errantember: (Little Cowboy Scott)
[personal profile] errantember
So when I decided to turn my 6' hexayurt into a 6' stretch, I didn't want to lose the convenience of having it transportable in only two pieces. As you can see here, upgrading the walls simply means adding two more 4'x4' panels to the existing 6 for the wall, and you're done. That part was easy.

It was the roof I was worried about. The existing 6-piece roof fanfolds neatly in exactly the same way the walls do, but how was I going to make the new roof, with it's lack of radial symmetry, do the same? All the scenarios I could think of in my mind involved at *least* three if not four pieces total, which would be *much* less convenient than only two. Not only that, but while the current roof, *un*like the walls, actually fits inside my Honda CR-V, I was really afraid that the upgraded version wouldn't. How could I keep it inside the vehicle?

Inspired by a showing of Oh Brother Where Art Thou, I found the answer:

Hexayurt_stretch 1


Hexayurt_stretch 2

Hexayurt_stretch 4

Hexayurt_stretch 3

So it turns out that instead of having different sized panels for the roof, they can all be the exact same size as the existing 6 panels, but there needs to be 10, and 2 of them are oriented the other way. As you can see by the folded-up version, it takes up only *slightly* more space because of the two minor rotations, and the roof can, in fact, be conveniently folded into a a *single* piece, thusly reducing tape usage in the field.

Sweet!

Mothers take note: I did *not* learn this skills in Geometry. I learned playing violent, brain-sucking games like Asteroids and Battle-Zone. So next time your 10-year-old wants to impress the hooker he's just kidnapped by running over a cop playing Grand Theft Auto, think about his education before you make judgments!

It will be interesting to see how stable the whole thing is once it's up. The angled taping of the whole thing will provide some tension, but I won't be completely convinced it will want to stand up on it's own without folding in on itself until I do a test setup in the living room tomorrow sometime. If necessary I will bring some braces to tape to the inside walls to improve stability.

In Other News, I did finish fagifying the backpack, and I have to say, it's pretty fucking gay!

ReallyFuckingGayBackpack

The likelihood of being hit from behind at night (oh my!) while riding the scooter pretty much dropped to zero.

Life is good. Now all I have to do is my packing for Flipside.

All of it, by bedtime Tuesday. Whee!

Date: 2009-05-18 12:14 pm (UTC)
From: [identity profile] worldmegan.livejournal.com
Hey, FANTASTIC! The extra triangles thing was what I was describing on the phone when we talked about fan folding, so I'm SUPER interested in how it holds up, how sturdy it is, etc. I shall be watching you cloosely. :D

Date: 2009-05-18 07:27 pm (UTC)
From: [identity profile] errantember.livejournal.com
I'm about to start cutting the new pieces now.

One reason you have so much tape, BTW, is because you haven't fanfolded yet. Fanfolding a join takes *twice* as much tape as simply taping it in the field, but after you've done it once, you never have to do it again, so it saves tape in the long run. In the short term, though, you have (in the case of my 6' stretch design):

7 wall joins x 2 sides x 4 ' = 56 '
9 roof joins x 2 sides of 4.5 ' = 81'

56'+81'= 137'

And that just for the fanfolding, without edge taping or final assembly taping. Yours will be less, at least for now, because you're not cutting into as many pieces as I am, but I definitely recommend fanfolding the parts you can as it save a lot of tape down the road, and greatly simplifies deployment.

I'm nibbling on my puppy. He's a cutie-pie!

Date: 2009-05-18 04:12 pm (UTC)
From: [identity profile] oracle-tx.livejournal.com
The spots to watch out for and tape heavily on your roof are compression along the ridgeline (with possible panel buckling), and tension where your reversed triangle points meet the outer edge. The advantage to the plain hexagon is that the tension is distributed evenly, and the compression is at the tips of the triangles. Now you have straight edges taking some compression, which aren't as strong. Maybe incorporate some rope or something into the bottom edge of the roof to handle the extra tension?

Good luck!

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