Subject:
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Re: A question about Insulation between tracks
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 20 Mar 2001 14:12:37 GMT
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Viewed:
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828 times
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I made a Reverse Loop, you can find it at
http://legochina.virtualave.net/MOCs/RCXReverseLoop.gif
Zhengrong
Martin Legault wrote:
> In lugnet.trains, Larry Pieniazek writes:
> > In lugnet.trains, Zhengrong Zang writes:
> > > My friends asked me a question about Insulation between tracks, I am not
> > > sure if it will be a problem. Base on some expert's idea, we can
> > > insulated tracks using adhesive tape as follow:
> > > |----|
> > > + ===========O======= -
> > > - ===========O======= +
> > >
> > > |----| is motor
> > > === is tracks
> > > O is insulation
> > >
> > > The problem is when motor is on the two parts of insulated tracks, and
> > > the current is opposite as above, does the short circuit happen? How can
> > > we avoid it?
> >
> > Never allow it to happen. While for LEGO it's not a big deal, in regular MR,
> > it is, it can burn out power packs. Make sure you switch your isolated
> > segment in a way that it doesn't occur (you need an isolated segment which
> > is switchable, made by a PAIR of gaps spaced some distance apart, not just
> > one set of gaps)... make sure your isolated segment is long enough to span
> > the longest train you are likely to want to reverse (or at least the longest
> > locomotive lashup)
> >
> > ++Lar
>
> I have to had that your desing will not allow a train to move very far. Even if
> you do 2 gap like Larry write, your train moving from left to rigth, when it
> will go to the section of reverse polarity will simply start go backward until
> it reach the left section again where it will go forward again to the rigth
> section to reverse back.... thus creating a "dancing" train.
>
> to create a reversing loop you need a section of track long enough insulated
> from the loop on boot side and when your train is on that section you reverse
> the polarity of the main portion of the track.
>
> ===========================
> / /
> | |
> | /
> \==o=========0=
> ^
> insulated
> portion
>
> you can use the LEGO polarity switch that some technic set had in the 90' or do
> it with mindstrom.
>
> Martin
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Message is in Reply To:
 | | Re: A question about Insulation between tracks
|
| (...) I have to had that your desing will not allow a train to move very far. Even if you do 2 gap like Larry write, your train moving from left to rigth, when it will go to the section of reverse polarity will simply start go backward until it (...) (24 years ago, 20-Mar-01, to lugnet.trains)
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