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Gyro expanded truncated cube

 
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falmbeau



Joined: 02 May 2010
Posts: 2

PostPosted: Sat Dec 04, 2010 3:25 pm    Post subject: Gyro expanded truncated cube Reply with quote

Hi,

I'm fascinated by the Stewart Toroids, and guided by the library in Great
Stella I built this gyro expanded truncated cube with Polydron.



Larger image:
http://i1208.photobucket.com/albums/cc364/falmbeau/Zi6_0152.jpg

Best Wishes,
James
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Peter Kane



Joined: 25 Oct 2009
Posts: 79
Location: S.E England

PostPosted: Tue Dec 07, 2010 6:12 pm    Post subject: Reply with quote

James,

I've never really paid them much attention, but having read your post, I thought I'd take a look with Stella (it great for just playing around, isn't it ?) and I can see the attraction.

I'd never heared of Polydron before (see what a sheltered life I lead ?), so I took a look at their website. It seems a bit expensive, given that it is made of platics, but I suppose it a niche market. I might get a bucket for my daughter.

Pete K
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falmbeau



Joined: 02 May 2010
Posts: 2

PostPosted: Tue Dec 07, 2010 7:03 pm    Post subject: Reply with quote

Peter Kane wrote:

I'd never heared of Polydron before (see what a sheltered life I lead ?), so I took a look at their website. It seems a bit expensive, given that it is made of platics, but I suppose it a niche market. I might get a bucket for my daughter.


Hi.

It is used a lot in schools in the UK, I heard about it through my better half who is a teacher.

I have been able to find new sets at 50% - 75% of full price by watching eBay UK for a while.

The open-centred pieces, called Frameworks, are cheaper than the filled-in ones. They are also slightly thinner so they can be hinged to a tighter dihedral angle (about 42 degrees) before starting to separate.
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Peter Kane



Joined: 25 Oct 2009
Posts: 79
Location: S.E England

PostPosted: Fri Dec 10, 2010 10:16 am    Post subject: Reply with quote

Oh dear, I've been tempted...

Thanks for the hint: it was half price on ebay, although I did end up spending twice as much as intended.... Still, you can't pass up a bargain, can you ?

Its, for my daughter Maragaret, who designed my avatar (It is actually a Father's day card).

Cheers,

Pete K
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robertw
Site Admin


Joined: 10 Jan 2008
Posts: 395
Location: Melbourne, Australia

PostPosted: Fri Dec 10, 2010 1:27 pm    Post subject: Reply with quote

There are quite a few similar products around. The only ones I've had direct contact with are GeoShapes, aka GeoAustralia, and GeoMag. The former snaps together while the latter is magnetic. Both have hollow transparent faces with panels that fit in, which makes them a bit different from Polydron, so it just depends what you like.
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Peter Kane



Joined: 25 Oct 2009
Posts: 79
Location: S.E England

PostPosted: Fri Dec 10, 2010 2:15 pm    Post subject: Reply with quote

Rob,

Thanks, I'll check out GeoShapes. We already have Geomag, which I like a lot, but nothing quite compares to the "fun" of a cardboard model.

Incidentally, can Stella help you to build a model like the one you use as your avatar ?

Cheers,

Pete K
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robertw
Site Admin


Joined: 10 Jan 2008
Posts: 395
Location: Melbourne, Australia

PostPosted: Sat Dec 11, 2010 1:22 am    Post subject: Reply with quote

I agree that paper models are ultimately the best, but they do take longer to make of course.

And yes, I used Stella to create the model in my avatar and print its nets. Read about that model here:
http://www.software3d.com/StelSSTD.php

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Ulrich



Joined: 29 Jan 2008
Posts: 87
Location: Germany

PostPosted: Sat Dec 11, 2010 10:22 am    Post subject: Reply with quote

Alex Doskey, who is no 4 in the memberlist, has done a lot of work on the Stewart Toroids and he also deals with "Jovo Toys".

Ulrich
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Peter Kane



Joined: 25 Oct 2009
Posts: 79
Location: S.E England

PostPosted: Tue Dec 14, 2010 7:39 am    Post subject: Reply with quote

Rob,

Thanks for the info. I'll put in on my ever-increasing list of coveted polyhedra.

Pete K
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