Polyester is a more static material the polyamide, an 8 to 8 pull test will favor the more dynamic polyamide due to the knot weakening the polyester by a larger percentage. Hence the use of bollards.
Brilliant its great to get some peace of mind from your tests . I climb 200ft+ mountain ash in Australia as a rec climber and have started leaving my Drenaline rope for weeks at a time anchored in a cinch with an alpine butterfly so i don't have to constantly re anchor it which is hard work at that height . I check it with binoculars from ground level first to make sure the cockatoos haven't chewed on it and then start my ascent . My thinking is that a few months of rain and sun won't compromise the rope after watching video's like yours 👍
sorry to be off topic but does anyone know of a tool to get back into an instagram account?? I somehow forgot my account password. I would love any help you can give me
@Arlo Nathan thanks for your reply. I found the site through google and im trying it out now. Looks like it's gonna take a while so I will reply here later when my account password hopefully is recovered.
Sunlight is actually the most comprimising factor for most soft goods and plastics. The lack of sunlight is a big part of why ropes tend to do really well underground.
You can get clear shrink tube and use a ballpoint pen to write on a piece of plastic (example "Beall Industrie 10.5 Dec 2020") and slide that under the shrink tubing on the end, then move flame of butane cigarette lighter over the end, all done in-situ. I've never seen anyone else do it. It's so easy to do and the shrink tube is cheap and easy to get.
Hi, i am a caver. We are also cleaning a windows on buildings. With a same ropes. Do you know maybe, can chemicals from windows cleaning liquid damage a rope ? Chemicals like windex or other similar stuff. It's mixed with water. Ropes are sometimes very wet from that.
There have been tests with numerous chemicals on rope, and I think even other textile gear... nothing had an appreciable effect except acid. I don't remember acetone....
Fascinating videos you're producing here!
Thanks Judy!
That's a lot of work! Thank you very much. Empirical data is so much scarse over the Internet.
All of the aged ropes were still 100% bomber
Polyester is a more static material the polyamide, an 8 to 8 pull test will favor the more dynamic polyamide due to the knot weakening the polyester by a larger percentage.
Hence the use of bollards.
helpful video, thx a lot
Brilliant its great to get some peace of mind from your tests .
I climb 200ft+ mountain ash in Australia as a rec climber and have started leaving my Drenaline rope for weeks at a time anchored in a cinch with an alpine butterfly so i don't have to constantly re anchor it which is hard work at that height .
I check it with binoculars from ground level first to make sure the cockatoos haven't chewed on it and then start my ascent .
My thinking is that a few months of rain and sun won't compromise the rope after watching video's like yours 👍
sorry to be off topic but does anyone know of a tool to get back into an instagram account??
I somehow forgot my account password. I would love any help you can give me
@Arlo Nathan thanks for your reply. I found the site through google and im trying it out now.
Looks like it's gonna take a while so I will reply here later when my account password hopefully is recovered.
@Arlo Nathan It did the trick and I now got access to my account again. Im so happy!
Thanks so much you really help me out :D
@Ignacio Bentley No problem :)
Sunlight is actually the most comprimising factor for most soft goods and plastics. The lack of sunlight is a big part of why ropes tend to do really well underground.
Strong Work. I have a pile of PEP rope that’s over 25yo. I’ve been thinking of doing some similar testing.
You can get clear shrink tube and use a ballpoint pen to write on a piece of plastic (example "Beall Industrie 10.5 Dec 2020") and slide that under the shrink tubing on the end, then move flame of butane cigarette lighter over the end, all done in-situ. I've never seen anyone else do it. It's so easy to do and the shrink tube is cheap and easy to get.
Like in this video? ua-cam.com/video/VoRNjvPxAEQ/v-deo.html
Hi Derek. What kind of caves are these from? Do you know if they were exposed to calcification or any other cave impacts?
Thank you!
All came from typical limestone caves. Not exposed to calcite deposition, i.e. not in drippy areas.
That is a horrible sound. LOL
Hi, i am a caver. We are also cleaning a windows on buildings. With a same ropes. Do you know maybe, can chemicals from windows cleaning liquid damage a rope ? Chemicals like windex or other similar stuff. It's mixed with water. Ropes are sometimes very wet from that.
There have been tests with numerous chemicals on rope, and I think even other textile gear... nothing had an appreciable effect except acid. I don't remember acetone....
10/10 would whip
Breaking point?
Yeah but what are the kn breaking points?
Sam Cook The vertical axes on the graphs are breaking strength in kN. Multiply to 225 to get lbf.
@@DerekBristol sweet thanks!