Tarp RL challenge

[opie]

I mocked it up using the limited resources I have at my hotel room. The chopsticks are the ridgeline and go around the tree (beer bottle). There is (a crude imitation) of a Prusik knot on the end of the line. The piece of paper is the toggle. I think it has to have two holes, so that the toggle does not turn and get pulled out. So, you simply wrap the toggle around the line and lock it between the two strands of the Prusik loop. Toggle is right where you need it, and no second loop required.

This works.... Toggle the prusiks together.

[opie]

One potential problem I see with having the toggle on the line is that the toggle might lock the rope against the tree, making it difficult to tighten. This may be an advantage of having the toggle on the Prusik loop.

With the 2 prusiks... it doesnt matter if its on the line or in the prusik.

[opie]

Thought of another variation this morning.

Set it up and it works very well. If I decide to drop the small Figure 9, this is the method I will use.



As shown, this method uses 3 Prussics and one toggle to secure the end of the RL. The other end is secured using the fixed eye and toggle as usual. Plus the 2 Prussics for the tarp attachment.

Prussic # 1 is positioned on the RL prior to wrapping the tree. Prussic #2 is positioned just after wrapping the tree. The RL and Prussic #3 are then passed through Prussic #1. Prussic #2 and #3 are then joined with the toggle. The RL is then pulled tight as indicated and Prussic #2 and/or #3 are slid on the RL until tight to hold the RL tight.

This method retains the mechanical advantage of the Figure 9 in pulling a tight RL.

I set up my tarp RL doing this this morning and it works well. The small Figure 9 is slightly easier since you wrap the Figure 9 and you have to pass the RL through Prussic #1 in this method, but that isn't difficult at all.

So this method will reduce the weight by replacing the small Figure 9, 4 g, with 2 Prussics, 1.2 g. The toggle can be picked up from the ground.

This method has another advantage over the Figure 9 in that it can be fabricated in the field from spare cord and a knife to cut the cord. A bowline knot to tie the fixed eye on one end, 5 short lengths for the 5 Prussics, and Zeppelin knots to form the Prussic loops. No hardware required other than the knife. If a splicing needle is available, then the fixed eye and Prussic loops could be spliced.

Tee, you can drop the third prusik.... Unless youre using it for leverage, which Im going to assume you are. pics coming for everyone.

[opie]

And... here we go... Nevermind the gray line in the pic....

[opie]

It would make more sense to have the toggle built into one of the prusiks. You could even use a #1 S biner here, or the method Eradicator suggested earlier in the thread.

Expounding on Eradicators method... a bead could be placed on one of the prusiks, then form the larkshead with the other and thats it.

[bazza2154]

OK.... I mocked this up....

Doesnt work. 2 prusiks are necessary.

Since the toggle can slide freely along the line..... The RL will never get tight.

2 prusiks are a must. But it does work.

Opie

Try two holes in the toggle on the main line this should not slip when under tension similar to a guy line tensioner loop the prusic around this and either slide the prussic up the line or the toggle.

[opie]

Opie

Try two holes in the toggle on the main line this should not slip when under tension similar to a guy line tensioner loop the prusic around this and either slide the prussic up the line or the toggle.

Bingo...



I didnt think it would hold because of the slipperiness of the line. I almost pulled my desk over trying it and it didn't slip.

[bazza2154]

Bingo...



I didnt think it would hold because of the slipperiness of the line. I almost pulled my desk over trying it and it didn't slip.

If at first you don't succeed try and try again this should also mean you dont have to go tight to the tree which makes tensioning easier.

[opie]

Yep.... No matter where the toggle is, it holds tight.

Im going to try to chamfer the holes a little so the cord isnt up against an abrupt edge. Hopefully it doesnt eat into its ability to hold.

Plus it give me a reason to mess with these nifty little dremel router bits I bought.

[opie]

This turned more into a brainstorming session than a turn in your idea.

Ill come up with a way to reward all those who offered input.. something like a discount at the whoopie store.