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 Post subject: Helicopter Cube
PostPosted: Sun Jul 12, 2009 11:52 pm 
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Video: http://www.youtube.com/watch?v=zcKx0iJUn0Y

OK, I did some more tweaking of the puzzle, got a new core cast, and now it turns better than ever. I was also able to sticker it (by hand :lol: ) which actually took me a lot longer than I thought. It looks very nice now though and the movement is continuing to improve. I also got to use the fancy camera today so the pics also look sweet :D

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--------------OLD POST-----------------------

Whew. This puzzle has given me quite a bit of trouble from the very beginning. But I am now the happy owner of a functional Helicopter cube. The movement is not quite top notch but it has been improved a LOT since I finished casting it. I literally spent at least 10 hours tweaking, adjusting, and recasting this thing and now I think it's finally getting somewhere.


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Yes, it jumbles.

And also, a puppy

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The main design flaw is the corner is very very weak and prone to breaking. Luckily I was not in this alone, and VeryWetPaint gave me some suggestions to strengthen them. I ended up recasting all 8 corners with a finishing nail embedded in the weak area. The puzzle is much much less fragile now and I am finally somewhat satisfied with it.

I will have a video of the movement up as soon as I can put it back together. Yes, the core stripped AGAIN and this time I was even using the correct type of screw! :roll: It was just me being stupid, and luckily this was the cast core and not the printed one. Still I have to take the thing apart again (after getting the tension almost perfect).

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Last edited by Garrett on Mon Jul 13, 2009 11:16 pm, edited 2 times in total.

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 Post subject: Re: Helicopter Cube
PostPosted: Sun Jul 12, 2009 11:57 pm 
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Two thumbs up GREAT WORK! :D

Success is a wonderful feeling isn't it?

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 Post subject: Re: Helicopter Cube
PostPosted: Sun Jul 12, 2009 11:59 pm 
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Print To 3D wrote:
Two thumbs up GREAT WORK! :D

Success is a wonderful feeling isn't it?


Thanks, and yes it especially feels good after a few failures :lol:

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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 12:08 am 
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Joined: Wed Sep 10, 2008 6:22 pm
It looks great! I've always loved the Helicopter Cube. Cute puppy.

- Billy

PS: Is it possible to make a Helicopter Cube that doesn't jumble?


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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 1:39 am 
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Location: Evanston, IL
lonogod: Depends on what you mean by "doesn't jumble". I'm pretty sure that my own attempt at a helicopter cube is able to jumble, but if you try, it starts falling apart after a few shape-changing turns. One of these days, I'll get around to trying again.

Good job, Garret. I look forward to seeing the video.

-π (Eitan)

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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 3:07 am 
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A video showing the movement: http://www.youtube.com/watch?v=zcKx0iJUn0Y

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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 4:52 am 
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Look good :D
waited finishing

I silllll cant understand its mechanism.

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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 9:44 am 
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pirsquared wrote:
Depends on what you mean by "doesn't jumble". I'm pretty sure that my own attempt at a helicopter cube is able to jumble, but if you try, it starts falling apart after a few shape-changing turns. One of these days, I'll get around to trying again.

I thought that the meaning of jumbling on a Helicopter Cube was pretty obvious. At about the 40 second mark in the video is what I meant by jumbling. Make a slight turn with one edge and then make another turn with a different edge. Is there a way to prevent that from happening? Thanks.

- Billy


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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 10:46 am 
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Location: Houston/San Antonio, Texas
lonogod wrote:
I thought that the meaning of jumbling on a Helicopter Cube was pretty obvious. At about the 40 second mark in the video is what I meant by jumbling. Make a slight turn with one edge and then make another turn with a different edge. Is there a way to prevent that from happening? Thanks.

- Billy


This is just a shot in the dark and I don't really feel like pursuing the idea at this time, but here's my thoughts:

Some jumbleable puzzles are made from a rhombic dodecahedron. They could also be made from a rhombic tricontahedron. These two shapes are made by combining an archimedian solid with its dual. But this only covers 4 of 5 solids. The final solid is the tetrahedron and combining it with its dual (another tetrahedron) gives a cube. Typically the rhomic faces do not jumble if rotated 180 degrees and do jumble if rotated such that one edge overlaps an adjacent edge. Now a cube has square faces (and squares are technically still rhombic in nature) A cube can be mixed with half turns only or 90 degree turns. Relate this to a Mastermorphix and you can see how a cube puzzle can in some sense be considered jumbleable when using 90 degree turns. So it seems to me that if you can create a cube puzzle that restricts movement to only the "non-jumbleable" 180 degree turns, you ought to be able to do that with other puzzles that implement a rhombic faced core.

But wait! A 180 only cube has been made before here

So, following the pattern, I believe a similar concept could be employed to accomplish exactly what you ask - a non-jumbling helicopter cube (or rua or toru or 24cube or other rhombic cored puzzles yet to be made 8-) )

Again, I haven't looked into this idea anymore than I just described so I'm not certain it's possible....

Peace,
Matt Galla


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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 11:50 am 
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Thanks for that explanation. I was aware of most of that. I would imagine that in order to make it unjumbleable one would have to do the same to the inner mechanism of a Helicopter Cube as Hidetoshi did with the outer faces of that cube you linked to. He also speaks of a puzzle that looks like a normal 3x3x3 cube but acts the same as his cube. I think that's what would have to be done with the Helicopter Cube. Tweaking the mechanism and then building on top of that to make it look like a normal Helicopter Cube. Thanks again.

- Billy


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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 3:34 pm 
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Location: MA, USA
How about taking the cheat route and just not doing "jumbling" turns. :lol:

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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 3:39 pm 
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SaiyanKirby wrote:
How about taking the cheat route and just not doing "jumbling" turns. :lol:

:lol: That just might work...GENIUS! :lol:

- Billy


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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 5:00 pm 
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great job!!!
ive always loved the helicopter cube!

nice job on casting!
i know how it feels to have to recast a puzzle

-Clay

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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 6:55 pm 
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Location: Evanston, IL
lonogod wrote:
pirsquared wrote:
Depends on what you mean by "doesn't jumble". I'm pretty sure that my own attempt at a helicopter cube is able to jumble, but if you try, it starts falling apart after a few shape-changing turns. One of these days, I'll get around to trying again.

I thought that the meaning of jumbling on a Helicopter Cube was pretty obvious. At about the 40 second mark in the video is what I meant by jumbling. Make a slight turn with one edge and then make another turn with a different edge. Is there a way to prevent that from happening? Thanks.

- Billy


I was being a little cynical there. I had no intention of starting up the "jumbling" debate.

Garret: The movement looks 50 times better than that of my own Helicopter Cube. Great job!

-π (Eitan)

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Buy a Radio Cube 3! Only $150 at Eitan's Shapeways Shop
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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 8:32 pm 
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I just have to say that is one great puppy.


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 Post subject: Re: Helicopter Cube
PostPosted: Mon Jul 13, 2009 11:17 pm 
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Location: Orange County, CA
First post updated with new pics.

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 Post subject: Re: Helicopter Cube
PostPosted: Tue Jul 14, 2009 2:21 am 
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its looks good but you should have spent more time sanding and smoothing
before you stickered it

smoot stickers add a nice aesthetic to puzzles

that said
great job!

-Clay

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Clay: Barrel cube?...Why? It's such a Geometrical contradiction...I don't understand[/size]
Eva:?


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 Post subject: Re: Helicopter Cube
PostPosted: Tue Jul 14, 2009 8:54 am 
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What's up with that tiny little red piece stuck to one of the blue stickers? That is bugging me to death! :P

- Billy


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 Post subject: Re: Helicopter Cube
PostPosted: Tue Jul 14, 2009 9:17 am 
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Great work, Garrett! I love this puzzle.


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 Post subject: Re: Helicopter Cube
PostPosted: Tue Jul 14, 2009 11:11 am 
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lonogod wrote:
What's up with that tiny little red piece stuck to one of the blue stickers? That is bugging me to death! :P

- Billy


Its just the corner of a red sticker that I was cutting.

And yes I do realize this is a rather rough prototype. I'm just happy it works. The second one will be nicer.

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