Subject:
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Re: part weight inventory
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Newsgroups:
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lugnet.inv
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Date:
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Mon, 18 Sep 2006 00:41:25 GMT
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Viewed:
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3870 times
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In lugnet.inv, David Eaton wrote:
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In lugnet.inv, Ross Crawford wrote:
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Bricklink records the weight of many LEGO parts, however it’s only
approximate because two items of the same part can have different weights.
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We discussed average piece weight in a recent thread:
http://news.lugnet.com/general/?n=52887
I actually collected a lot of BrickLink’s data in mid august. IIRC, I found in
general that the BL weight was a little bit too heavy on average, when
comparing to a few other sources of weights. I found some data that someone
had gathered using a chemistry scale for measuring a few elements, as well as
another source where someone had weighed a bunch of pieces (in a spreadsheet
posted to LUGNET I believe).
I’m not sure where BL gets their weight data, but I’m assuming that it’s from
sellers who have made approximations for them, possibly from shipping weights?
If that were the case, it would certainly explain the extra weight. Otherwise,
I dunno. I wonder if it’s kosher to post a list of piece weights online,
gathered from mostly BL data. Hm. I guess probably not.
DaveE
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We assume, but cannot verify, that the weight submissions we get on BrickLink
have actually been weighed on a scale. Some submitters add notes with their
submissions such as “100 white bricks weighed on a +/- .01g scale” or something
like that. However not everyone does that and we have no way of verifying the
acccuracy of any submissions. For that reason we suggest that the weights be
used as a guideline, and no guarantee is made as to their accuracy.
Also keep in mind that those who submit weights are those who have the parts, so
sellers probably are more highly represented as weight contributors. This
could lead to a tendency to round to the high side of weight measurements so
they don’t get caught underestimating a shipment weight. But this is just a
speculation on my part.
As for posting piece weights that you have gleaned primarily from BL data, I
personally don’t see a problem, although you may want to state the source. And
you also may want to use any other sources of weight info you can find and
average them out if possible for greater accuracy.
Maggie C.
BL Catalog Admin
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Message has 1 Reply:
 | | Re: part weight inventory
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| (...) That was my guess too, but yeah, no way to verify. Unless of course someone wants to take a high-precision scale to every Lego element out there and post the results. Or, if the Lego Company wants to tell us all what the weights are! (...) I (...) (18 years ago, 18-Sep-06, to lugnet.inv)
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Message is in Reply To:
| | Re: part weight inventory
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| (...) We discussed average piece weight in a recent thread: (URL) actually collected a lot of BrickLink's data in mid august. IIRC, I found in general that the BL weight was a little bit too heavy on average, when comparing to a few other sources of (...) (18 years ago, 17-Sep-06, to lugnet.inv)
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