Page 1 of 2 12 LastLast
Results 1 to 10 of 17

Hybrid View

  1. #1
    Senior Member
    Join Date
    Sep 2007
    Location
    Belleville, ON
    Posts
    664
    Images
    26

    CF poles and Comfort shaping....

    Hi,

    New poster here.... Got interested in hammocks as lightweight alternatives to tents and pads. And as an inveterate DIY guy I came across this forum. I've made clothes, sleeping bags, overbags with Gore-tex, and a few boats... Been reading a bunch here over the last few days and decided to join.

    A couple of things have come to mind in all the reading I've covered.

    1) CF poles - have you guys looked at the kite building suppliers? CF poles are common in a whole range of sizes/weights and in nesting diameters and with inserts for joining in lengths. Kitebuilder.com is one such source. They also sometimes have interesting fabrics in very light weights at good prices (sale prices...) .75 oz or even 0.5 oz.... Not great for hammocks, but probably fine for very light cat cut tarps.

    2) In the HH diassembly thread there was some minor mention of bias cut material. It looked to me like they are indeed bias cut, but there is very little notice made of that. Bias cutting is likely a vital part of the "comfort" and apparent "flatness" and the final little bit of the secret of the HH hammock.

    The reason is that Bias cut fabric has more give and conforms much better to curves as the fabric is more able to distribute the pressure to other threads around it (assuming the threads aren't bonded to each other in some fashion like PU coating or silnylon.) This means that high pressure points will cause more give in the fabric in localized areas and this will make the sling/bed conform more naturally. The downside is that its likely that the edges of the hammock would require binding to maintain strength. Not really an issue if you're making something like a bridge hammock, but more work if you're making a whipped one. This knowledge comes from extensive fibreglassing experience where bias cut cloth will fold cleanly over a much sharper edge and conform tightly to compound curved surfaces where flat laid/cut cloth won't even come close, without bubbles, puckers, wrinkles and folds.

    Has anyone experimented with the bias cut idea?

    Looking forward to making a few hammocks and seeing what works best for me and my best girl.

  2. #2
    Senior Member headchange4u's Avatar
    Join Date
    Oct 2006
    Location
    Kentucky
    Hammock
    Dual Layer WB Blackbird
    Tarp
    OES Cuben
    Insulation
    SnugFit
    Posts
    6,267
    Images
    35
    First off, welcome to the forums.

    Due to the development of the Bridge hammock, I have been looking into CF pole quite a bit. There are several sources out there. I will check out the website you listed. Finding something that would allow you to break down CF poles into smaller sections would be a great benefit.

    What exactly do you mean by bias cut? The HH body is made from a rectangular piece of fabric and the shape of a HH comes from the asymmetrical shape of the netting, side tie outs, and the whipping/folding technique.
    “Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it." -Terry Pratchett



    Premium Quality, Fresh Roasted Coffee
    www.meancatcoffee.com

  3. #3
    Senior Member schrochem's Avatar
    Join Date
    Jun 2007
    Location
    Austin,Tx
    Posts
    796
    Images
    57
    Quote Originally Posted by headchange4u View Post
    First off, welcome to the forums.

    Due to the development of the Bridge hammock, I have been looking into CF pole quite a bit. There are several sources out there. I will check out the website you listed. Finding something that would allow you to break down CF poles into smaller sections would be a great benefit.
    I hear ya HC. I'm trying to get a hold of some aluminum .5" and .43" poles to see if they will hold. I know the .625 is fine. Then I can look a bit harder at the CF.
    From that kitebuilder site this looked promising.
    Not bad at 70g for 5'

    Also, the previous link you passed along on the Bridge thread.
    But, I keep remembering what Ron Bell said on his site

    ".355 outside diameter Multi-Ply- Multi Direction carbon fiber construction- Not just a simple pultruded or wrapped in one direction tube like cheaper CF poles"

    I wonder if that's the same as kitebuilder talking about unidirectional and a radial wrap??

    I went back to the graphitestore site

    So it seems the uni, pultruded isn't the best way to go but go for the uni-rolled wrap like this one
    Read the remarks there.
    So I still don't know which CF to get.....
    Scott

    "Man is a stream whose source is hidden."
    RWE

  4. #4
    Senior Member Redtail's Avatar
    Join Date
    Jan 2007
    Location
    Middletown, MD
    Hammock
    HH Expedition
    Tarp
    JRB 11x10
    Insulation
    DIY Climashield UQ
    Suspension
    Cinch buckles
    Posts
    334
    Images
    6
    Rapt,
    By bias cut, do you mean cut the fabric at a 45 degree angle to grain of the fabric?

    I'll have to check my HH tonight to see if it is bias cut.

    For homemade hammocks I don't think it's really an option since we use the full width of the fabric (usually 60-63"). You have to have some really wide ripstop to be able to make a bias-cut hammock out of a single piece of fabric.

  5. #5
    Senior Member
    Join Date
    Sep 2007
    Location
    Belleville, ON
    Posts
    664
    Images
    26
    Yes,

    Well actually bias cut means the threads of the weave of the fabric are at an angle (any angle not just 45 degrees) to the rectangular shape.

    So instead of the threads running parallel or perpendicular to the length and width of the hammock, they run at an angle (or bias).

    This is a standard sewing term and is used in making clothing that fits, drapes and conforms better.

    Good point about fabric width, it may require some tweaking or wider width fabric, or worse yet another seam. Also bias cut fabric tends to not holds its shape as well prior to sewing so its somewhat harder to sew with since you can't pull very hard on it without pulling it out of shape.

    Experiment with a small piece cut in a square on an angle and then pull on the various sides to see what happens....

    I understand the HH is a rectangular piece, but in one close up photo it looked like the warp and weft (threads of the fabric) were at an angle to the sides of the rectangle.
    Last edited by Rapt; 09-05-2007 at 09:58.

  6. #6
    Senior Member Redtail's Avatar
    Join Date
    Jan 2007
    Location
    Middletown, MD
    Hammock
    HH Expedition
    Tarp
    JRB 11x10
    Insulation
    DIY Climashield UQ
    Suspension
    Cinch buckles
    Posts
    334
    Images
    6
    Seeing the direction of the weave is pretty easy with ripstop.

    The more I think about it, a bias cut would be undesirable for a hammock. Since you are lying diagonally in the hammock it would be more comfortable for the hammock to stretch in that direction. You wouldn't want the length or width of the hammock to stretch. In other words, you'd want the grain of the fabric parallel/perpendicular to the centerline.

  7. #7
    Senior Member hangnout's Avatar
    Join Date
    Nov 2006
    Location
    Monterey, TN
    Hammock
    DIY Bridge
    Tarp
    DIY Tarps
    Insulation
    Leigh's UQ's
    Posts
    1,715
    Images
    122
    I don't think we have a choice since most of our ripstop comes 48" to 60" wide we can not cut a piece long enough on the bias without making a seam.

  8. #8
    Senior Member
    Join Date
    Sep 2007
    Location
    Belleville, ON
    Posts
    664
    Images
    26
    Good points...

  9. #9
    Senior Member stoikurt's Avatar
    Join Date
    Oct 2006
    Location
    Panama City, FL
    Hammock
    Custom 1.7/1.1 WB Blackbird
    Tarp
    DIY SWT
    Insulation
    JRB Nest & DIY RMS
    Suspension
    Whoopee Slings
    Posts
    1,000
    Images
    83
    As Redtail kind of eluded to we sleep on the diagonal, which in effect is lying in the bias directions, and therefore taking advantage of the stretch and conforming nature of a bias cut.
    Stoikurt
    "Work to Live...Don't Live to Work!"

  10. #10
    slowhike's Avatar
    Join Date
    Oct 2006
    Location
    Winston-Salem, NC
    Hammock
    DIY, gathered end , w/ spreader
    Tarp
    DIY w/ pull-outs
    Insulation
    DAM/ HG Incubator
    Suspension
    Webbing & rings
    Posts
    10,595
    Images
    319
    welcome to HF rapt.
    about those light weight fabrics... .75 oz or even 0.5 oz.... Not great for hammocks, but probably fine for very light cat cut tarps.
    are they water proof or maybe DWR treated?
    they might make a good hammock shell or quilt. ...tim
    don`t leave the CREATOR out of the creation!

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
  •