Subject:
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Re: Even more Wow!! for your buck!!! was Re: Woo Hoo!!!!! (part deux...)
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Newsgroups:
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lugnet.org.ca.rtltoronto, lugnet.trains
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Date:
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Mon, 2 Jun 2003 17:34:38 GMT
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Viewed:
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1064 times
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In lugnet.org.ca.rtltoronto, Brian H. Nielsen wrote:
> In lugnet.org.ca.rtltoronto, Larry Pieniazek wrote:
> > In lugnet.org.ca.rtltoronto, David Koudys wrote:
> >
> > <snip>
> >
> > Regarding reverse loops and DCC I seem to recall that it's possible to
> > automate them so you don't have to cut gaps that the motor has to coast
> > across
> >
> > See this track diagram
> >
> > http://members.shaw.ca/sask.rail/dcc/loop.html
>
> I'm not up on DCC, but with normal track it is normally done by having the
> loop divided into 2 power blocks,
That diagram is divided into two blocks. One for the approaches, and one for the
reverse loop itself. That's standard wiring, been done that way since I was a
wee lad, there's no need to divide the reverse loop itself into two blocks.
With conventional control (for example the old ATLAS line of components) you
reverse the loop block to match which way the train enters and while the train
is in the block, you reverse the approach block.
> rather than one as in the above diagram. With
> 3 power blocks you can always switch the block the train is heading toward to be
> compatible with the block it is in so there is never a gap to cross. Once the
> engine has crossed into a new block the trailing block is free to be changed and
> there is time to set the leading block.
>
> I'm sure you know all that, it's an old technique, but wouldn't that work
> here? Or is there something about DCC which prevents using it? Or does DCC
> somehow reduce the number of blocks needed, thus simplifying the layout?
>
> Brian H. Nielsen
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