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 02-15-2012, 09:30 #31 egrant5329 Senior Member     Join Date: Aug 2011 Location: Grantham, NH Hammock: Grizz style Bridge Insulation: Primaloft Sport UQ Suspension: Dynaglide Posts: 161 Ber, It split at the female part of the ferrel and split the entire length. It was my own stupidity that caused it with a way too short suspension triangle. I think it would have lasted otherwise. I believe a good way of estimating the center width is to (((header - footer)/2) + footer). Then you have to subtract the depth for the cat curve cuts. 42" - 30" = 36" minus cat curve depth 39" - 30" = 34.5" minus cat curve depth 36" - 36" = 36" minus cat curve depth I have a narrow tarp so I was trying to keep the spreader bar width down, but I may think about doing a 42". I wonder what happens if you make one without a cat curve cut on the sides? If you notice the entire length of the hammock (whoopie, triangles and hammock) form a cat curve when you are in it. I think the sides exagerate the cat curve when you in the hammock, so if you didn't cut a cat curve on the sides wouldn't you still get a cat curve due to your weight pulling in the edges. Hmmm something to think about a bit more. __________________ Ed
02-15-2012, 11:55   #32
BER
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Join Date: Jul 2009
Location: USA
Posts: 1,747
Quote:
 Originally Posted by egrant5329 I wonder what happens if you make one without a cat curve cut on the sides? If you notice the entire length of the hammock (whoopie, triangles and hammock) form a cat curve when you are in it. I think the sides exagerate the cat curve when you in the hammock, so if you didn't cut a cat curve on the sides wouldn't you still get a cat curve due to your weight pulling in the edges. Hmmm something to think about a bit more.
I think you would lose some of the flatness, but I think Grizz or TeeDee or others more experienced than me would know better.

02-15-2012, 13:32   #33

Join Date: Apr 2007
Location: Illinois
Hammock: DIY Bridge, v0.n, where n is large
Tarp: depends on season
Insulation: DIY UQ
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Quote:
 Originally Posted by egrant5329 Ber, I believe a good way of estimating the center width is to (((header - footer)/2) + footer). Then you have to subtract the depth for the cat curve cuts. 42" - 30" = 36" minus cat curve depth 39" - 30" = 34.5" minus cat curve depth 36" - 36" = 36" minus cat curve depth
I always use (header+footer)/2. Works out to be the same. Comes from
thinking of the width as a linear function of the fraction of the length
of the hammock

where lambda=1 means you're at the head, lambda=0 means you're at
the foot, and lambda= 1/2 means you're half-way inbetween.

Quote:
 I wonder what happens if you make one without a cat curve cut on the sides? If you notice the entire length of the hammock (whoopie, triangles and hammock) form a cat curve when you are in it. I think the sides exagerate the cat curve when you in the hammock, so if you didn't cut a cat curve on the sides wouldn't you still get a cat curve due to your weight pulling in the edges. Hmmm something to think about a bit more.
what happens is that your middle part sags lower than the rest of the hammock. In a hammock with side suspension and a curved side, the middle part is held up creating flatness because there is less fabric there. With the hammock with suspension and flat sides you'll have the sides dip in the center, but because the hammock is the same width there, the center is lower. The sides dip because the hammock is sort of folding in the middle. Anyway, won't be flat.
__________________
Grizz

 02-15-2012, 17:18 #34 BER Senior Member   Join Date: Jul 2009 Location: USA Posts: 1,747 Figures Grizz would throw lambda in there to make it all clear.
 03-01-2012, 10:27 #36 egrant5329 Senior Member     Join Date: Aug 2011 Location: Grantham, NH Hammock: Grizz style Bridge Insulation: Primaloft Sport UQ Suspension: Dynaglide Posts: 161 Can you post pictures of your carbon fiber poles and size/source info. I posted mine under cerbon fiber poles, apparently I can't spell. My poles were sectioned 3 piece for the header and 2 piece for the footer. Unfortunately while playing around I used a very short triangle and had pole failure. My aluminum pole worked fine in the same setup, but the CF pole couldn't take the strain. Thanks, Ed __________________ Ed
 03-01-2012, 11:01 #37 BER Senior Member   Join Date: Jul 2009 Location: USA Posts: 1,747 I too would like to see your setup TeeDee!
 03-01-2012, 14:29 #38 jons4real     Join Date: Jun 2010 Location: Berks county Pa Hammock: Crinkle Custom Tarp: HH Insulation: brrr Suspension: Whoopies, Straps Posts: 1,452 That thing is Purdy for sure , heck I'd buy one. __________________ "What one Man can do, another can do!" Jons4real http://www.youtube.com/user/jons4real
 03-05-2012, 22:45 #39 Statesfadeaway New Member   Join Date: May 2011 Location: Louisville ky Hammock: wbbb dl 1.7 Tarp: wht litning 10x12 Insulation: diy sew pluq Suspension: webbing, buckles Posts: 20 You need the cat cut to get the flat lay. For sure.
 03-12-2012, 14:01 #40 TeeDee Senior Member     Join Date: Jan 2007 Location: Maryland Hammock: DIY Bridge Tarp: DIY 10'x11' Suspension: Whoopie Slings View my gallery 300 Posts: 1,636 Images: 300 A small update on the carbon fiber spreader bars. They are still working great. But I was getting a little nervous about butting the two sections of carbon fiber at the slip joint. Not too sure that butting the carbon fiber against carbon fiber under pressure would last long term. So I took out a little insurance: Got an O-ring that fit tightly on the Al part of the slip joint and slid it up tight against the carbon fiber tube. That places the small O-ring between the two carbon fiber tubes of the slip joint. Hopefully this will reduce or eliminate the wear of the two carbon fiber tubes against each other under pressure. Time will tell. __________________ Those who sacrifice freedom for safety, have neither. Do not dig your grave with your teeth. (Unknown)

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