RE: [Hammock Camping] Re: Can you make an asym hammock
> > > I don't think the asym characteristic is achieved by how oneLooking at it, you might assume so, but I don't use the pullouts and my
> > > folds the ends of the hammock, I think it is achieved by the
> > > position of side pullouts.
> > Actually it has to do with the bias of the cloth. Just moving the
> > side pullouts isn't the same thing.
> How so? Don't the pullouts on the HH asym hammocks create the
> asymmetrical shape that gives these hammocks their name?
hammock is still asymmetrical. Folks who don't sew their own clothes rarely
understand, much less know about, fabric bias.
Essentially all fabric comes on a bolt. The nylon cloths used to make
hammocks is no different. You can't just cut a suit of clothes out of a
piece of fabric willy-nilly. You have to appreciate the bias of the cloth
so that the finished clothes hang right. Fabric has a weave. This weave
stretches very little across the grain in either direction, but along the
bias - 45 degrees off straight grain - there is a much greater stretch.
An asymmetrical hammock uses this to an advantage. It is NOT the same as
simply laying in a non-asym hammock at an angle. What's the difference?
Well, think about a piece of fabric that you're going to make a hammock out
of. Let's say that it's 4 by 8 feet. If we gather the small ends and tie
our ropes, this is a symmetrical hammock. The fabric will stretch very
little. The 'lay' of the hammock will be somewhere around six feet, and
will probably be comfortable. Instead of tying at the narrow ends, think
about tying at opposite corners. Now you have an asymmetrical hammock. The
'lay' of this hammock - made from the same size piece as the first one -
will be very nearly 8 feet or maybe a little more, and the 'lay' will be
Of course, you can't just tie two corners like that... You have to cut the
piece in such a way that you can tie enough of it so that you get enough of
it tied into the rope so that it's strong enough. Tom doesn't actually have
this quite right. I think he's found a balance between weight and lay. If
he used a bit more material, the asym hammocks could be a little flatter.
The bug netting also has something to do with it, I think, but I haven't cut
one apart to actually see what his cut lines are. I built my first
asymmetrical hammock in about 1993 and it took me a few tries to figure it
out. Tom's design is solid.
None of this is to say that there's anything wrong with a non-asym hammock
that hangs along the fabric grain. I just think that it's important to
appreciate that there is a real difference in the two methods - and it has
nothing to do with the placement of the tieouts.
> Without the associated side pullouts currently used to form anI can rock in my asym. Why shouldn't I be able to?
> asymmetrical shape, I can gently rock in my hammock.
> I think the side pullouts used with the current asymmetricalSimply don't tie them. I never tie the pullouts...
> hammocks are somewhat problematic for a side entry hammock and that
> is my preferred entry method.
> In my experience, the bottom entry method isI use a 27" pad, and with the asym design, the edge of the pad is right at
> more difficult to deal with when you need bottom side insulation and
> I usually need something for bottom side insulation since I mostly
> hammock camp in the mountains where night time temperatures require
> at least some insulation.
the base of the slit. This is perfect. I sit on the pad right where I need
to be. The slit is never an issue. It IS an issue in a non-asym hammock if
there is a bottom slit.
> There is not anything preventing a person from laying diagonal in aBut it's NOT the same thing.
> well designed hammock that doesn't have an asymmetrical shape.
> II can lay diagonal to the left, and I can lay down the center. I usually do
> can lay diagonal to the left, diagonal to the right or right down
> the enter axis of my hammocks.
when I'm reading. I can't lay diagonal to the right. I thought that this
might be a problem at first because most of my life I slept diagonal to the
right, but I quickly got used to laying left.
> I find that laying on a diagonal sometimes results in a slightThis is not an issue in an asym hammock.
> discomfort to the shoulders that I refer to as `shoulder squeeze'.
> I found that I am sometimes more comfortable lying down the centerThere is a lot of play in it. This is your preference, and that's fair
> axis of the hammock and primarily
> just shifting my feet and legs either to the left or right until I
> find my sweet spot. I think the asymmetrical design encourages one
> to lay on a more severe diagonal and to one particular side, I like
> the freedom to pick the side if I choose to lay on a diagonal.
> But these are just my opinions and we all are entitled to our own.Agreed, but some of the above forces me to ask a rude question. Have you
> Obviously, many people genuinely like the asymmetrical design. I
> think it is great that we have these choices.
ever actually TRIED an asym hammock? Hennessey or no?
MessageI know....I was agreeing with you. It *does* happen, from time to time...... ;o)Jerry
http://www.BackpackGearTest.org : the most comprehensive interactive gear reviews and tests on the planet.-----Original Message-----> > Actually it has to do with the bias of the cloth.
From: Shane Steinkamp [mailto:shane@...]
Sent: Monday, October 04, 2004 9:29 PM
Subject: RE: [Hammock Camping] Re: Can you make an asym hammock
> It also has to do with the characteristics of the fabric weave. It
> stretches more in one direction than the other.
Yeah... That's what bias means...
- Message> I know....I was agreeing with you. It *does* happen, from time to
> time...... ;o)Ah. OK, then. I was caught off guard by that... ;)
Okay, I see what you meant. I didn't realize that the fabric for the
hammock bed is oriented such that it is on a diagonal to the fabric
weave, or like you said, on a bias of the cloth. Thanks for pointing
that out, that does mean that what I stated was not correct. I now
see that the side pullouts are positioned to 'compliment' the asym
nature of the hammock rather than 'causing' the asym nature.
- Shane,Many thanks for your explanation of the bias cut for asym hammock design. I wasn't aware of this and it adds an important new dimension to my attempts using my test hammock. See post on my variation on this idea.I like the HH too, but I want to make a light, efficient open hammock, without net or other HH features that is as comfortable.Best, Todd in Tarzana.
- --- In firstname.lastname@example.org, "Shane Steinkamp" <shane@t...>
...> Agreed, but some of the above forces me to ask a rude question.
> ever actually TRIED an asym hammock? Hennessey or no?Yes, I used one extensively on backpacking trips for about a year.
It was the Hennessy UtraLight Backpacker Asym, which was the first
asym model that came out and the only asym model available at the
time I purchased it.
I believe we had discussions previously where we disagreed on a
particular point and someone wisely pointed out that the hammock you
were using was larger that the one I had and that might be why we saw
details differently. I believe you use the Hennessy Explorer Deluxe
A-Sym, which is a bit larger than the one I used. That might again
explain some of the different opinions as well as the fact that I
used the side pullouts with mine and you apparently do not. But then
again, it is also possible that we see the same thing but judge it
differently... such is life.
- On test hammocks, Risk has a great idea there. Thanks, Risk.Try this variation so you can try different gathers and bias ideas:Instead of an end knot, pass the gathered material on each end through a Home Depot welded steel ring, about 2" in diameter and 3/16" thick. Secure the material to itself with a split piece of black rubber hose and a standard stainless steel worm-gear hose clamp. Buy the hose, about 1 and 1/2 inch in diameter from the same store. You can buy 1 foot off the roll, cut this into about 2 1/2" segments and split them along oneside with a knife. Cut out 1/8" or so if the hose doesn't close tightly enough around the folded hammock end.This allows you to clamp and unclamp in minutes.WARNING!!! If this is not done right the material can slip through and you'll hit the ground! This happened to me the first time I tried it.Make sure the clamp is very tight, don't hang the hammock very high, and put a lounge chair pad on the ground underneath just in case.Better would be to sew a safety margin on the end of the material so it can't slip throught the clamp even if it slips. This is for design testing only!I learned a huge amount from doing different folding and rolling schemes, including off-axis rolls and folds. There's nothing like lying in a hammock real time to figure out what's going on, and this method makes it possible. Small changes have large, non-obvious results.If this is not clear, speak up and I'll post pictures.Best, Todd in Tarzana.
- So, can you tell us what you learned? Especially on the off axis
Bill in Houston
--- In email@example.com, ptoddf@a... wrote:
> On test hammocks, Risk has a great idea there. Thanks, Risk.
> I learned a huge amount from doing different folding and rolling
> including off-axis rolls and folds. There's nothing like lying in a
> time to figure out what's going on, and this method makes it
> changes have large, non-obvious results.
> If this is not clear, speak up and I'll post pictures.
> Best, Todd in Tarzana.
- On Oct 5, 2004, at 10:49 AM, Dave Womble wrote:
>I've used this model as well. I've slept in it for about a month total.
> --- In firstname.lastname@example.org, "Shane Steinkamp" <shane@t...>
> ...> Agreed, but some of the above forces me to ask a rude question.
> Have you
>> ever actually TRIED an asym hammock? Hennessey or no?
> Yes, I used one extensively on backpacking trips for about a year.
> It was the Hennessy UtraLight Backpacker Asym, which was the first
> asym model that came out and the only asym model available at the
> time I purchased it.
I used the older non-asym ultralight backpacker on the trail for about
a month, too.
The big difference to me was that when I rolled over in the asym I
need to switch diagonals. I almost always sleep with a pad in the
so switching diagonals is a pain. It didn't feel roomier to me. (But
so I had plenty of room to start with.)
- --- In email@example.com, "seuss910" <wrv77@y...> wrote:
> Asymmetry was achieved with the cut of the hammock, not so muchsewed
> with the fold. I started with a kind of squared off trapezoid,
> a soft webbing along the end hems for bulk, pleated the ends, andThis is similar to what I did, but I used a shape more like a
> then tied the hanging straps around the bunched ends.
parallelogram, like so: http://tinyurl.com/62zmc
I kept the bias of the cloth aligned with the support points (i.e.
centerline of the hammock), since you don't want any stretch in that
dimension. I got a moderate asym feel with a 3" cut on each side.
I'd be tempted to go to about 6" for the next try.