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When "adjustable" side of the loop is longer than the "fixed" side, then the fixed side is providing the suspension just as usual. As the adjustable side becomes shorter the whole thing is more like a UCR than a whoopie sling. Probably this would work when the whoopie loop is long because there would not be much lateral pull by the short side. But the loop is short because his ends are up against a hammock frame that no doubt is no longer than it needs to be.
I built the sling as indicated on the first page of this epic thread.
As you can see in the first picture, the fixed end is tied to the Hennessy. This is typically where you put a fixed eye that some have been attaching to their hammocks using a Larks Head. I simply tied it to the Hammock following the original Hennessy knot. The adjustable loop is to the left after a 10 inch burry which, when built, shortened itself to about 8.5". The free end is coiled up to the lower right of the Y junction that showed the unweaving from my previous photos. The junction in question is proximal.
The second photo shows the hammock on its stand (take note of the hamster rolling around). Because of the metal construction with no top brace, it flexes inward quite a bit when I put weight on the hammock. I recently figured out that I can pre-tension the stand with a rope tied across the top and pulled tight with a trucker's hitch. I only thought to do it after I noticed the unweaving and now it shouldn't be an issue.
The third photo shows the junction in question with the free end hanging down and to the right. When I pulled the suspension tight to get rid of the anticipated sag, I pulled the free end hard and perpendicular to the support rope running left to right. In this photo, I would have pulled it down. This tended to scrunch the burry immediately to the left of the junction, compressing it and allowing the section to the right to unweave.
Now that I understand the cause of my issues, I'm still unsure of your argument that this is not the typical configuration for a whoopie sling. How does shortening the adjustable loop (to the left) affect the action of the constrictor? Since the loop is sliding over a toggle at the the tree hugger, the tension should be shared equally between both halves of the loop, at least through the burry. Once you exit the bury, the tension is taken exclusively by the rope end that is tied to the hammock.
This is, as far as I can tell, analogous to how it is used on a tree. Granted, the fixed eye is typically threaded through the adjustable loop, but at one point during use, the load is being carried by the single strand leading from the fixed eye to the bury junction.
As always, thanks.
emphasis mine.The bury is to the left, eventually leading to the adjustable loop .
I'm on track now, explanations about twists in bury etc much more likely...
So this is basically the lightest suspension system there is correct?
I wonder if the rope has any abrasian qualities on the hammock fabric where it wraps around the fabric ball.
Last edited by FreeTheWeasel; 08-01-2009 at 12:26. Reason: I used my real name! Gasp! (Pssst . . . his name is Geoff)
My suspicion is that the lightest suspension system sold commercially is the cord + tree hugger option with the Blackbird. There the "excess beyond minimal" is a small light (0.2 oz on mine) tri-ring to which the suspension cord is tied with a slipped buntline hitch.
Assuming your question is really "This is a really light suspension, right?" the answer is yes. I like it quite a lot for that reason and the easy adjustability; I have converted three of my hammocks to use it.
The rope at the hammock would only abraid it if there is movement. With a lark's head where the cord goes through twice and is cinched down, there's not movement.
Actually, this is probably not the lightest suspension system. A plain rope and knot is as light as you can get. I'm not sure which is lighter a whoopie sling suspension with double the rope or a single line suspension with a lightweight toggle. I'm playing with both: the whoopie sling on my hammock and the Marlin spike toggle on my daughter's.
Both suspensions are so light, convenience is going to be the determining factor when I finally choose.
The AmsteelBlue I am using seems to be less abrasive than the stock Hennessy rope. I expect less wear now that I've switched; although, I didn't see any evidence of wear when I removed the original cord. The end that ties to the hammock (at least on the Hennessy) is fairly constrained and not likely to move once it has snugged down.
Are most of you using a whoppie sling with a 5 or 6 foot hugger or are most of you not using a hugger at all?