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jasona2z

Track question

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jasona2z

Hi All,

 

just a quick question about T-trak spacing.

 

This week I purchased some pre-made T-trak modules, and this is how the single track was spaced when it arrived. 

 

post-4092-0-87440800-1487138375_thumb.jpeg

 

However, I plan to use Kato double track, but am now confused....

 

Im going to be following the Australian t-trak standards, and assume the module with the two lines of single track, are spaced incorrectly?

 

Thanks,

 

Jason. 

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cteno4

Jason,

 

There are two Ttrak specs. The first have the two tracks right next to each other at 25 mm separation. This is the original "standard" spacing that was first created for Ttrak more for small trains and trams. The biggest issue with the alternate spacing is it's not the standard separation of kato curves so you need to do some odd swinging, non parallel curves to do the corners. These are actually sort of prototypical for some streetcar tracks but not really standard for regular railways and are a pain in the ass to cut road segments out for if you want to make pavement between and around tracks. Standard spacing was very widely used in Japan up until lately.

 

Later folks created the "alternate" spacing of the standard kato unitrak 33mm curve spacing increments to make life easier on the corners and run larger trains. Alternate spacing has become the predominant spacing for Ttrak here in the us and also in Australia from what I've seen. More info on Australian Ttrak guidelines here

 

http://t-trak.nscale.org.au/guidelines

 

What you got looks really off. I would check with the producer of the modules to see what's going on here. Also check with your local club as well to verify everything if you plan on running with them or larger regional setups.

 

Cheers

 

Jeff

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cteno4

The only other thing I can think of here is if he sells modules that have the 49.5 mm spacing that you get for a siding or platform bumpout and you got one of those.

 

Jeff

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IST

 

Im going to be following the Australian t-trak standards, and assume the module with the two lines of single track, are spaced incorrectly?

 

 

Yes, it is spaced incorrectly. But I agree with Jeff that maybe it was part of a station modul with platform between the tracks and this is the reason of the huge space.

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kvp

The Kato platforms use 33 mm spacing, which means one platform occupies the space for one track, while this one is 33 mm short. On the other hand, if you use the original tracks next to each other (tram) spacing of ttrak, then these two tracks are just right for a nice Kato island platform.

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gerryo

Thanx, Jeff, for the t-track guidelines link.  This gives me something else to compare my t-track-z dimensions to.  Most of my modules compare quite close to Australia's dimensions, except that I cut an extra mm from all lengths to allow easier connection of the layouts.

 

gerryo

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cteno4

gerry,

 

those are the Australian ones. pretty much the same as the old lee us ones.

 

the lee specs and site are being maintained as well (she passed away a few years back).

 

http://ttrak.org

 

most clubs basically follow it but there are a few factions that have minor differences in wiring colors, connections and such, but most of the basic module sizes and track layouts all match up for universal running and details can get worked out at shows on wiring and such with adapters or wire cutters and tape if need be...

 

jeff

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cteno4

sorry yes the 49.5 is the siding using a #6 point and 718 w/o the spacer 62 for the platform. track spacing looks to be around that on that module. sorry posted that just before bed and not all that clear!

 

jeff

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westfalen

Yes, way out.  33mm is the correct spacing, don't know how they would have come by the wider spacing.  As I always tell newcomers to T-TRAK, follow the guidelines and you will have no problems.

 

Something also worth mentioning from my experience is that some of the double track Unitrack sections are slightly shorter than advertised, only fractions of a millimetre but enough over the length of a module to not leave enough overhang to join the modules properly.

 

BTW I am the QLD T-TRAK rep mentioned on the Australian T-TRAK page.

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jasona2z

gerry,

 

those are the Australian ones. pretty much the same as the old lee us ones.

 

the lee specs and site are being maintained as well (she passed away a few years back).

 

http://ttrak.org

 

most clubs basically follow it but there are a few factions that have minor differences in wiring colors, connections and such, but most of the basic module sizes and track layouts all match up for universal running and details can get worked out at shows on wiring and such with adapters or wire cutters and tape if need be...

 

jeff

 

Hey Jeff, Thanks for the info.

 

Yes, way out.  33mm is the correct spacing, don't know how they would have come by the wider spacing.  As I always tell newcomers to T-TRAK, follow the guidelines and you will have no problems.

 

Something also worth mentioning from my experience is that some of the double track Unitrack sections are slightly shorter than advertised, only fractions of a millimetre but enough over the length of a module to not leave enough overhang to join the modules properly.

 

BTW I am the QLD T-TRAK rep mentioned on the Australian T-TRAK page.

 

Hi westfalen. 

 

I'm sure I'll have lots more t-trak questions in the future, good to know who is in the know around here. 

 

Regarding the double track. I like the appearance of the concrete ties more, but have heard that it is slightly shorter. I haven't decided what I want to do about that yet. It would be awesome if unitrack had wood tie and concrete tie options for single track. 

 

 

 

 

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kvp

Regarding the double track. I like the appearance of the concrete ties more, but have heard that it is slightly shorter. I haven't decided what I want to do about that yet. It would be awesome if unitrack had wood tie and concrete tie options for single track. 

You mean like this? http://www.1999.co.jp/eng/10136444

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jasona2z

 

I do mean like that!!! I did no know this exisited. Why don't they make it in all the standard lengths?

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cteno4

its fairly new and takes money to set up dies for them all. its mainly meant for station stretches for use with all the double concrete tie sections available. its big production and inventory costs with something like track as they need to keep it in stock and stock a lot of different pieces and this gets expensive, so i think they tend to be conservative on branching into whole new lines, hence only mainly double track concrete tie first.

 

jeff

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katoftw

My 248mm double pieces measure 248mm.  My 62mm double pieces measure 61mm.

 

My concrete tie 248mm single pieces measure 247.5mm.

 

I haven't measured any of my single wooden tie pieces.  But I'm sure there would be variances in those also.

Edited by katoftw
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Rod.H

I've picked up some double track unitrack & noticed some length variance on the straights when compared to the same length single straight. So is length variance & electrical fun with the crossover (single & double) the main issues with using it on a T-trak module?

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