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Hey Iain,
I recently did a 12-sided ferris wheel, admittedly easier, but I might
be able to help:
-=<(1)>=-
Those 45-degree-bend technic fasteners can do the trick, and here's
how. Get 10 fasteners, and 10 axles of the same length; try 6 or
8-longs for starters.
Make a 'ring' of 8 axle-fastener-axle-fasteners. Now open the ring and
stuff in two more axle-fastener pairs. the axles tend to bend a bit,
but it'll work, 36 degrees instead of 45.
-=<(2)>=-
Alternately, you could use the beautiful 36 degree geometry of boat hull
pieces:
http://extranet.telepres.com/staff/jeffe/decagon.jpg
Obviously, change the ring elements to suit, but you can put a second
ring of the same style of hinges around the inside of the ring for
really good rigidity. If you do use 10 of the wedge-plates ("3x4 wedge
plate" in MLCad) you'll get very strong rings.
And since the hole in the middle is exactly 6 across, you can easily
mount a 2x8 technic plate across it for your rotation centre.
Hope this helps.
Jeff E
Iain Hendry wrote:
>
> I'm trying to build a model of Psyclone. It's disc is made of ten seating
> modules of 4 seats each, so the whole thing isn't really a disc, its a
> decagon. Because you can't put an even number of 2-stud wide chairs on an
> even-numbered long plate (if you keep a one-stud space between the chairs
> for arms), I'm only going to have 3 seats per thing :( but I'm trying to
> figure out how to run the 10 arms that link at each "Corner" back to some
> kind of hub.
>
> I'd ref: the pics I have on coasters2k right now but since brandon's gone
> overbandwidth the site is down. I have many pictures on my site however
> (the ones on c2k are nicer though since they're all full res).
>
> http://members.rogers.com/militaryduckjock/psyclone/psyclone.html
>
> Any suggestions would be wonderful,
>
> Iain
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Message has 2 Replies:
 | | Re: Decagon?!
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| "Jeff Elliott" <jeffe@telepres.com> wrote in message news:3D7512FD.B63C11...res.com... (...) Have you ever seen an Intamin Triple-Wheel? I hate to say it, but I think the last existing one, which was "Hydra" at Lotte World in Korea, has been removed (...) (22 years ago, 4-Sep-02, to lugnet.org.ca.rtltoronto)
| | | Re: Decagon?!
|
| In lugnet.org.ca.rtltoronto, Jeff Elliott writes: (snip) (...) have been daydreaming lately about building some carnival rides having been inspired by some MOC's at BrickFest and a recent small tour of amusements parks in Ohio and Pennsylvania. Your (...) (22 years ago, 4-Sep-02, to lugnet.org.ca.rtltoronto)
|
Message is in Reply To:
| | Decagon?!
|
| I'm trying to build a model of Psyclone. It's disc is made of ten seating modules of 4 seats each, so the whole thing isn't really a disc, its a decagon. Because you can't put an even number of 2-stud wide chairs on an even-numbered long plate (if (...) (22 years ago, 31-Aug-02, to lugnet.org.ca.rtltoronto)
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