Subject:
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Re: Onion Dome (part 44511) from Orient Expedition sets
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Sun, 16 May 2004 21:25:38 GMT
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Viewed:
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7023 times
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In lugnet.cad.dat.parts, William Howard wrote:
> I would have to disgree. The part is half a dome - it takes two parts
> to make a complete dome,
I would argue that two parts back to back make something that is not an actual
dome, but rather some shape never seen in reality.
> therefore one part is only half of the dome.
>
> The fact that the resulting shape is not half of a circle is largely
> irrelevant IMHO.
I would disagree, it is in fact highly relevant. If I take an idealised onion
dome and divide it in half, I do not get this part.
Compare to the panel quarter cylinder. That actually IS 1/4 of something.
> Even if you remove the "extra" bit at the open side,
> the part is not circular. It varies from circular at the top, through
> an series of increasing and then decreasing elipses, and back to
> circular (but offset from the top circle by 20LDU) at the bottom.
>
> You can see this placing two at right angles and then comparing the z=0
> and x=0 plane profiles
All the above is true, and very nicely supports my argument that this part is
not half a dome. (thanks!) Calling it 1/2 would lead the user to believe that
perhaps, if they place two back to back they would get a complete dome. They
will not.
One of the parts library issues that I think is very important going forward is
to get nomenclature right. There are enough errors and mislabeled things and
theme specific terms already as it is, I would prefer not to see us introducing
additional ambiguity or error.
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