Subject:
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Re: 'Dog Bone' - definition
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Newsgroups:
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lugnet.trains
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Date:
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Sat, 10 Mar 2001 01:13:41 GMT
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Viewed:
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2249 times
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In lugnet.trains, Sonnich Jensen writes:
>
> SRC <LEGOArches@yahoo.com> wrote in message news:G9sIqE.35@lugnet.com...
> > In lugnet.trains, James Brown writes:
> > > In lugnet.trains, Larry Pieniazek writes:
> > > > In lugnet.trains, John Gerlach writes:
> > > > > In lugnet.trains, Eric Kingsley writes:
> > > > > > I think it would be nice if we could run trains on a layout in a
> > > > > > "Dog Bone" configuration (I.E. 2 reversing loops connected by a
> > > > > > length of staight track) with some sort of RCX style control to
> > > > > > work the switches and power going through the loops.
> > > > > >
> > > > > > This would allow us to do a very long and narrow layout as
> > > > > > opposed to the more traditional square/rectangle with a loop of track.
There is no rule to say that a dog bone style layout should be in the shape
of a dog-bone! A far more common MR arrangement is to run the centre double
track section around a room or double back over itself at a higher level.
You get more running track within a given space yet it still provides you
with the most appealing aspect of this design, that the trains appear to be
going somewhere and then returning (rather than 'chasing their tails').
My favoured solution is to hide the end loops in tunnels so that
dissapearing trains can stop and be held out of sight, maybe allowing
another train to emerge via an automatically controlled passing loop.
Automatic signals can be made to operate at the entrance to the tunnel using
mechanically triggered switches or signals as the trains are passing. I have
set up a few experiments on this basis and it is possible for a train
leaving the tunnel (ie the last point at which the tracks are parellel) on
the 'down' line to trigger a 'line clear' signal on the adjacent 'up' line
using nothing more than simple mechanical levers. In reality the adjacent
'up' track is the same as the 'down' track only several sections to the rear.
Maybe someone has tried a similar thing with colour light signals on track
circuits?
Jon
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Message is in Reply To:
 | | Re: 'Dog Bone' - definition
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| SRC <LEGOArches@yahoo.com> wrote in message news:G9sIqE.35@lugnet.com... (...) Good question. Still I think that the first one is usually used for trams, the second not used much at all, and the third one being a track with a run-around (as they (...) (24 years ago, 6-Mar-01, to lugnet.trains)
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