Subject:
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Re: some interesting lego building
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 12 Nov 1998 07:52:20 GMT
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Viewed:
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5097 times
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This kind of info is on LEGO ON MY MIND too:
http://www.svc.fcj.hvu.nl/brok/legomind/insights
Select Triangles in menu
There you'll see some explanatory pictures/animations as well.
Eric Brok
Greg Alt wrote in message <199811112132.NAA27218@eskimo.com>...
> After reading the robot builder's guide on:
> http://fredm.www.media.mit.edu/people/fredm/projects/6270/
>
> I had an idea... There's a really cool section about building strong
> structures with lego technics pieces, and they list the different
> possibilities for vertical braces that fit perfectly. The basic idea
> is that a lego unit is 8 mm wide and 9.6 mm high. Using that, you can
> solve for integer solutions for vertical braces.
>
> So, I got to thinking... perfect diagonal braces should be possible.
> All you do is solve for integer solutions to the following:
> x = number of horizontal lego units
> y = 3 * number of vertical lego units (because you can use 1/3 pieces)
> r = number of horizontaal units for the diagonal brace
>
> (8x)^2 + (9.6/3 * y)^2 = (8r)^2
> x^2 + (4/25)y^2 = r^2
>
> The reasonable length integer solutions are:
> y x r
> 10 3 5
> 15 8 10
> 20 6 10
> 30 5 13
> 40 12 20
>
>
>
> The y values need to be divided by 3 to get lego units.
> (e.g. 3.33, 5, 6.66, 10, 13.33) Extra 1/3's just mean that you need
> an extra 1/3 thick piece vertically.
>
>
> Thought this might be of some interest, as I've found that it is very
> easy to build something that gets ripped apart by a motor's torque or
> a bump into a wall.
>
> Greg
>
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Message is in Reply To:
 | | some interesting lego building
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| After reading the robot builder's guide on: (URL) had an idea... There's a really cool section about building strong structures with lego technics pieces, and they list the different possibilities for vertical braces that fit perfectly. The basic (...) (28 years ago, 11-Nov-98, to lugnet.robotics)
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