The Origami Forum

You said it couldn't be a single screw or a single nut...


I kid, I kid, I'll upload a photo of my *actual* submission once I make it from better paper

I'm not as good as others here but I've tried my best:


B-2 stealth bomber

I'm happy I've been able to imitate the plane's unique form.

^nice! I like how we had similar ideas for this month. And don't sell yourself short, we're all equals here

Oh my God, I created something for the monthly challenge . Thank you BM-origami-design for offering this super awesome theme. During this challenges I basically never find a theme that speaks to me. Know what I mean?

I'm also grateful for such restrictive rules (single square sheet). It was a real head-scratcher for me to create my model, following a harmonius folding process and getting an attractive result, without starting from a different kind of rectangle. I learned from this; you know?

Now I do gotta ask something. My model needs some weight inside. The square alone isn't enough to get the weight it needs. Can I present it to the challenge including a non-folding-material to add weight? Hope that's OK; please let me know .

The photo above shows two different realizations of a working origami roller bearing;
The yellow bearing is the inner yellow triangle and the 3 inner rolled sheets of paper making the cylinders.
The Red Bearing is folded from a single 21 inch square sheet of card stock (very light poster board). The rollers are simulated using inner fins that are folded curves. This Red one is the entry for this challenge.
The yellow bearing was my original concept before I learned that you had to use a single square.
Both will spin relatively freely on an axel. You could use any rod including a tightly rolled sheet of paper.
The yellow bearing will support considerable weight. I have used additional card stock to make arms which are strapped to the inner triangle. Arm extensions can be added by inserting additional material. I have tested the yellow bearing with three arms that were over two meters in length. The bearing still rotated freely with very minimal effort.
I also strapped 15 (1 inch) wooden blocks to test for weight. The rolled cylinders do not squash perceptibly and provide a relative smooth rotation with very minimal effort.
The red bearing depends on the strength of the paper for bearing up under weight. I believe the fins will squash inward but have not tested this bearing under substantial weight. Under moderate weight, it holds up quite well.
You can reduce the width of the red bearing by using a narrower rectangle, thus reducing the friction caused by drag. I can see using this roller on a vehicle that will roll on slight inclines. I might have to try this with either my Duesenberg or my fire truck.
For a discussion of machine design with bearing go to this link:

http://machinedesign.com/whats-differen ... bearings-1

You will notice that most bearing have many more rollers. I decided that for my “paper only” design that just 3 contact points would be most efficient.

Edg, I wanted to ask you, do you have an idea of what you'll look for while judging? I've been working on two versions of my model for the challenge: on one hand a simpler, more elegant version, and on the other a more complicated version that includes more details. I'd say they both have their merit, I think it depends on the eye of the beholder. Know what I mean?

That was why I wanted to know about what you'll be looking for .

Here's my *actual* submission for the month:

Wind-up Crane

^ Nice! I love modified cranes. Although first I thought it was a helicopter-crane.

A little tweaking and it could be made into a heli-crane, but that seems a little bit of a stretch for me for the challenge

Nice whale crane

Hey Gerardo,

There are no rules stated against showing more than one model so just show both. I am looking forward to more entries.

Thanks Firstfold . I'd still appreciate knowing what will the judge be looking for. Know what I mean ?

I also wanted to ask, what's the deadline for posting the model? I assume Edg will need a day or something to judge the entries.

You have got to see the video to appreciate the one square roller bearing - so here it is:

https://youtu.be/1rKCjjx_7dU

Lol since y'all trolls won't see the key for what it is, I reshaped the key. Better?

Lephantome92 wrote:Lol since y'all trolls won't see the key for what it is, I reshaped the key. Better?

Much better.