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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Thu, 28 Mar 2002 01:59:52 GMT
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Viewed:
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415 times
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In lugnet.build, Ross Crawford writes:
> In lugnet.build, Pedro Silva writes:
> > Hi all,
> >
> > So, now I need to devise some counter-weights. The thing is, they must allow
> > the movement of the bridge, and so far all my attempts have failed in this
> > particular point.
> >
> > Has anyone made some bridges like this, that I can use as reference? Mainly
> > for the *shape* to use.
> >
> > Some data about the bridge:
> > Span: about 64 studs (previous version was 32, but was too small to be useful)
> > Width: 18 studs
> > Height: just enough to let a metroliner pass
> > Height *to the ground*: not defined, but as low as possible. Minimum of 8-9
> > bricks, to allow the movement of the counter-weight (any solution below this
> > limit is most welcome!).
> >
> > My earlier attempts with Pneumatic cylinders failed. The use of a motor now
> > seems the cleverest option... but if you know different, please hint me
> > about it. I am really trying hard to do this bridge, and display it in
> > PLUG's August meeting.
>
> You can get LEGO weight elements (9936) from Pitsco. Very handy. Also, the
> counterweight doesn't have to go below the bridge - you can use cables with a
> pulley system, or something like this bridge at Constitution dock
> http://www.adagiomarine.com/year2001/images_hobartdocks/F00012.html. I wish I
> had a better shot of this - the bridge is in the bottom right, the
> counterweight is the large concrete block at the top of it - traffic passes
> underneath this.
>
> HTH
>
> ROSCO
LEGO weights are great but can cost some bucks, $4.95 a pair (2K2 catalog)
and that excludes shipping. (Save the money for Technic beams) Low cost
alternative, and I've heard the train guys mention this, roll of pennies.
Just make a container to hold them and you can put as many or as little as
you like. And, you can make the container to whatever shape or size fits
your needs best.
Pass along: I went to a local Borders in town and found a great bridge book
titled "30 Bridges" by Matthew Wells (ISBN 0-8230-5354-7). Many great
works, list is US$50 but less online.
Adr.
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Message is in Reply To:
 | | Re: Drawbridge help needed!
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| (...) You can get LEGO weight elements (9936) from Pitsco. Very handy. Also, the counterweight doesn't have to go below the bridge - you can use cables with a pulley system, or something like this bridge at Constitution dock (URL) I wish I had a (...) (23 years ago, 28-Mar-02, to lugnet.build)
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