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  1. Replies
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    Almost 10 years ago (!) I looked at trimming...

    Almost 10 years ago (!) I looked at trimming weight on a JRB bridge. A bit of tongue-in-cheek but wade through the irony and you'll see how to whack 11 ounces from the set up, and that's using the...
  2. Oh yeah, I'm probably the founding member unless...

    Oh yeah, I'm probably the founding member unless TeeDee is, but he'd never fess up to that. Happily the only thing ever threatened by my javelins were curious squirrels in the yard, not expensive...
  3. Nice work, especially doing the modeling up-front...

    Nice work, especially doing the modeling up-front yourself. My models showed the same thing yours did about the straight line out past 8 or 9 inches. I've built bridges where the spreaders were...
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    I think forces are multiplied not only by the...

    I think forces are multiplied not only by the angle of the suspension triangle relative to the ground, but by the angle (under load) of the webbing or cord coming from the hammock body. Depending on...
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    Anything inflatable by human breath would surely...

    Anything inflatable by human breath would surely buckle under load. Compression force on the spreader bar is on the order of your weight. That's a lot of force.

    I did in fact toy with two...
  6. As is increasingly the case, Just Bill makes the...

    As is increasingly the case, Just Bill makes the points I would make, but several days earlier!
    On the one hand UCRs can be finicky and like Just Bill I rarely if ever sent a hammock to a customer...
  7. I've not used kevlar straps for webbing, but have...

    I've not used kevlar straps for webbing, but have experience with it as tree straps. ISTM the weave is a bit loose which would concern me about sewing in a loop, and I have started a 'tear' in one...
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    Nice new approach to the corner. I spent more...

    Nice new approach to the corner. I spent more effort, more ways, with different approaches to the recessed corner. Cut-outs of various kinds, re-enforcements, always the pain point of the design....
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    I did manage to make the splicing look harder...

    I did manage to make the splicing look harder than it is. For neigh on a couple of years I've had at the back of my mind to do a video just on that piece, but hasn't happened yet ....

    At the end...
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    bingo, there it is. Thanks Bill!

    bingo, there it is. Thanks Bill!
  11. Replies
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    2,081

    webbing on the sides to the pole tip, ending in a...

    webbing on the sides to the pole tip, ending in a loop. Cord from the pole tip forming sides of the suspension triangle. For the sides
    make a fixed loop, with the loop about 1.5" long, Lark's...
  12. my $0.05. The closer the width of the fabric...

    my $0.05. The closer the width of the fabric under a spreader bar is, the greater the compression force. Same principle as with shallow hang angles. If the spreader is 54" and the native fabric...
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    Especially because what works in one's head does...

    Especially because what works in one's head does not necessarily work in practice. This the the Voice of Experience speaking.

    I spent untold amounts of time and way too much money trying to build...
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    2,542

    More like what's the point in taking a working...

    More like what's the point in taking a working gathered end design and make it more uncomfortable by being narrow, and by embedding suspension webbing along the sides to rub into your ankles???
    ...
  15. Replies
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    2,542

    except I still have hair! Found the original...

    except I still have hair!

    Found the original dual mode hammock thread

    https://www.hammockforums.net/forum/showthread.php/4506-Grizz-joins-Club-Claytor

    a wee bit tongue-in-cheek for fun. ...
  16. Replies
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    3,485

    The principle is the same, angling forces is a...

    The principle is the same, angling forces is a multiplier. That said, a rigorous analysis of forces on webbing and biners/clips would need to account for effects due to the webbing on the tree,...
  17. Replies
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    Did the math. Ain't pretty. I suspected, and...

    Did the math. Ain't pretty. I suspected, and this was borne out, that it's not a matter of shifting a fixed amount of tension from one side to another. 1/sine(theta) isn't linear. The angle gets a...
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    yep. What's more it will be different when you...

    yep. What's more it will be different when you sit in the hammock (deeper) than when you lay out flat in it, when it becomes shallower. I guess the key is to use strong enough fabric and suspension...
  19. Replies
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    Appreciate that. In my day job we are concerned...

    Appreciate that. In my day job we are concerned about "impact", how what we teach or research influences others. So it's natural for those of us in the education biz to share...and I at least like...
  20. Replies
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    Cool! I'm sure a 10 year old will like crashing...

    Cool! I'm sure a 10 year old will like crashing hammocks and cartoon rocket ships <grin>


    Thanks, I appreciate your appreciation. It's true the engineering (which is a fancy word for...
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    Hey, good to see you here old timer! Thanks for...

    Hey, good to see you here old timer! Thanks for watching.

    Great that you understood the presentation. That was the point! Although it took me 12 minutes to explain slowly and with visual aids...
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    Video: A brief primer on the hang angle

    Work sends me to Asia for one and two weeks at time. It's a good time to work on videos, except of course that my hammocking gear is thousands of miles away, and a metropolitan area makes it...
  23. Replies
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    How 'bout that. I remember a stone house on the...

    How 'bout that. I remember a stone house on the west side of 120, south of Townhouse Rd. Wonder if that was it.
    We lived on the gravel road that passes though the Cornish Fairgrounds, North...
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    your instincts are on target, no formal training...

    your instincts are on target, no formal training needed. Short triangle sides not only induce high compression on the spreader bar, but will be under high geometrically induced load themselves....
  25. Much as I like being remembered and referenced,...

    Much as I like being remembered and referenced, the SRS wasn't my idea. It generated a lot of discussion when it was first introduced, I managed to natter on about it for 21+ minutes in that video...
  26. Replies
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    Early in my hammocking I managed to snap a 1200...

    Early in my hammocking I managed to snap a 1200 lb rated cord, not intentionally, owing to bad choice of knot, flat angle, and a dynamic load. Need to have a bumper sticker for hangers, "Geometry...
  27. Have come late to the party, typically these...

    Have come late to the party, typically these days, but not too late to say I like what I see here.

    Recessed bars do complicate things and there is much to be said for keeping things simple. Comes...
  28. Professor Hammock agrees with everything his star...

    Professor Hammock agrees with everything his star student JustBill has said. Particularly
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    that's a pretty hammock!

    that's a pretty hammock!
  30. Replies
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    pgibson makes a good point. If you go from 1/8"...

    pgibson makes a good point. If you go from 1/8" diameter to 1/4" diameter you'll need to double the length of the buries (between the parentheses math....the length of a bury is recommended to be be...
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    hey WV-- Directly attaching the corners of the...

    hey WV--
    Directly attaching the corners of the hammock to the stand seems to me to introduce a number of constraints that impact the size of the stand...where you'd make the connection would...
  32. Ha! I wish. That's the Marina Bay Sands, the...

    Ha! I wish. That's the Marina Bay Sands, the top of which has the 'Infinity pool'.
    157368157367
  33. Sorry 'bout that. I drop a lot of balls in the...

    Sorry 'bout that. I drop a lot of balls in the back and forth to Singapore. 24-30 hours of travel each way for a week of work, which translates into a couple of weeks of jet-lag, here and there,...
  34. I'm baack! 157082 seriously though, hammock...

    I'm baack!
    157082

    seriously though, hammock engineering has come to a bit of a stall owing to our letting the apartment which the sewing room out to the daughter of a family friend to help her...
  35. loved the story. That's trust in your...

    loved the story. That's trust in your instruction.

    Happens I have a cobra story too. Me, my wife, and then 13 yr old son were in Delhi, India. Walked into a sort of Indian strip mall and on a...
  36. Replies
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    That's pretty close to what I would do (I might...

    That's pretty close to what I would do (I might make the waist cut an inch or even two deeper.) Cut the body, hem the ends, roll in the webbing, sew it down, hammock body done. Very straightforward...
  37. I'm impressed. I had a run at grommets a while...

    I'm impressed. I had a run at grommets a while back, but was trying to embedded them in a wider strap through which I had to punch a hole. Always saw the strap pulling away from the grommet under...
  38. Replies
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    my earlier DIY hammocks used webbing on the sides...

    my earlier DIY hammocks used webbing on the sides like the RR. I would finish the ends by doubling back and sewing down, just as the RR does, of course not looped first into any hardware. But...
  39. I cooked up an easy-to-build bugnet for Boy Scout...

    I cooked up an easy-to-build bugnet for Boy Scout summer camp, which is equivalent to car camping. You trade weight to get easy build. Will have to describe by words as I'm 13 time-zones away from...
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    The first warning here is that 'catenary curve'...

    The first warning here is that 'catenary curve' may mean something more general to you than it does to an engineer. To the engineer it means a curve whose equation has a particular form. You have...
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    Ha! Just Bill is here giving some of my answers....

    Ha! Just Bill is here giving some of my answers. Other answers: (1) you can tape together ordinary 8.5" x 11" paper, draw half the arc on that, and then cut the arc. Provided you are really really...
  42. missed this the first time, happy to see it come...

    missed this the first time, happy to see it come up again. I did the reverse direction about 5 years ago, think I stayed at your last camp my first night. Really enjoyed the hike and the views. ...
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    very very nice!

    very very nice!
  44. Replies
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    Not to be pedantic (but being so anyway) the...

    Not to be pedantic (but being so anyway) the 'bent rod' method is a great and easy way to get a symmetric curve, but the curve you get will be neither parabolic nor catenary. I gather that the...
  45. I had to climb in the way-back machine to find...

    I had to climb in the way-back machine to find this, but here's the way I did webbing-side suspensions with an access slot for a pole tip.


    https://www.youtube.com/watch?v=YXxP0635MdA
    ...
  46. back when I embarked on the challenge of a...

    back when I embarked on the challenge of a 'light-as-possible' bridge hammock, I used cord instead of webbing because the cord was lighter. If this kevlar webbing had been around then I'm sure I...
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    That's an answer like I would have given if I'd...

    That's an answer like I would have given if I'd gotten here earlier. I just love the thought experiment approach to explanation. +1 kitsapcowboy
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    I like it!

    I like it!
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    More like a drive-by shooting.

    More like a drive-by shooting.
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    Must be a slow day at Dutchware World...

    Must be a slow day at Dutchware World Headquarters.
    So as long as we are tripping down memory lane....


    https://youtu.be/cS9FCi2ZDgw
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