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 21:40:54 GMT
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Viewed:
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2613 times
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> > 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.
According to my dictionary a dome is any curved or vaulted roof. It
does not have to be circular, or even regular. The fact that something
doesn't exist in reality is hardly a reason to reject a name for what is
a toy.
> > 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.
According to my book on Russia and the Winter Palace, there is no such
thing as a standard onion dome, they squashed them to fit as necessary.
> Compare to the panel quarter cylinder. That actually IS 1/4 of
something.
Agreed. It is a quarter of what you get if you put 4 of them together,
as is this part half of what you get if you place two of them together.
> > 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.
Your arguement is flawed by assuming that domes are circular, or even
elliptic. They are not. A dome is any curved roof. This part is quite
clearly a curved roof. Place two back to back and you get a whole
curved roof, therefore one must be (by mathematical definition) half of
the whole.
OK, so what would you call it that enables a user to locate the part?
And I still need to know the Category for it
thanks
William
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