Subject:
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Re: automated train drawbridge
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 29 Jan 2004 21:52:50 GMT
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Viewed:
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1233 times
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In lugnet.announce.moc, Lewis Valentine wrote:
> Here is my latest. It is a fully automated train bridge.
>
> (Sorry the photos are not the best. It is hard to take pictures in my basement.)
>
> It is fully automated. Meaning we will be able to run the rcx and the bridge
> will happen periodically during a train show without human intervention.
>
> The rcx will raise the bridge once about every 20 minutes. It will wait until
> trains are not on the bridge. Any trains that are coming to the bridge when it
> is up will be stopped.
>
> It contains 8 homebrew light sensors.
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=641525
>
> Here is the bridge when it is down. (there is another bridge behind it)
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=641515
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> And Up
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=641523
>
> Other Pictures
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=70673
Wow, a double-leaf bascule bridge! That's an impressive piece of engineering
(no pun intended).
Do you have counter-weights hidden under the piers? And we *need* to see some
pictures of the lifting mechanism!
How much does it sag when a train crosses the bridge? I'm guessing the magnets
are to help keep the two sections lined up properly?
JohnG, GMLTC
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Message has 1 Reply:
 | | Re: automated train drawbridge
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| (...) Kind of long but here is some more info on the bridge. (...) I do have counter-weights. They are slung under the table. We can get by this at ngltc because our water tables are lower than the other tables. Here is a picture of the (...) (20 years ago, 29-Jan-04, to lugnet.trains)
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Message is in Reply To:
| | automated train drawbridge
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| Here is my latest. It is a fully automated train bridge. (Sorry the photos are not the best. It is hard to take pictures in my basement.) It is fully automated. Meaning we will be able to run the rcx and the bridge will happen periodically during a (...) (20 years ago, 29-Jan-04, to lugnet.announce.moc, lugnet.trains, lugnet.robotics) !
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