Subject:
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Re: Drawbridge help needed!
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Newsgroups:
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lugnet.build
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Date:
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Fri, 29 Mar 2002 01:48:10 GMT
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Viewed:
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741 times
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In lugnet.build, Ross Crawford writes:
> In lugnet.build, Pedro Silva writes:
> >
> > The Hobart bridge looks close to what I'm trying to do. Is the concrete
> > block firmly connected to the bridge itself (ie, no relative motion is
> > possible between the two), or differently?
>
> From the side it looks a bit like this:
>
> +---+
> | |
> | | <- counterweight
> | |
> +---+---+ <- hinge
> | |
> \ |
> \ |
> --------------------------------- <- bridge deck
>
> The sloped bit on the left is actually 1/4 circle, with teeth (curved rack),
> which is used to move the bridge. This would be difficult with LEGO, but
> could be donw with a lever or similar.
(You are so right, ASCII art is difficult to see in Lugnet with IE5!)
I think I got the idea. Curiously, I'm designing a garage door that
resembles this, but in a different position... :-)
There is a problem with this design, though: how will the deck tip be able
to move *up* without moving *forward*, and thus hitting the track on the
margin? So far, in all my attempts to do this train bridge I used the hinge
at the same level as the track. Can it be done differently, and work?
Pedro
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Message is in Reply To:
 | | Re: Drawbridge help needed!
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| (...) From the side it looks a bit like this: +---+ | | | | <- counterweight | | +---+---+ <- hinge | | \ | \ | ---...--- <- bridge deck The sloped bit on the left is actually 1/4 circle, with teeth (curved rack), which is used to move the bridge. (...) (22 years ago, 29-Mar-02, to lugnet.build)
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