Wait a minute you think 18kN is half the strength of 12 kN 7mm cord? On the site you posted Beal Jammie has a breaking strength of 1800 daN which converts to 18 kN which is over 1300 lbs STRONGER than 7mm Sterling cord. Unless I am missing something
I don’t like technora either. It has great heat resistance and abrasion resistance. But it absorbs water, it does not stretch which means even though it’s tensile strength is excellent, it’s dynamic loading capabilities are not. Add in the fact that of all synthetic rope material it is one of if not the worst at handling UV degradation, the only true positive I see for technora is the heat resistance. I don’t plan on constantly adjusting while under load, which would be burning my bridge’s friction hitch. so that heat resistance doesn’t mean much to me.
Yea heat vs UV rays. When I think of technora it’s strong and light (but not as strong or light as amsteel) it has amazing heat resistance but it absorbs water almost as badly as nylon. At least amsteel doesn’t absorb water and handles UV better than any other synthetic rope material. Also when I look at it from dynamic loading capabilities, neither technora or amsteel stretch, so they are not ideal, it’s the reason why I tell guys not to use 1/8” amsteel on their bridges use 3/16 or larger. You want the extra strength to offset the loss from lack of stretch in a dynamic event. Truly the industry has gotten way from using 7/16” climbing polyester or polyester/nylon ropes with 8 or 9mm friction hitches. It was cheaper to use those types of ropes for tethers and bridges and truthfully outside of the bulk, they were better. Safer, easier to adjust… just not convenient due to bulk and weight savings. I love my amsteel, but I have zero quarrels using 11mm climbing line either.
Chemicals have minimal effect on amsteel compared to other rope materials the exception being bleach. Bleach can effect it but even after 6 months submersion, amsteel kept 91% of its original strength. It is an amazing synthetic fiber
I had a Amstel bridge on my Cruzr Archon all season and I walk through a ton of burrs and beggars lice and never had one on my bridge!
. Only thing I noticed with Amstel is it’s hard to loosen the prusik even with a tender. Almost always need 2 hand to loosen or work hard with 1 hand. Everyone I’m Sure has a different opinion! Good luck.Since you are using dynamic rope, have you considered using a dynamic friction hitch as well? Bluewater makes some if 6.5mm which would be perfect on 8.9mm rope, you can buy presewn for prusiks or I believe a small reel. They do not sell it by the foot though
www.bluewaterropes.com
My Phantom has an Amsteel bridge and Prussic. We use it for prepping trees. My Transformer is what I hunt out of. It has Rech Tech Bridge and Sterling. My Platform has a rope mod and is set up like the bridge on my Transformer. Last spring every time we came back from prepping trees, that Amsteel bridge was covered in burrs, especially the Prussic. I hunted all season w/ my Transformer and platform. There were hardly any burrs on the saddle, the bridge or the platform rope. Also there were 2 of us. Mu hunting partner hardly had any either. Maybe we have different kinda hitchhikers out here but where I hunt they get on everything. I bring them into the house all season much to my wife's dislike. My wife calls it burr season not hunting season!I had a Amstel bridge on my Cruzr Archon all season and I walk through a ton of burrs and beggars lice and never had one on my bridge!
I'm thinking of replacing my bridge with something like this. How much of each rope did you need to make this setup?
