Whoopie Sling Suspension

[Frawg]

You scientists are too funny! Good engineers know that the chafe inside the constriction is insignificant, or no more significant than the rest of the normal wear and tear. Chafe is accelerated wear and tear, beyond the norm.

Oh....

... never mind!

[GrizzlyAdams]

You scientists are too funny! Good engineers know that the chafe inside the constriction is insignificant, or no more significant than the rest of the normal wear and tear. Chafe is accelerated wear and tear, beyond the norm.

party pooper
we turn to the made up problems after we sort out the real ones!

actually, knowing my breed too well, we turn to the made-up problems because we can solve them---particularly when we can solve them elegantly---not because the solutions may have any evident application.

Grizz

[TiredFeet]

I've been using TeeDee's SLS and MSLS now for many, many months.

The SLS uses bowlines and the MSLS uses whoopie slings. Both use loops over the marlin spike at the tree in the same manner.

We have a hammock stand in the basement that we use for practice and testing and napping and over nighters.

Been putting up and taking down hammocks daily (and usually multiple times a day) for between a year and 2 years and the same suspension lines, AS-78.

The distance between "trees" never varies with the hammock stand and we usually "center" the hammock so approximately the same spot (probably within an inch) on the rope gets hung on the marlin spike and toggle.

I have never noticed any wear or chafing on the suspension rope in that time. The rope is now a shade of dirty gray instead of the brilliant white of new rope, but otherwise is in excellent condition with no visual signs of wear or chafing.

I don't expect that there would be any chafing in our use since the rope doesn't really slide over the marlin spike and webbing or rope hugger when the hammock is occupied. The suspension rope and hugger both swing together. No relative motion between the suspension and hugger.

The only time the suspension rope slides over the hugger and marlin spike is when the suspension is adjusted and then the hammock isn't occupied and so the wear is almost non-existent.

I think the important thing to consider here is that the hugger and suspension rope, i.e., the whoopie sling loop, form a single unit with no motion between the two when the hammock is hung and occupied. You need relative motion for chafing to occur. The AS-78 rope we use gets flattened for the portion looped over the marlin spike, but that's it.

Also, I've been using the whoopie sling now since the UCR was introduced by ZA206. The constrictor section has since been pulled back and forth over the same section of rope several times a day. I can see no visual wear or chafing of the rope under the constrictor section on the whoopie slings.

From this I conclude that the wear and chafing on the whoopie sling ropes used for a suspension, as we use them, is negligible.

[SlowBro]

Not that this advances the whoopie sling in any meaningful way, but I just want to report two things.

1. I just got back from 4 nights in the Weminuche Wildereness in So. Colorado using a whoopie sling suspension. It rained 2 of the 4 nights and the constrictor held without any slippage and the free end acted perfectly as a drip strip without any backup. Call me very satisfied.

2. This is my 100th post.

[Ken]

Not that this advances the whoopie sling in any meaningful way, but I just want to report two things.

1. I just got back from 4 nights in the Weminuche Wildereness in So. Colorado using a whoopie sling suspension. It rained 2 of the 4 nights and the constrictor held without any slippage and the free end acted perfectly as a drip strip without any backup. Call me very satisfied.

2. This is my 100th post.

I just got in from a one night trip, camping and doing light trail work in Linville Gorge. The whoopie slings were "rock solid".

Thanks to everyone who had contributed to this system!!

Ken

[MacEntyre]

You need relative motion for chafing to occur.

It's there. It's not rigid, so it's in motion.

However, for all practical purposes, chafe it negligible in that application...

...until it shows up, some time in the future.

We've beat the chafe horse to death now, I suppose.

- MacEntyre

[RTR]

We've beat the chafe horse to death now, I suppose.

- MacEntyre

Nope...... wait I just saw it blink.

[TiredFeet]

It's there. It's not rigid, so it's in motion.

However, for all practical purposes, chafe it negligible in that application...

...until it shows up, some time in the future.

We've beat the chafe horse to death now, I suppose.

- MacEntyre

I didn't say they weren't in motion, I said the relative motion was zero, i.e., they swing as a single unit.

[MacEntyre]

I didn't say they weren't in motion, I said the relative motion was zero, i.e., they swing as a single unit.

Yes, I gotcha, TiredFeet, I understand what you meant. It's that little bit of flex that makes negligible chafe.

It's me, really. I'm trained from an early age to have zero tolerance for chafe, even in negligible amounts. The skipper was fond of reminding us, "it all adds up, Gramma said, when she..."

I've tried to get help... It's just an interesting psychological phenomenon.

- MacEntyre

[Frawg]

... It's just an interesting psychological phenomenon.

...and a good trait in a guy who's making my pack!!