misogynistic, etc.). Yes, that is subjective, but it allows us discretion. Avoiding a laundry list of rules allows for freedom; don't abuse it. However there ARE a few basic rules that will earn you a suspension, and apparently a brief refresher is in order. 1) Allegations of pedophilia - there is no tolerance for this. So if you make allegations, jokes, innuendo or suggestions about child molestation, child pornography, abuse or inappropriate behavior with minors etc. about someone on this board you will get a time out. This is pretty much automatic; this behavior can have real world effect and is not acceptable. Obviously the subject is not banned when discussion of it is apropos, e.g. talking about an item in the news for instance. But allegations or references directed at or about another poster is verboten. 2) Outing people - providing real world identifiable information about users on the forums who prefer to remain anonymous. Yes, some of us post with our real names - not a problem to use them. However many do NOT, and if you find out someone's name keep it to yourself, first or last. This also goes for other identifying information too - employer information etc. You don't need too many pieces of data to figure out who someone really is these days. Depending on severity you might get anything from a scolding to a suspension - so don't do it. I know it can be confusing sometimes for newcomers, as SA has been around almost twenty years and there are some people that throw their real names around and their current Display Name may not match the name they have out in the public. But if in doubt, you don't want to accidentally out some one so use caution, even if it's a personal friend of yours in real life. 3) Posting While Suspended - If you've earned a timeout (these are fairly rare and hard to get), please observe the suspension. If you create a new account (a "Sock Puppet") and return to the forums to post with it before your suspension is up you WILL get more time added to your original suspension and lose your Socks. This behavior may result a permanent ban, since it shows you have zero respect for the few rules we have and the moderating team that is tasked with supporting them. Check the Terms of Service you agreed to; they apply to the individual agreeing, not the account you created, so don't try to Sea Lawyer us if you get caught. Just don't do it. Those are the three that will almost certainly get you into some trouble. IF YOU SEE SOMEONE DO ONE OF THESE THINGS, please do the following: Refrain from quoting the offending text, it makes the thread cleanup a pain in the rear Press the Report button; it is by far the best way to notify Admins as we will get e-mails. Calling out for Admins in the middle of threads, sending us PM's, etc. - there is no guarantee we will get those in a timely fashion. There are multiple Moderators in multiple time zones around the world, and anyone one of us can handle the Report and all of us will be notified about it. But if you PM one Mod directly and he's off line, the problem will get dealt with much more slowly. Other behaviors that you might want to think twice before doing include: Intentionally disrupting threads and discussions repeatedly. Off topic/content free trolling in threads to disrupt dialog Stalking users around the forums with the intent to disrupt content and discussion Repeated posting of overly graphic or scatological porn content. There are plenty web sites for you to get your freak on, don't do it here. And a brief note to Newbies... No, we will not ban people or censor them for dropping F-bombs on you, using foul language, etc. so please don't report it when one of our members gives you a greeting you may find shocking. We do our best not to censor content here and playing swearword police is not in our job descriptions. Sailing Anarchy is more like a bar than a classroom, so handle it like you would meeting someone a little coarse - don't look for the teacher. Thanks.

Archived

This topic is now archived and is closed to further replies.

solosail

Dynex-Dux Rigging

19 posts in this topic

"Does that stuff still only come in SK75?"

 

I believe the Dux is additionally stretched and heat treated. Feels quite different (harder) than straight dyneema/spectra of what ever grade.

 

I would like to know what kind of terminations are being used. Colligo bottle screws?

Share this post


Link to post
Share on other sites

It absolutely is heat set, no question there.

 

The MedCup boats and AC45s all use Marlow D12MAX - they prestretch and heat set SK75, 78 and 90.

 

Wondering if Dynex had followed suit yet...

Share this post


Link to post
Share on other sites

It absolutely is heat set, no question there.

 

The MedCup boats and AC45s all use Marlow D12MAX - they prestretch and heat set SK75, 78 and 90.

 

Wondering if Dynex had followed suit yet...

 

We have been working with Hampidjan for awhile now to get SK-90 for the improved stretch as we feel it might be worth it in standing rigging. Not sure how it will cost out though as the other brand options are proving very expensive when compared to the workhorse, SK-75 from Hampidjan. We know the creep and stretch and it is easy to design with this. The lower stretch of SK-90 might be worth it for standing rigging but only if it is cost effective. We have built over 350 Colligo Dux standing rigging systems to date using SK-75 so it is more than adequate.

 

John Franta, Colligo Marine

Share this post


Link to post
Share on other sites

Cool. You do beautiful work, by the way. Wasn't casting aspersions on the propriety of 75 DUX for the application...was just wondering where on the curve Hampdjian was. Thanks.

Share this post


Link to post
Share on other sites

So John F and others,

 

why does Dynex Dux melt well with a hot knife, while spectra just kind fizzles open? Enquiring minds want to know.

 

I love my Colligo Dynex Dux rigging.

 

 

ed

Share this post


Link to post
Share on other sites

caps shrouds and forestay in dux. Diamonds were just replaced in wire.

 

new bowsprit up line and whiskers too.

 

post-13343-091000000 1305156927_thumb.jpg

 

 

ed

Share this post


Link to post
Share on other sites

So John F and others,

 

why does Dynex Dux melt well with a hot knife, while spectra just kind fizzles open? Enquiring minds want to know.

 

I love my Colligo Dynex Dux rigging.

 

 

ed

 

 

Hi Ed, When UHMWPE line is made it is spun, which makes it soft and pliable like amsteel or amsteel blue. When the line is heat stretched it basically work hardens the material which closes the gaps between the fibers and makes it less soft. It starts to become more like plastic than rope. This is why it is easier to cut with a hot knife than spun Dyneema.

 

John Franta, Colligo Marine.

Share this post


Link to post
Share on other sites

Appears that Jay's rigging is PBO with Dyneema covering and dyneema lashing, not Dux rigging.

Share this post


Link to post
Share on other sites

I rigged my mini with Marlow 5mm sk79 MAX (heat treated) spliced it up myself then left it tensioned on a turfa winch overnight.

 

It took a few weeks to bead in and became nearly 6 inches longer per shroud!! But it seems to have stopped now.

All the standing rigging cost under £500. Cheaper than wire and half the weight!.

 

The boat just did 19.6kn so its not like shes not being pushed.

 

Share this post


Link to post
Share on other sites

I rigged my mini with Marlow 5mm sk79 MAX (heat treated) spliced it up myself then left it tensioned on a turfa winch overnight.

 

It took a few weeks to bead in and became nearly 6 inches longer per shroud!! But it seems to have stopped now.

All the standing rigging cost under £500. Cheaper than wire and half the weight!.

 

The boat just did 19.6kn so its not like shes not being pushed.

 

 

Some of the Marlow line we tested still had some constructional stretch and that is probably what you have experienced if the load was maintained thruout the stretch period. On the mini's that we have done we have used 7 mm as with 5 you need to keep the load pretension below about 500 lbs to not get any significant creep. With the 5 mm I would loosen the shrouds when not sailing as this would eliminate the creep issue.

 

See the pic of the Open 60 we rigged with 10,000 lbs of pretension (mast ram) on the uppers.

 

post-21646-060666900 1310475305_thumb.jpg

 

John Franta, Colligo Marine

Share this post


Link to post
Share on other sites

ThanksJohn that’s interesting.

 

500lbs sounds very low? I haven’t noticed any creep since the initial stretch althoughI was intending to change the cap-shroud for a bigger diameter just to make mefeel a little less on the edge.

 

 

What do you calculate the lowest break strain is for a mini rig? or is it justthe creep issue that dictates rigging size?

 

I think my BS is 3750kg per line, out of my head I think I remember my staticmax load was around 1000kg. Sound about right to you?

 

sorry about the metric.

 

Cheers

 

Jake

 

Share this post


Link to post
Share on other sites

ThanksJohn that’s interesting.

 

500lbs sounds very low? I haven’t noticed any creep since the initial stretch althoughI was intending to change the cap-shroud for a bigger diameter just to make mefeel a little less on the edge.

 

 

What do you calculate the lowest break strain is for a mini rig? or is it justthe creep issue that dictates rigging size?

 

I think my BS is 3750kg per line, out of my head I think I remember my staticmax load was around 1000kg. Sound about right to you?

 

sorry about the metric.

 

Cheers

 

Jake

 

We always size Dyneema for Stretch and Creep and it is always at least 2 x stronger than equivalent 1x19 wire. I would need to look up our loads from the previous builds but 1000 kg sound about right. We will have loos gauge calibrations for Dux on the website in a couple of days and these should work relatively well for other heat stretched dyneema products so you could check your tension.

 

The 500 lb limit is for about 0.1 inches of creep per year at static loading (pretension), it could tolerate more but creep is exponential with load so it goes up fast with slight load increases.

 

John Franta, Colligo Marine.

Share this post


Link to post
Share on other sites