Page 1 of 6 123 ... LastLast
Results 1 to 10 of 51
  1. #1
    Senior Member Arkwater's Avatar
    Join Date
    Oct 2006
    Location
    Arkansas
    Hammock
    DIY Bridge
    Tarp
    DIY cat diamond
    Insulation
    DIY down UQ & OQ
    Posts
    234
    Images
    19

    Bridge design questions

    Got the stuff together to sew a bridge hammock but have a couple easy questions. What is the optimum cat cut for an 8 footer? & optimum spreader bar length? Thanks

  2. #2
    GrizzlyAdams's Avatar
    Join Date
    Apr 2007
    Location
    Illinois
    Hammock
    DIY Bridge, v0.n, where n is large
    Tarp
    depends on season
    Insulation
    DIY UQ
    Posts
    4,628
    Images
    564
    Quote Originally Posted by Arkwater View Post
    Got the stuff together to sew a bridge hammock but have a couple easy questions. What is the optimum cat cut for an 8 footer? & optimum spreader bar length? Thanks

    question noted. busy like crazy today chasing funding, even wearing a tie. I will form typical wordy response filled with qualifications, hithertos, and wheretofores later this p.m.

    Grizz the momentarily harrassed

  3. #3
    Senior Member Cannibal's Avatar
    Join Date
    May 2007
    Location
    Denver, CO
    Hammock
    Warbonnet ON!
    Tarp
    SuperFly or MacCat
    Insulation
    Yetis & Mambas
    Suspension
    Webbing and rings
    Posts
    13,919
    Images
    136
    Quote Originally Posted by GrizzlyAdams View Post
    question noted. busy like crazy today chasing funding, even wearing a tie. Grizz the momentarily harrassed
    Wanna borrow my Italian shoes?

  4. #4
    GrizzlyAdams's Avatar
    Join Date
    Apr 2007
    Location
    Illinois
    Hammock
    DIY Bridge, v0.n, where n is large
    Tarp
    depends on season
    Insulation
    DIY UQ
    Posts
    4,628
    Images
    564

    Kleen Keenes

    Quote Originally Posted by Cannibal View Post
    Wanna borrow my Italian shoes?
    no need. I just ran the garden hose over my Keenes to clean them off, then kept my feet under the conference table.

    Grizz

  5. #5
    GrizzlyAdams's Avatar
    Join Date
    Apr 2007
    Location
    Illinois
    Hammock
    DIY Bridge, v0.n, where n is large
    Tarp
    depends on season
    Insulation
    DIY UQ
    Posts
    4,628
    Images
    564
    Quote Originally Posted by Arkwater View Post
    Got the stuff together to sew a bridge hammock but have a couple easy questions. What is the optimum cat cut for an 8 footer? & optimum spreader bar length? Thanks
    The piece I'd cut for my next version (if it was 8' long) is illustrated in the attached diagram. It assumes a recessed pair of rings for the head spreader bar, like I'm doing for v0.2. It assumes that 1.5" of fabric are taken up by rolling onto the suspension webbing.

    The key ideas are
    (i) you want 36" finished at the narrowest point, so that when you're on your side both knees stay in the hammock.

    (ii) You get 48" of fabric (finished) spread by 36" of spreader bar. This is the spread I'm using and it is noticably better than when I used 36" (or even 39") at the head corner rings.


    For compression reasons you don't really want to have a spreader bar wider than 40"; 36" with the recessed rings works nicely, but this, along with 36" at the narrow part, implies a 6" cut. I did a 6" cut on the lower suspension lines of the grey prototype buried under piles of Bridge Hammock thread posts, works fine.

    If I would fix the size of the suspension triangle, and assume that the angle of ascent of the suspension lines from the rings is 30 degrees, I could then shape the edges of the piece above the recessed spreader bar so that I'd get a flat floor there.

    hitherto, wheretofore, and thereabouts,
    Grizz
    Attached Images Attached Images

  6. #6
    hey grizz, can you lay on your side with your knees bent in the fetal position?

  7. #7
    GrizzlyAdams's Avatar
    Join Date
    Apr 2007
    Location
    Illinois
    Hammock
    DIY Bridge, v0.n, where n is large
    Tarp
    depends on season
    Insulation
    DIY UQ
    Posts
    4,628
    Images
    564
    Quote Originally Posted by warbonnetguy View Post
    hey grizz, can you lay on your side with your knees bent in the fetal position?
    yes.

    the knees are up against the side of the hammock but they pushing out on it only a little bit. Spent a bit of time that way one night when I miss-hung and had a banana shape, so I just settled into the dip and curled up.

    Grizz

  8. #8
    would the tighter hang required to relieve the banana position place more tension on the sides, and as result push harder on your knees? basically, do you think the loose hang facilitated less pressure on your bent knees? i just ask, b/c i wasn't able to get into the fetal position in mine, although, that could be attributed to other factors such as hammock dimensions too.

  9. #9
    GrizzlyAdams's Avatar
    Join Date
    Apr 2007
    Location
    Illinois
    Hammock
    DIY Bridge, v0.n, where n is large
    Tarp
    depends on season
    Insulation
    DIY UQ
    Posts
    4,628
    Images
    564
    Quote Originally Posted by warbonnetguy View Post
    would the tighter hang required to relieve the banana position place more tension on the sides, and as result push harder on your knees? basically, do you think the loose hang facilitated less pressure on your bent knees? i just ask, b/c i wasn't able to get into the fetal position in mine, although, that could be attributed to other factors such as hammock dimensions too.
    I don't think the banana was that pronounced. I'm like the princess and the pea when you get used to flat, you get real spoiled.... It took a while for me to realize that I was messing with my knees, another solution would have been to stick something under them.

    yours started out considerably narrower, as I recall. Like 48" maybe. With what cut depth?

    Grizz

  10. #10
    i can't even remember now, when i finish my stand i will likely pull it out again and start messing around with it some more. so many projects, so little time.

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
  •