Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Interesting Octagon Shape
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Newsgroups:
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lugnet.cad.dat.ideas
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Date:
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Wed, 25 Oct 2000 12:28:48 GMT
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Viewed:
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5695 times
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Jamie (my 12yo son) discovered an interesting shape, using plate hinges. He
built an octagonal shape, by putting hinge plates <part: 4275> and <part:
4276> onto a z-bracket <part: 6087>. He repeated this structure eight
times, and fit it all together into an octagonal shape. In the attached DAT
file, I've replaced the bracket with plates and hinges, to make things a
little simpler.
He also spent two days looking for enough hinge plates. But, that's a story
for lugnet.storage.
I was examining his construction, verifying whether everything fit exactly,
or if it was a "close enough" build, with the leeway in the fit of the
hinges allowing him to make it go. Amazingly, it is an exact fit. :)
The triangle formed by the two hinge plates, with the hypotenuse being the
line between the two hinge-points, and the legs being the horizontal and
vertical components, has sides 48/20/52.
If you keep building, placing another hinge plate 48LDU up, and 20LDU out,
you can add another ring to your octagon.
Another implication: to make a fixed 45-degree angle in a construction, you
can use hinge plates to determine the angle. Just keep spacing them
(vertically) by 48LDU (or 2 plates and a brick).
To reinforce the connection, you can use *lots* of hinge plates.
Steve
0 FILE Untitled.dat
0 Octagon with Hinge Plates
0 Name: Untitled.dat
0 Author: Jamie Bliss
0 Unofficial Model
0 ROTATION CENTER -1 0 4 1 "Custom"
0 ROTATION CONFIG 1 1
1 0 0 -68.426 0 1 0 0 0 1 0 0 0 1 Segment.dat
1 0 -48.376 -48.79 0 0.707107 0.707107 0 -0.707107 0.707107 0 0 0 1 Segment2.dat
1 0 -69.426 -1.001 0 0 1 0 -1 0 0 0 0 1 Segment.dat
1 0 -49.79 47.376 0 -0.707107 0.707107 0 -0.707107 -0.707107 0 0 0 1 Segment2.dat
1 0 -2.001 68.426 0 -1 0 0 0 -1 0 0 0 1 Segment.dat
1 0 46.376 48.79 0 -0.707107 -0.707107 0 0.707107 -0.707107 0 0 0 1 Segment2.dat
1 0 67.426 1.001 0 0 -1 0 1 0 0 0 0 1 Segment.dat
1 0 47.79 -47.376 0 0.707107 -0.707107 0 0.707107 0.707107 0 0 0 1 Segment2.dat
0
0 FILE Segment.dat
0 Segment
0 Name: Segment.dat
0 Author: Steve Bliss
0 Unofficial Model
0 ROTATION CENTER 0 0 0 1 "Custom"
0 ROTATION CONFIG 0 1
1 0 0 0 -10 1 0 0 0 1 0 0 0 1 3022.DAT
1 4 0 -8 0 1 0 0 0 1 0 0 0 1 4275.DAT
1 1 0 -8 -20 -1 0 0 0 1 0 0 0 -1 4276.DAT
1 0 0 -16 -10 1 0 0 0 1 0 0 0 1 3022.DAT
1 7 0 -40 0 1 0 0 0 1 0 0 0 1 3004.DAT
1 0 0 -48 0 1 0 0 0 1 0 0 0 1 3023.DAT
1 1 -20 -56 0 -1 0 0 0 1 0 0 0 -1 4276.DAT
1 4 20 -56 0 1 0 0 0 1 0 0 0 1 4275.DAT
1 0 0 -64 0 1 0 0 0 1 0 0 0 1 3023.DAT
0
0 FILE Segment2.dat
0 Complement of Segment.dat
0 Name: Segment.dat
0 Author: Steve Bliss
0 Unofficial Model
0 ROTATION CENTER 0 0 0 1 "Custom"
0 ROTATION CONFIG 0 1
1 0 0 0 -10 1 0 0 0 1 0 0 0 1 3022.DAT
1 4 0 -8 -20 1 0 0 0 1 0 0 0 1 4275.DAT
1 1 0 -8 0 -1 0 0 0 1 0 0 0 -1 4276.DAT
1 0 0 -16 -10 1 0 0 0 1 0 0 0 1 3022.DAT
1 7 0 -40 0 1 0 0 0 1 0 0 0 1 3004.DAT
1 0 0 -48 0 1 0 0 0 1 0 0 0 1 3023.DAT
1 1 -20 -56 0 -1 0 0 0 1 0 0 0 -1 4276.DAT
1 4 20 -56 0 1 0 0 0 1 0 0 0 1 4275.DAT
1 0 0 -64 0 1 0 0 0 1 0 0 0 1 3023.DAT
0
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