Subject:
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trying to guess the stud spacing by measuring bricks
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 24 Aug 1999 23:25:38 GMT
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Viewed:
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454 times
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In lugnet.faq, Adam Howard writes:
> [...] I used a caliper accurate to .001inches and measured the
> > thickness of ten walls from various parts. The measurements ranged between
> > 0.062 and 0.058 inches or 1.5748mm to 1.4732mm.
> [...]
> After taking some more samples I have decided I need to take a lot more.
> So far I've measured about 20 parts varying in size from a 2x2x1 to a 1x6x1
> as well as odd parts like a horse's hooves. What I have found is contrary
> to my original conversion and seems to support the 1mm=2.5LD units more,
> but not quite. [...]
The reason your approach doesn't work is because all LEGO parts are
deliberately manufactured with a very tiny gap allowance on each
contact-surface dimension. If this weren't the case, the bricks would not fit
well when dirty or marred. It might help you to re-read tha paragraph I wrote
about this issue:
> It is also worthwhile to note that LEGO bricks are always made
> a little smaller than this dimension would suggest. For example, the
> length of a 2x4 brick is a little less than 4 times 7.986 millimeters.
> The length is diminished slightly so that there will be a small gap when
> bricks are stacked next to each other. This gap allows for dust, marred
> surfaces and other imperfections. If the gap were not there the bricks
> would tend to push each other apart and the overall construction would
> be less strong.
As a result, if you want to measure the stud spacing accurately, you can only
do so by constructing some type of large construction out of multiple
overlapping bricks, such as a long horizontal wall. That is how I got my value
of 7.986 +- 0.002 millimeters.
- Robert Munafo http://www.mrob.com/
LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13
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Message has 2 Replies:
 | | Re: trying to guess the stud spacing by measuring bricks
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| I know you went several hundred studs in length if I recall, but is there any chance that the stud center spacing is actually intended to be 8.000 mm ??? This is not intended as a slur against your measurement technique, but an honest question. (...) (25 years ago, 24-Aug-99, to lugnet.cad.dev)
| | | Re: trying to guess the stud spacing by measuring bricks
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| Thanks Robert! That did the trick. It had been awhile since I had read your earlier post and I completely forgot about the standard gap. Thanks, Adam Robert Munafo <munafo@gcctechNO.SPAMcom> wrote in message news:FGzt2q.1op@lugnet.com... (...) (...) (25 years ago, 25-Aug-99, to lugnet.cad.dev)
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