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In lugnet.trains, Cary Clark writes:
> I've constructed the 9V point centerline geometry through trial and error.
...
After some conversation with Ludo Soete, I created a geometric construction
to prove that the 9V point curve can be created from the same circle radius
as the 9V track, without any straight sections. I did this by modeling this
Track Designer construction:
http://www.brickshelf.com/gallery/cary/track-geometry/td.bmp
Here's the model, and the results:
http://www.brickshelf.com/gallery/cary/track-geometry/construction.gif
Note that since 'C' equals 80, the two circles just touch but do not overlap
(hence, there's no straight between the curves).
Cary
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Message is in Reply To:
 | | 9V point geometry
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| I've constructed the 9V point centerline geometry through trial and error. What I came up wasn't very intuitive, so it's probably wrong. (I don't think there's an LDraw representation of the point yet, although it looks like Ludo Soete is working on (...) (21 years ago, 8-Feb-03, to lugnet.trains, lugnet.cad.dat.parts)
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