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 CAD / LDraw Files / Parts / 5257
5256  |  5258
Subject: 
Re: Onion Dome (part 44511) from Orient Expedition sets
Newsgroups: 
lugnet.cad.dat.parts
Date: 
Sun, 16 May 2004 21:25:38 GMT
Viewed: 
2575 times
  
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.



Message has 1 Reply:
  RE: Onion Dome (part 44511) from Orient Expedition sets
 
(...) parts (...) actual (...) 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. (...) (20 years ago, 16-May-04, to lugnet.cad.dat.parts)

Message is in Reply To:
  RE: Onion Dome (part 44511) from Orient Expedition sets
 
I would have to disgree. The part is half a dome - it takes two parts to make a complete dome, 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. Even if you remove the (...) (20 years ago, 16-May-04, to lugnet.cad.dat.parts)

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