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 Post subject: Zhewei's Gear Steinmetz Solid -- Tri-CylinderPosted: Tue Jul 12, 2011 10:01 pm

Joined: Thu Jul 01, 2010 8:38 pm
Here is my latest mod, the Gear Steinmetz Solid: Tri-Cylinder.
I never heard of this shape until a couple of months ago at a SPS Zone meeting where Cornell Uni's Prof. Itai Cohen gave a talk about motion tracking of fly. I feel obligated to cite the research, I think the community here would find this interesting: http://cohengroup.ccmr.cornell.edu/rese ... ?project=1
So, three cylinders of the same radius and sufficient length placed along x, y, z axes, the intersecting is called tricylinder for obvious reason. The shape casts circular shadows in x, y, z axes which is the reason it was mention in the talk fore-mentioned.
This shape "has fourteen vertices connected by elliptical arcs in a pattern combinatorially equivalent to the rhombic dodecahedron", according to Wikipedi​a. So it is very similar to Tony Fisher's Gear Change and Sunnwinder's Gear Sculpture.
The making is straightforward truncation so I didn't take pictures, and the stickering is by far the most tedious part of the job, Sunnwinder said his Gear Sculpture literally took longer to sticker than to make (minus the stickering of course)!
Here are the pictures:
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This is actually pretty circular, the perspective takes away the look slightly
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One turn later
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Scrambled with three moves
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 Post subject: Re: Zhewei's Gear Steinmetz Solid -- Tri-CylinderPosted: Tue Jul 12, 2011 10:43 pm

Joined: Sun Jun 13, 2010 1:00 am
Great job!

So unlike a geared RD the edges have orientation, correct?

Can't wait for a video

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 Post subject: Re: Zhewei's Gear Steinmetz Solid -- Tri-CylinderPosted: Tue Jul 12, 2011 10:52 pm

Joined: Thu Jul 01, 2010 8:38 pm
Yes, since the edge pieces are part of a cylinder, they have orientations, tho it is not easy to see.

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 Post subject: Re: Zhewei's Gear Steinmetz Solid -- Tri-CylinderPosted: Wed Jul 13, 2011 4:02 pm

Joined: Thu Sep 24, 2009 12:21 pm
Location: Chichester, England
Interesting... I like it! Well done.

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