Subject:
|
Re: Is this bad design?
|
Newsgroups:
|
lugnet.general
|
Date:
|
Fri, 16 Nov 2001 20:51:18 GMT
|
Viewed:
|
528 times
|
| |
|
|
In lugnet.general, Adrian Drake writes:
> 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 show up. However, when you build a long
> distance in a straight line (as your bridge decks are), the small angles in
> each vertical wall (it may be as small as 1/2 degree) will add up to cause
> bowing in the overall structure.
>
> But that's just a theory.
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 the horizontal "bending" - the plates on top actually
have small gaps between them - it seems that connecting them with a plate makes
that gap slightly larger than it is with a brick. Maybe it's just that the
studs on plates are slightly different from those on bricks?
ROSCO
|
|
Message is in Reply To:
 | | Re: Is this bad design?
|
| 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)
|
7 Messages in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
