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In lugnet.loc.it, Manfred Moolhuysen writes:
> In lugnet.loc.it, Pedro Silva writes:
> > #6 - Do you have any pictures of the drawbridges? How are they operated
> > (gears, pneumatic)? How does the track maintain conductibility?
>
> There where no drawbridges. There was a swivel-bridge (rotating in a
> horizontal plane) operated with a micro motor and gears. I haven't seen a
> close-up picture of it. It did operate, but it wasn't strong enough to
> overcome the friction of the bearings when it reached an almost closed
> position. It needed a helping finger to begin opening and to finish closing.
> The moving part had an extra train track lead attached to power this
> section. One of the two gaps of this bridge was also a electrical seperation
> between (one of) the main loop and the train yard, allowing independed
> operations on both of them.
You wouldn't happen to know about anyone who has successfully built a
drawbridge of, say, some 64 studs (32 + 32)? With double tracks...
You see, if I were to send some creation for display at "next Zwolle", I'd
like to try that. I say "send" because LEGO travels cheaper than people... :-)
Pedro
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Message is in Reply To:
 | | Re: Zwolle
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| (...) There where no drawbridges. There was a swivel-bridge (rotating in a horizontal plane) operated with a micro motor and gears. I haven't seen a close-up picture of it. It did operate, but it wasn't strong enough to overcome the friction of the (...) (23 years ago, 31-Oct-01, to lugnet.loc.it, lugnet.loc.pt, lugnet.loc.nl)
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