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"Michael Pratt" <mpratt@cix.co.uk> wrote in message
news:memo.20001214175927.44447A@mpratt.compulink.co.uk...
> When you create a siding using two switches does the track
> not in use become isolated ? this does not work for 12v but I think it
> does for 9v because the direction of the switch determines which line
> carries the current.
> What I want is to have two trains on one track with an isolated part of
> the line.
> Am I talking rubbish ?
>
> Michael Pratt
Do you mean having a passing line
like this crude diagram, where there are two switches to allow a length of
parallel track?
----<=====>-----
If so, you must remember to switch both switches to isolate one of the lines
though if the parallel line is long enough to allow both trains to pass each
other in motion, and you wanted to sit and actually play with it, a quick
bit of switching would allow both trains to continue in motion as they pass
by switching the switches one at a time.
regards
lawrence
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In article <G5LopF.9Fw@lugnet.com>,
lawrence@thewilkesfamily.freeserve.co.uk (lawrence wilkes) wrote:
> Do you mean having a passing line
> like this crude diagram, where there are two switches to allow a length
> of
> parallel track?
> ----<=====>-----
Yes I do !
> If so, you must remember to switch both switches to isolate one of the
> lines
> though if the parallel line is long enough to allow both trains to pass
> each
> other in motion, and you wanted to sit and actually play with it, a
> quick
> bit of switching would allow both trains to continue in motion as they
> pass
> by switching the switches one at a time.
I don't think you can do this with 12 volt though.
Michael Pratt
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>
> I don't think you can do this with 12 volt though.
To do it in 12v you need a 7860 (remote controlled stop). This allows you
to cut off power to a section of track. Hook it up on the lane where you
want the train to stop, and let the main line have the right of way (and
continuous power).
-Greg K
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Michael Pratt wrote:
> In article <G5LopF.9Fw@lugnet.com>,
> lawrence@thewilkesfamily.freeserve.co.uk (lawrence wilkes) wrote:
>
> > Do you mean having a passing line
> > like this crude diagram, where there are two switches to allow a length • of
> > parallel track?
> > ----<=====>-----
>
> Yes I do !
>
> > If so, you must remember to switch both switches to isolate one of the • lines
> > though if the parallel line is long enough to allow both trains to pass • each
> > other in motion, and you wanted to sit and actually play with it, a • quick
> > bit of switching would allow both trains to continue in motion as they • pass
> > by switching the switches one at a time.
>
> I don't think you can do this with 12 volt though.
>
> Michael Pratt
Can't do it with prototypes either, I think. Not legally, anyway,... ;-)
Rick C.
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Rick Clark wrote:
>
> Michael Pratt wrote:
>
> > In article <G5LopF.9Fw@lugnet.com>,
> > lawrence@thewilkesfamily.freeserve.co.uk (lawrence wilkes) wrote:
> >
> > > Do you mean having a passing line
> > > like this crude diagram, where there are two switches to allow a length • of
> > > parallel track?
> > > ----<=====>-----
> >
> > Yes I do !
> >
> > > If so, you must remember to switch both switches to isolate one of the • lines
> > > though if the parallel line is long enough to allow both trains to pass • each
> > > other in motion, and you wanted to sit and actually play with it, a • quick
> > > bit of switching would allow both trains to continue in motion as they • pass
> > > by switching the switches one at a time.
> >
> > I don't think you can do this with 12 volt though.
> >
> > Michael Pratt
>
> Can't do it with prototypes either, I think. Not legally, anyway,... ;-)
Depends on the length of the passing track and the number of blocks. I
think to do it legally, the passing track would have to be three times
as long as the longest train plus some (so that each leg of the passing
track can be three blocks), but it might have to be four or five (I
don't remember the exact rules for when you're allowed to enter the next
block, but I'm pretty sure there has to be a clear block ahead of the
one you are entering to be able to enter under a green).
Frank
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Just jumping in here...
I believe one name for this is a passing track
----<=====>-----
What ever you call it, I have found it very useful at train shows to have a
few of these off the main line, each long enough to accomidate the entire
length of a main line train. I leave trains parked on the passing tracks so
visitors can look at them. When I get tried of running one train (or when
someone asks to see a parked train run) I wait for the running train to be
on the oppisite side of the track then I switch the points at the tail of
the parked train so power is running to the passing track as well. Now both
are running at the same time. I wait for the original train to pull into the
passing track and then I through the points cutting power to the passing
track. Thus the new train is running, the original is now parked, and I
never had to have a dead time on the main line.
Some times I'll let both trains run a few time around the main line watching
to make sure that they don't meet and connect as one. And of course both
trains have to have similar speeds (number of cars/weight/drag).
I also run this way on my layout at home, when it's setup.
SteveB
www.PNLTC.org
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Rick C. wrote:
> Can't do it with prototypes either, I think. Not legally, anyway,... ;-)
(about doing flying passes)-yes, you can, but usually you run out of room to do
it rather than anything else. You can also do what is called a "sawbuck",
which is when you have one train longer than the siding take the siding to pass
the other train- weird to see, but easy enough to do. Meccano mag used to have
little switching puzzles like that. It's like poleing, which is NOT illegal,
in spite of what some people think-it's just frowned on.
James
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STEVEBAR wrote in message ...
> I believe one name for this is a passing track
> ----<=====>-----
> What ever you call it, I have found it very useful at train shows to have a
> few of these off the main line, each long enough to accomidate the entire
> length of a main line train. I leave trains parked on the passing tracks so
> visitors can look at them. When I get tried of running one train (or when
> someone asks to see a parked train run) I wait for the running train to be
> on the oppisite side of the track then I switch the points at the tail of
> the parked train so power is running to the passing track as well. Now both
> are running at the same time. I wait for the original train to pull into the
> passing track and then I through the points cutting power to the passing
> track. Thus the new train is running, the original is now parked, and I
> never had to have a dead time on the main line.
> Some times I'll let both trains run a few time around the main line watching
> to make sure that they don't meet and connect as one. And of course both
> trains have to have similar speeds (number of cars/weight/drag).
> I also run this way on my layout at home, when it's setup.
This is exactly what I do at shows too.
I also put spare track inbetween the main track and passing truck
to store additional engines and wagons. I'm running 6 wides so
there is enough clearance so they don't get hit by a passing train :)
--
My LEGO creations site "Allanton NZ" is at
http://homepages.paradise.net.nz/~allanj/
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In lugnet.trains, James Powell writes:
> Rick C. wrote:
> > Can't do it with prototypes either, I think. Not legally, anyway,... ;-)
>
>
> (about doing flying passes)-yes, you can, but usually you run out of room
> to do it rather than anything else.
Modern US prototype railroading does this fairly regularly when in double
(or more) CTC controlled territory. You just have to complete the pass in
some reasonable time (every block usually has crossovers to let you get back
in your "lane")
Pennsy had a 4 track main through much of Pennsylvania so this was extremely
common.
> You can also do what is called a "sawbuck",
> which is when you have one train longer than the siding take the siding
> to pass the other train- weird to see, but easy enough to do.
I believe (with less certainty than the above) that this is very uncommon
these days but not unheard of...
> It's like poleing, which is NOT illegal,
> in spite of what some people think-it's just frowned on.
I'll take that action... I believe it's against the rules in most railroad
rulebooks which is the closest to illegal you can get. Since most switchers
no longer carry polehooks or poles, it's fairly moot. (I think a lot of
modern cars don't even *have* poling pockets but I could be wrong).
++Lar
> James
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Larry Pieniazek <lpieniazek@mercator.com> wrote in message
news:G5s8B2.I2w@lugnet.com...
> In lugnet.trains, James Powell writes:
>
> > It's like poleing, which is NOT illegal,
> > in spite of what some people think-it's just frowned on.
>
> I'll take that action... I believe it's against the rules in most railroad
> rulebooks which is the closest to illegal you can get. Since most • switchers
> no longer carry polehooks or poles, it's fairly moot. (I think a lot of
> modern cars don't even *have* poling pockets but I could be wrong).
Forgive my ignorance, but what exactly is "poleing"?
Regards,
ROSCO
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On Mon, 18 Dec 2000 21:13:50 GMT, "Larry Pieniazek"
<lpieniazek@mercator.com> wrote:
> In lugnet.trains, James Powell writes:
<snip>
> > It's like poleing, which is NOT illegal,
> > in spite of what some people think-it's just frowned on.
>
> I'll take that action... I believe it's against the rules in most railroad
> rulebooks which is the closest to illegal you can get. Since most switchers
> no longer carry polehooks or poles, it's fairly moot. (I think a lot of
> modern cars don't even *have* poling pockets but I could be wrong).
>
> ++Lar
>
> > James
I did a quick search of my NS rulebooks and I couldn't find anything
against poleing. Although I'm sure since we don't carry poles, and
like Larry said, most newer cars don't have the pockets, it really
dosen't matter. I'm sure if poleing isn't mentioned by name as being
illegal, you'd have to break other rules to accomplish it. Chains,
carried by most of our units, work pretty well to do the same thing
over a short distance BTW. Or so I've heard...
This subject came up at work awhile back, and out of the 5 or so
people in the discussion, most with over 30 years on the RR, only one
person had actually seen poleing done.
Jeff Christner
Visit Sixby Fire Tech at - http://members.aol.com/regult/
Help support my LEGO habit. Ship by rail.
Visit http://www.nscorp.com/ to find out how.
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In lugnet.trains, Ross Crawford writes:
> Forgive my ignorance, but what exactly is "poleing"?
Mechanically, Poling (poleing?? I dunno the spelling) is a way to move a car
that is not on the same track as the locomotive. A large stout pole (15 feet
long or so??) is placed in the poling pocket of the switcher and diagonally
to the car on the adjacent track, and the switcher is moved forward slowly
till the pole engages the poling pocket of the car. Some crewman needs to
stand there till the pole is under compression. The loco can then move the
car by pushing.... carefully.
Operationally, poling is a way to achieve a runaround when you don't have a
double ended siding, because you can push the car onto the siding, then
reverse back onto the main, and approach from the other side with the pole.
It's also a way of shifting one car from one freight door to another without
upsetting all the cars at adjacent doors.
Poling is *very* dangerous. The pole has to be held in place till it's under
compression. It can slip out and since it's under compression, the crewman
getting clear can get dinged. The pole can shatter/splinter and impale a
crewman. (they put steel bands around the poles to prevent that but it
happened anyway sometimes)
Poles aren't quite the size of telephone poles, they're only 4-6 inches but
that's still a lot of mass.
Chains, were such to be used for shifting cars, (and I'm shocked, Shocked,
SHOCKED that Jeff knows about their use that way, round up the usual
suspects) carry similar hazards but not as bad since they are under tension
instead of compression.
++Lar
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