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| Hi all, I've found the following interesting LEGO behaviour while working on the deck for my bridge. It consists of (many) plates held together on the bottom by technic beams. There's a picture of the construction here (URL) As you can see, there's (...) (23 years ago, 16-Nov-01, to lugnet.general)
| | | | | Re: Is this bad design?
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| (...) Rosco, I haven't personally, but I know Eric Harshbarger ran into stuff like this building his Lego desk, (URL) . He mentioned how building in one direction caused a warp by the way he put down the bricks. Thanks, George (23 years ago, 16-Nov-01, to lugnet.general)
| | | | | Re: Is this bad design?
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| I suspect it's due to the way that plastic parts are made. They have to have a draft, or an angle on all vertical walls, in order for them to be removed from the mold. Over small distances, or when reinforced in a 3-d structure, this draft doesn't (...) (23 years ago, 16-Nov-01, to lugnet.general)
| | | | | RE: Is this bad design?
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| (...) Do you still need draft if the mold has ejector pins? --Bram Bram Lambrecht bram@cwru.edu www.bldesign.org (23 years ago, 16-Nov-01, to lugnet.general)
| | | | | Re: Is this bad design?
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| (...) Hmmmm. I would have though if that's the case, it's more likely the slope would be outwards toward the bottom of the plate / brick, causing the curvature to be the other way, ie sunken in the middle rather than raised. It also doesn't explain (...) (23 years ago, 16-Nov-01, to lugnet.general)
| | | | | Re: Is this bad design?
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| (...) Hmm, never heard of Bouncers called "ejector pins"? Would beer in a bottle result in a different trajectory? (23 years ago, 16-Nov-01, to lugnet.off-topic.pun)
| | | | | Re: Is this bad design?
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| Yes, even with pnuematic or hydraulic ejectors you'd still design the mold with some draft. Bram Lambrecht <bram@cwru.edu> wrote in message news:000201c16ed5$a8...1681@bl... (...) (23 years ago, 16-Nov-01, to lugnet.general)
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