• 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.

neuronz

stainless steel pins

13 posts in this topic

here is one for the carbon/composite gurus

 

our whole rigging is connected to the mast with eye terminals and stainless steel pins.

Would it be possible to replace them with carbon rods?

can carbon cope with the shear stresses?

Share this post


Link to post
Share on other sites

We just made up 4 barrel pins out of 13-8 stainless steel; probably could knock 50% of the diameter out of them, compared to 316 stainless, especially after they are hardened. A bit pricey though.

 

Bam Miller

post-205-022330000 1330538263_thumb.jpg

Share this post


Link to post
Share on other sites

The short answer would be no, carbon's high properties are in tension and compression. The pin would be relatively large compared to it's stainless counterpart.

 

Thanks for the link. Pretty useful for quick estimations.

But IMO one important information is missing to evaluate this. All the data regarding the shear refer to the fabric plane (so IMO the given shear strength is a result of the resin used, not so much the fibre). For a UD carbon pin the strain would be vertical to the fibres. Anyone have data for this loadcase?

Share this post


Link to post
Share on other sites

We just made up 4 barrel pins out of 13-8 stainless steel; probably could knock 50% of the diameter out of them, compared to 316 stainless, especially after they are hardened. A bit pricey though.

 

Bam Miller

post-205-022330000 1330538263_thumb.jpg

 

The diameter would have to remain constant to use the old rigging. I just thought this would be an easy way to save weight aloft as UD rods are pretty cheap (~20$/m for 8mm).

Share this post


Link to post
Share on other sites

The short answer would be no, carbon's high properties are in tension and compression. The pin would be relatively large compared to it's stainless counterpart.

 

Thanks for the link. Pretty useful for quick estimations.

But IMO one important information is missing to evaluate this. All the data regarding the shear refer to the fabric plane (so IMO the given shear strength is a result of the resin used, not so much the fibre). For a UD carbon pin the strain would be vertical to the fibres. Anyone have data for this loadcase?

 

Shear is still shear though.

Share this post


Link to post
Share on other sites

Look at it this way. I can shear of a piece of 8mm carbon rod with a wood chisel and a light blow with a hammer. try this with a 8mm stainless steel pin. carbon pins are just plastic with the carbon as reinforcement and the shear strength of either does not change when you cover the carbon with the plastic..if you want to save weight then go to titanium. in racing, he who spends the most money wins.

Share this post


Link to post
Share on other sites

here is one for the carbon/composite gurus

 

our whole rigging is connected to the mast with eye terminals and stainless steel pins.

Would it be possible to replace them with carbon rods?

can carbon cope with the shear stresses?

 

No, this is a bad idea.

How is that for succinct? :rolleyes:

Share this post


Link to post
Share on other sites

Sure you can use the carbon pins. Just make sure the insurance is paid in advance and have lots of video cameras around the first time you go sailing. Make sure to post the video here. We will enjoy the show.

PS You might want to issue hard hats to the crew and be more than one mast length to weather of any other boats in the area.

Share this post


Link to post
Share on other sites

in racing, he who spends the most money wins.

 

Does money spent on beer count?

Share this post


Link to post
Share on other sites

Didn't some boating magazine in theuk use fiberglass rod as rigging pins to try and break the rig and didn't they in the end have to use a lot smaller fiberglass pins in the end to make it fall over? There was a video of it.

 

I would not recommend it though!

Share this post


Link to post
Share on other sites