Dual Gauge Turnout

[RadSolution]

Hello,

This is a call for some help by a Templot expert user…

I plan to incorporate a dual-gauge 00 and 009/H0e section,
which will have a shared platform for both gauges,
with a run-round loop opposite the platform for both.

This track is available and would work.
However, as can be seen, they don’t offer a dual-gauge turnout (points), so to create the loops requires 4 turnouts instead of 2.

Is anyone well-versed enough in Templot to create such a turnout? I will require a LH and a RH version to be hand-built, eventually.

Thanks

 

[Bill Campbell]

Have you considered a dual gauge turntable or sector plate at the terminal end of the loop?

You could then use the ready made turnouts as two separate crossovers at the other end.

My experience of designing dual gauge turnouts and crossovers for a friend showed problems with clearances - doable but tricky. The basic approach I used was to overlay the turnout for one gauge with the other - but you may need to decide on a common V or a common switch depending on the hand of the turnout. I suspect that Tillig took the approach they did because of the difficulties with shared flangeways.

Regards.

 

[RadSolution]

Bill, there won’t be a ‘terminal end’ as the two gauges approach the station from opposite ends, and only overlap in the station platform area….

 

[Martin Wynne]

I plan to incorporate a dual-gauge 00 and 009/H0e section,

Hi,

Welcome to Templot Club.

Unfortunately that won't work. Or at least it won't work in the way Templot users expect things to work.

You can't use mixed-gauge pointwork unless both gauges use the same wheel profile. Unfortunately that's not the case with 009 which typically uses N gauge wheels.

009 models are to 4mm/ft scale, so they should be using 4mm/ft wheel profiles. But they don't.

This is what happens:

To run 00 wheels you need a 00 flangeway gap. As a result the gap across in front of the crossing nose (yellow mark) is wider than a 009 N-gauge wheel and it it will fall into it with a bump.

The problem is even worse if the 00 wheels need to use both roads. In that case the gap across in front of the nose is even wider, and 009 wheels will not only bump down into it, they will very likely derail.

To do what you want, you will need to re-wheel your 009 models with small 00 wheels instead of their N-gauge wheels.

The same applies wherever narrow-gauge modellers use wheels and mechanisms from a smaller scale, such as 16.5mm narrow-gauge in 7mm scale using 00 wheels. If you do that, you can't have mixed-gauge track.

cheers,

Martin.

 

[RadSolution]

Thanks Martin.
You explained it perfectly.

Re-wheeling my 009 stock is almost certainly a no-no…

So it looks like I’m stuck with the 2 points at each end of the run-around

 

[Martin Wynne]

So it looks like I’m stuck with the 2 points at each end of the run-around

@RadSolution

Not necessarily. Have you thought about movable wing rails? There's a prototype for everything on narrow-gauge.

There's a long topic about mixing 00 and 009 here:

https://85a.uk/templot/archive/topics/topic_3498.php

cheers,

Martin.

 

[Justme Igor]

Flange baring frogs? with a small extra guides init?

 

[Martin Wynne]

Flange baring frogs? with a small extra guides in it?

@Justme Igor

Hi Igor,

For flange running to work, ALL wheels must have the same flange depth. This is very rarely the case, even with supposedly similar wheels from different manufacturers.

p.s. English department

You meant bearing.

bare = uncovered, exposed: bare copper wire instead of insulated wire

bear = support, hold (usually something heavy): track with concrete bearers instead of wooden timbers, car wheel bearings

cheers,

Martin.

 

[S-Club-7]

Bear = big brown, black or white hairy creature with large teeth and claws; and a larger appetite - - as in "run for your life"