- MacEntyre
"We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
www.MollyMacGear.com
Actually, I'm willing to dispense with "inexpensive" for the time being, but I don't think we've achieved the other two yet in a form that works over a very wide temperature range. Besides, for me "perfect" must include "no fiddle-factor".
Simpleton? Pffft, ya right! Most excellent write up, thanks for sharing.
- MacEntyre
"We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
www.MollyMacGear.com
Good bump.
Grizz, a few q's.
You stated you used sil as the inner layer..
How does that perform as far as condensation is concerned.
This thread is obviously from the archives ('08) and sil has been, as of late, a no-no for breathabilty and condensation.
What say you?
Ambulo tua ambulo.
Fun to get a bump! Been a long time since I wrote so much in a posting.
yep.
I think it is possible to overthink these things, and you and me are just the kind of guys who do!
So I'm reminded of some work I did early on in the DIY bridge hammock explosion of posts working with a model to craft a suspension curve to the particulars of a person's weight distribution. You get to the foundational specifics of what's going on in a suspension bridge, go after the assumptions of uniform weight load, tinker with the equations to allow for heterogeneous weight distribution, and voila! A personalized suspension curve. I even made a couple of hammocks using that...but as far as I could tell it didn't matter
So, you're right, even with a bridge hammock it would be better to do a little tucking on the inner body so that in the region of the butt there is a little more space when the body is cinched up. I haven't taken that one on yet.
So on the inner layer being sil...my next UQ after that was a bit lighter for summer as well as the warmer ends of spring and fall, and I used Cuben for the inner layer of that one (mom-90 for the outer layer). All the hanging I've down in my bridges for the last couple of years have been with non-breathable inner layer under-quilts. My motive for these has been to limit the possibility of moisture getting into the down, doesn't belong there if it can be helped, particularly if I have a weather cover as well (and I have one of those in Cuben as well, with venting on the bottom.)
In all this I've not experienced any problems with condensation that I've notices. Perhaps the fact that there's a layer of wicking nylon between me and the UQ helps. Perhaps the fact that what I wear to bed wicks also helps. I dunno, the way I do things, it's not been a problem.
As it happens I'm in the midst of making another UQ, this too has a non-breathable inner layer. Perhaps there's a "Grizz makes an UQ" video in the offing....
Grizz
(alias ProfessorHammock on youtube)
That's a good approach, I'm sure. On cold hangs last winter I used highly breathable fabrics, for the same reason: to keep condensation out of the down. I was amazed at how well it worked. So, I've become an insulation schizophrenic, alternately using non-breathable and breathable layers. What got my attention was the realization that there is a huge humidity differential between my skin at 85*F and the outside at -15*F. I think some of us don't make much condensation, or it goes up or out or somewhere, while others find a puddle of water in the morning.
- MacEntyre, up at 0430, tough to stay on-topic
- MacEntyre
"We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
www.MollyMacGear.com
The "Search" function is your friend!
*Heaven best have trees, because I plan to lounge for eternity.
Good judgement is the result of experience and experience the result of bad judgement. - Mark Twain
Trail name: Radar
2014 Smoked Butt Hang Planning Thread | Sign up Sheet
Grizz, thanks for the walkthrough. I'm part way through building my own and I've taken the liberty of creating a calculations page on Meteor's google doc page to ease the process for anyone else.
Users can enter their desired specifications (finished length, head width, foot width, # of baffles, baffle height & fill power) and it'll spit out a basic parts order list (yrd of cloth, oz of down, baffle material are), and measurements to cut. It also lists metric units for our non-american friends.
Feel free to add things I've forgot/haven't realized I need. (Line locks, shock cord...)
DIY Bridge Hammock Trapezoidal Underquilt Calculations Spreadsheet
-Ed
Bookmarks