Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 22
  1. #11
    Stavros's Avatar
    Join Date
    Oct 2008
    Location
    Lapland, Sweden
    Hammock
    WBBB 1.0DL
    Tarp
    Hammockgear Cuben
    Insulation
    UKhammocks UQ+TQ
    Suspension
    Warbonnet Webbing
    Posts
    801
    Images
    17
    Quote Originally Posted by Polecat View Post
    Hi, new here but been at the other forum for a while.....

    Anyway, I am enthralled by whoopee slings and possibilities,
    But because I'm cheap, I want to make them from locally available 3/8 inch yellow hollow braid poly rope.

    On the package it says working load is 200 lbs or so.
    But the specs on line gives 2880 lbs as tensile strength.

    see here:
    http://www.safelandindustrial.com/ap...il.asp?did=409


    I'm a big guy and with a 30° hang with my weight 200 lbs of tension is possible.

    Am I in danger of catastrophic headfirst midnight dismount (CMHD)?

    Polecat
    If my math isnīt totally wrong the tension on your line (with a 30° hang and weighing 200 lbs) would be 400 lbs.
    If the poly rope can take a load of 1980 lbs that would give you a safety of approx 1:5.
    Thatīs (for me) enough.

    But, and theres always one, is that the rope might be difficult to handle, it might not be weather-resistant and so on.
    But, test it, and let us know how it works.

    Says me, who is thinking in the same direction.....
    (Because I canīt get any Amsteel Blue where I live)
    No longer with a great "Yukon Yak Fever"

    The ships hung in the sky in much the same way that bricks don't (The Hitchhiker's Guide to the Galaxy)

    My pictures:My Picasa-album

    My paracord-webshop:Webshop
    Sorry dudes, only in Swedish (so far).

  2. #12
    Senior Member Browny's Avatar
    Join Date
    Apr 2010
    Location
    Perth, Western Australia
    Hammock
    DIY
    Tarp
    LARGE!
    Insulation
    DIY Bag UQ
    Suspension
    Nacras an Whoopies
    Posts
    246
    For what its worth, Ive had straps (cheap and effective ) rope and now some pre-made woopies ( in max length so I could diy some nacrabiners from the running end!)

    As a comment on previous posts, at the risk of being off topic:

    Being a DIY kinda guy, I like making my own stuff and being somewhat self-reliant. I can weld, swing a spanner, do woodwork and so on. Not everyone is like this. I build my own gear to give me pleasure, not cos it's always cheaper and definately not coz it's time efficient. This is why there are people who make "budget" alky stoves and cottage guys who make the "niche" equipment. If you dont like it, dont buy it....simple. However, there is always someone who feels that their time and effort is better spent doing what they do well, to earn the $$$ to pay someone else to do what they do well.

    This forum has been a breath of fresh air for me on the Net. To find such a broad, unbiased collection of info and good honest feedback (a lot of it from the people who's "gear" we are building DIY) is a rare thing.

    Sorry for the essay, but I'd hate to see this blow out into a big deal over a very small difference of opinions

    HYOH ...... Browny
    I dream of a better tomorrow, where chickens can cross the road and not be questioned about their motives.

  3. #13
    Senior Member
    Join Date
    Dec 2007
    Location
    Doraville, GA
    Posts
    947
    Images
    23
    I used 3/8 in, hollow braid polypropylene line for a good while. I did not use it with as a whoopie sling so I don't know how well it works for that. A simple slippery bowline knot held and released fine which makes adjustments pretty easy to do. A slippery bowline knot words so well with that rope that I don't know that I would worry about making a whoopie sling with it. Whoopie slings are neat for hammock suspensions but they have their negatives as well. One thing is that you use a lot more rope, about twice as much. And when you have it adjusted to its minimum length you have a lot of excess rope hanging off, in the way. With small diameter AmSteel that isn't near the problem it will be with bulkier, heavier, and springier polypropylene.

    It is nice that you can find it at practically any hardware store and for a reasonable price. What I don't like about it is it stretches continually during the night, which is something you can deal with but once you use a suspension that doesn't stretch like that you probably won't be happy with one that does. I typically ended up 6 inches or so lower to the ground in the morning with the polypropylene line. But heck, it works, is easy to get, and doesn't cost much; sometimes that's all you want.
    Youngblood AT2000

  4. #14
    MacEntyre's Avatar
    Join Date
    Sep 2007
    Location
    Jamestown, NC
    Hammock
    Molly Mac Gear
    Posts
    7,566
    Images
    6
    Quote Originally Posted by Youngblood View Post
    What I don't like about it is it stretches continually during the night, which is something you can deal with ...
    That's the "walking" I was referring to... after stretching a small amount, polypropylene walks, in that it no longer rebounds or recovers 100%. The result of walking is narrowing; it's kind of a permanent stretch. If the load is enough to cause it to walk, it can eventually lead to failure, as each time you hang it walks a little further.

    Of course, we probably have lots of hangers here who will say that they have hung for years with light, braided polypropylene, without any problems!
    "We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
    www.MollyMacGear.com

  5. #15
    Senior Member
    Join Date
    Dec 2007
    Location
    Doraville, GA
    Posts
    947
    Images
    23
    Quote Originally Posted by MacEntyre View Post
    That's the "walking" I was referring to... after stretching a small amount, polypropylene walks, in that it no longer rebounds or recovers 100%. The result of walking is narrowing; it's kind of a permanent stretch. If the load is enough to cause it to walk, it can eventually lead to failure, as each time you hang it walks a little further.

    Of course, we probably have lots of hangers here who will say that they have hung for years with light, braided polypropylene, without any problems!
    I think that the stretch under tension of all ropes leads to failure and is why over the years I have brought up my concerns of people tying too low on the trees and repeatedly retightening with some of the suspension adjustments that allow them to pull the suspension very taut. (I have wondered if a certain load caused a certain amount of stretch and it was the specific stretch that caused the failure rather than a specific load causing a failure. If a load was hanging straight down that argument would be mute; but with our horizontal loading that is reduced by stretching under some initially tremendous loading and can be retightened and stretched again before it has recovered, that may not be a mute point.)

    I used the 3/8 hollow braid polypropylene for a few years without any problems, but without a structural ridgeline and have know of quite a few others that have as well. I don't know what Clark Hammocks is using these days but at one time they used 3 twisted stands of polypropylene rope, 1/4 on some and maybe 3/8 on others? I didn't like the 3 strands on my home made hammock because I had the strands separate enough where I had tied and released a slippery bowline that it looked like only 2 strands might take the load, and I didn't like that.
    Youngblood AT2000

  6. #16
    Stavros's Avatar
    Join Date
    Oct 2008
    Location
    Lapland, Sweden
    Hammock
    WBBB 1.0DL
    Tarp
    Hammockgear Cuben
    Insulation
    UKhammocks UQ+TQ
    Suspension
    Warbonnet Webbing
    Posts
    801
    Images
    17
    Quote Originally Posted by peter1969 View Post
    If my math isnīt totally wrong the tension on your line (with a 30° hang and weighing 200 lbs) would be 400 lbs.
    If the poly rope can take a load of 1980 lbs that would give you a safety of approx 1:5.
    Thatīs (for me) enough.

    But, and theres always one, is that the rope might be difficult to handle, it might not be weather-resistant and so on.
    But, test it, and let us know how it works.

    Says me, who is thinking in the same direction.....
    (Because I canīt get any Amsteel Blue where I live)
    Hmm, I have to quote myself since Iīve got some corrections about my math...
    The tension of 400 lbs is on BOTH lines which means that the tension on each line is 200 lbs. That means that the safety is 1:10.

    But as someone said to me there are knots and other things that will make the line less strong which means that 1:10 is if the knots are perfect and there isnīt anythin as a perfect knot

    Still you should be able to use that line and sleep safe during the night!
    No longer with a great "Yukon Yak Fever"

    The ships hung in the sky in much the same way that bricks don't (The Hitchhiker's Guide to the Galaxy)

    My pictures:My Picasa-album

    My paracord-webshop:Webshop
    Sorry dudes, only in Swedish (so far).

  7. #17
    canoebie's Avatar
    Join Date
    Mar 2008
    Location
    Edwardsburg, MI
    Hammock
    DIY
    Tarp
    Super Ogee
    Insulation
    DIY IX UQ, Phoenix
    Suspension
    Whoopie Slings, dc
    Posts
    2,555
    Quote Originally Posted by weedeater64 View Post
    You've got to be careful what you listen to around here. I suspect a lot of these guys work for some of these manufactures.

    Many of them will have you spending 10 times what you need to.

    Having said all that, poly-rope isn't very nice to work with in my humble opinion. I like softer more pliable material. But that is a matter of preference not function.
    There is a big difference between cheap and inexpensive. This was a cheap shot, amsteel is inexpensive.
    Revolution is about the need to re-evolve political, economic and social justice and power back into the hands of the people, preferably through legislation and policies that make human sense. That's what revolution is about. Revolution is not about shootouts.

    Bobby Seale


    http://www.riverjourneys.org

  8. #18
    Senior Member KerMegan's Avatar
    Join Date
    Aug 2009
    Location
    Irving, TX
    Hammock
    not quite eno..
    Tarp
    10x12 DIY
    Insulation
    insultex+momentum
    Suspension
    DIY whoopie slings
    Posts
    2,479
    Images
    2
    even better when you consider the strength to weight ratio of each, and then compare the strength to cost/foot of each one. Amsteel may cost more per foot, but less per unit of weight supported and less (I think) per ounce. certainly less per cubic inch occupied in the pack.
    Win, Win, Win!
    KM (who hopes that helped some..)

  9. #19
    Stavros's Avatar
    Join Date
    Oct 2008
    Location
    Lapland, Sweden
    Hammock
    WBBB 1.0DL
    Tarp
    Hammockgear Cuben
    Insulation
    UKhammocks UQ+TQ
    Suspension
    Warbonnet Webbing
    Posts
    801
    Images
    17
    Yeah, youīre probably right on that one.
    But, since I live in Sweden, I would have to order Amsteel from US if I want some of that. Itīs easier to get polypropylene-rope from my hardwarestore.
    No longer with a great "Yukon Yak Fever"

    The ships hung in the sky in much the same way that bricks don't (The Hitchhiker's Guide to the Galaxy)

    My pictures:My Picasa-album

    My paracord-webshop:Webshop
    Sorry dudes, only in Swedish (so far).

  10. #20
    turnerminator's Avatar
    Join Date
    Sep 2009
    Location
    Peterborough,UK
    Hammock
    DIY Pertex
    Tarp
    DIY with doors on
    Insulation
    Down and synthetic
    Suspension
    Whoopies & hooks
    Posts
    1,335
    Quote Originally Posted by peter1969 View Post
    Yeah, youīre probably right on that one.
    But, since I live in Sweden, I would have to order Amsteel from US if I want some of that. Itīs easier to get polypropylene-rope from my hardwarestore.
    You don't need amsteel, there are equivalent european ropes.

    Marlow, English braids, Liros to name a few. Arboreal throw lines like zing it must be available too, you guys aren't short of trees.

    Check out these guys, they do 2mm 900 kg dynamic line for Ģ1.40/ M. Its great for whoopies.

    http://www.nauticalrope.co.uk/index....ex&cPath=41_44

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •