/diy/ - Do It Yourself

>>284277
I would feel better about a rope spun from yellow spider silk:

http://www.ecouterre.com/worlds-largest-cape-made-from-golden-spider-silk-goes-on-display/

>>284285
>OP
Unfortunately, this would be very expensive.

6mm is quite thin. Firefighter escape line is usually 7.5mm and is rated for single-use escape from immediate life threatening situations only. That's the minimum I'd want to trust my life to, and I wouldn't to it on a regular basis.

If you manage to find 6mm kevlar blend rope that's designed for life safety applications, you also have to consider what sort of friction device you'll use. Equipment designed for larger ropes will ensure a very rapid descent if used on 6mm line.

Also read this article about escape ropes. Be sure to read the section on dynamic loading, as that's probably going to be the biggest issue with thin escape line.

>>284334
>OP
>sarcasm
Intetesting article.

>>284334
I'm using a figure 8 decender rated for, "up to 8mm double or single"

>>284337
>>284334
Fuck, forgot to post link: http://www.fireengineering.com/articles/print/volume-160/issue-7/features/escape-rope-performance-wo
rking-at-elevated-temperatures-and-under-dynamic-loads.html

>>284338
Can you post a pic? I've never heard of a figure 8 rated for "up to" 8mm. Perhaps you mean at least 8mm? There are a couple micro-8s designed for 7.5-9mm rope, but I doubt that's what you have.

>>284343
Haven't bought it yet, but here's the model i'm referring to.

can't post link, system keeps telling me my post is spam, but it's called "Escape 8"

>how does /diy/ feel
Knot good. (ha-ha! is good pun, da?)

I wouldn't feel good about it because it doesn't stretch like a dynamic nylon climbing rope.
If you're clipped or tied into it and you have a fall of even a few feet it will mean trouble.

Kevlar is also awful for tying knots in. I've tied knots with most of the usual synthetics, that includes UHMWPE spectra and dyneema, and kevlar. Spectra and dyneema are difficult because they are so slippery, but kevlar was worse. The knots were hard to dress because they tended to self-loosen when slack.

>>284334
>>284403
>OP
How about 7.5mm Technora rope?

>>284414
Says low stretch, which is the same problem kevlar has.

>>284438
Trying to keep the rope as thin and lite as possible, any suggestions?

>>284442
>any suggestions?

Yes, use a heavier thicker rope designed specifically for your needs. There are reasons they are designed that way. If there is a new material that can do it with lighter and thinner design then go for it, but the public doesn't know about it yet if it exists. You safety comes first, so tried and true methods/materials should be your first choice.

If you do wish to experiment, do it with a spotter and with a proper safe landing space should you indeed fall.

>>284403
>i'm afrayed knot

this rope has core wich is digerent from this yellow stuff you see, it leaks while trying to pull it, I use it to make fire-show

>>284351
The SMC escape 8s are designed for 7.5-9mm rope and would not be adequate on 6mm cord. Best case scenario you would have a very rapid rappel, worst case it overheats and melts through your rope. I can think of a few workarounds, but none are a good idea for someone with no technical climbing background.

>>284403
Low stretch isn't necessarily a problem if used appropriately, i.g. static rope for rappelling and ascending, but your advice is reasonable given OP seems intent on using this stuff inappropriately.

>>284442
Yes, use the thing that was designed specifically for that purpose: firefighter escape line. You can even buy it in kits with a friction device and a pouch that attaches directly to an escape belt. Don't reinvent the wheel.

>>284452

>>284766
>firefighter escape line
7.5mm Technora rope and 8mm kevlar rope then. Thanks.