Cruisers Forum
 

Go Back   Cruisers & Sailing Forums > Search Forums
Reload this Page Search Results
Cruiser Wiki Click Here to Login
Register Vendors FAQ Community Calendar Today's Posts Log in

Page 1 of 2 1 2
Showing results 1 to 25 of 47
Search took 0.00 seconds. Search: Posts Made By: thinwater
Forum: Deck hardware: Rigging, Sails & Hoisting 18-01-2014, 15:42
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I'm an idiot.

I knew this about thread. All of you knew this. But in case you don't and in case anything I posted was based upon whipping twine numbers...

Thread companies all do their own...
Forum: Deck hardware: Rigging, Sails & Hoisting 17-01-2014, 20:13
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Actually, I am starting some long-term testing of both splices and UV/chafe protection options. Liquids like Rope-dip and Maxijacket will be one part, as well as physical coverings like tape,...
Forum: Deck hardware: Rigging, Sails & Hoisting 17-01-2014, 18:06
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

After thinking through the challenges stretch caused for webbing, I decided to further investgate stitching of nylon rope ,specifically dynamic climbing rope. Designed to elongate nearly 100% before...
Forum: Deck hardware: Rigging, Sails & Hoisting 16-01-2014, 13:48
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

^^ Drew
Forum: Deck hardware: Rigging, Sails & Hoisting 16-01-2014, 11:05
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

What is really disturbing about bad stitiching, is they could have reached a certain, no question mark 75% (3000 pounds, or nearly 3x as strong) with an overhand loop! I've probably taken over 1,000...
Forum: Deck hardware: Rigging, Sails & Hoisting 16-01-2014, 09:37
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

How scary is 1200 pounds breaking?

First, let's assume that was a 1-time, day one value. Let's use 800 pounds as more realistic, after some use and sun. Also, ESTAR is not the worst seamstress;)....
Forum: Deck hardware: Rigging, Sails & Hoisting 16-01-2014, 08:37
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Hmmm.

The tether instructions and video are with 2" webbing. Maybe, as the stretch is 1/2 and the width is double. He does about 12 stitiches each pass, and goes over it ~ 4 times. With 50...
Forum: Deck hardware: Rigging, Sails & Hoisting 16-01-2014, 07:50
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I bought a different product from these guys once (industrial). Excelent quality. See P022.
Polyester Webbing (https://www.calwebmills.com/polyester-webbing-4.html)

Also these folks. They sell by...
Forum: Deck hardware: Rigging, Sails & Hoisting 15-01-2014, 15:19
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Bear in mind that plain stitching with...


1/8- to 3/16-inch spacing
#4 whipping twine doubled
14 full stitiches in a 1-inch length

... reached 93% breaking strength. Since no one...
Forum: Deck hardware: Rigging, Sails & Hoisting 15-01-2014, 13:41
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I don't think you WANT to separate the stitch pattern testihg from the material, just as knot eff is material dependant. The value of what you are doing is in realism.
Forum: Deck hardware: Rigging, Sails & Hoisting 15-01-2014, 13:05
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Yes, I understand.

Failure. Too much stress in too small an area. It simply pulled through the webbing at 15% lower load. A good idea that doesn't seem to apply to tubular webbing. 2 trials. I'm a...
Forum: Deck hardware: Rigging, Sails & Hoisting 15-01-2014, 12:31
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

SL, I'm on it!
Forum: Deck hardware: Rigging, Sails & Hoisting 15-01-2014, 11:51
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Always doubled, visible in the photos.

I get significantly higher efficiencies at lower load factors and sewing line, but not with webbing near the limit of the webbing. High thread efficiency...
Forum: Deck hardware: Rigging, Sails & Hoisting 15-01-2014, 11:27
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Regarding hand stitching webbing, the results look a little different, but in many ways, perhaps more repeatable. below is a dead-average result. strength is 92% of webbing strength, with a total...
Forum: Deck hardware: Rigging, Sails & Hoisting 14-01-2014, 09:38
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I typed a long response, then the damn website logged me out and lost it. Arg. A shorter version.


Assume:

A splice between 2 long bits of webbing (not an eye).
25% stretch at high load.
...
Forum: Deck hardware: Rigging, Sails & Hoisting 12-01-2014, 20:38
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

^^ Ya think?

Look at stitching in the failed tethers in this study and some correlation to what you have learned seems obvious.

...
Forum: Deck hardware: Rigging, Sails & Hoisting 12-01-2014, 15:08
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Edit (the edit time frame expired). When I mentioned "over 80#" I was thinking about sewing 1/2" rope, not webbing. In fact, for 1/4" to 3/8" rope, doubled #4 is better and gives less load...
Forum: Deck hardware: Rigging, Sails & Hoisting 12-01-2014, 14:28
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I also agree with this. Everything I have seen points to transverse stitching. Unfortunatly, this is the relm of bar tacking, not standard machine stitch, in part because the machine barely gets...
Forum: Deck hardware: Rigging, Sails & Hoisting 12-01-2014, 14:26
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I'm no expert, but I've learned a few things from hand sewing and breaking things, like you trials.

Does it break with a sharp "bang," like a line failure? That is my normal experience for good...
Forum: Deck hardware: Rigging, Sails & Hoisting 11-01-2014, 12:46
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I'm not confused any longer. All makes sense.
Forum: Deck hardware: Rigging, Sails & Hoisting 10-01-2014, 11:38
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

I've got to admit it, I'm completely confused. I'm sure your data is good, but I'm not understanding the comments.

100-200 psi. It would take 2-3 feet of 1 inch webbing, assuming no deterioration...
Forum: Deck hardware: Rigging, Sails & Hoisting 08-01-2014, 09:55
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Webbing carrying load web-to-web friction, cause by thread induced compression.

Some, but I think we are jumping to a conclusions without calculation or testing.

Friction from pre-tension. If...
Forum: Deck hardware: Rigging, Sails & Hoisting 08-01-2014, 09:25
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

^^ Yes, testing used line is a bugger, but in many ways, it is the only thing that matters, since it will fail whe used. The bit I have been working with is now gone and the next bit will be...
Forum: Deck hardware: Rigging, Sails & Hoisting 08-01-2014, 07:58
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Though I was surprised, only so much. PS did some testing of old docklines that showed great strength loss, enough that core damage had to contribute. Perhaps there is some other mecanism (internal...
Forum: Deck hardware: Rigging, Sails & Hoisting 08-01-2014, 06:21
Replies: 254
Views: 29,126
Posted By thinwater
Re: Load Testing Results

Testing reaving splices.

Last night I tested some reaving splices (cover only) in old line; I got to thinking, if the cover is shot, how weak are they? At the same time I thought, in a...
Showing results 1 to 25 of 47
Page 1 of 2 1 2

 
Forum Jump


All times are GMT -7. The time now is 02:43.

Contact Us - Cruisers & Sailing Forums - Sitemap - Community Rules - Terms of Service - Privacy - Accessibility - Top

Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
close

Privacy Guaranteed - your email is never shared with anyone, opt out any time.


ShowCase vBulletin Plugins by Drive Thru Online, Inc.