TT Scale Society

Re: TT Scale Society

Postby jmass » Sun Dec 15, 2013 7:06 pm

Reading some of the early posts, was a chassis ever decided on for the gp38?
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Re: TT Scale Society

Postby ConducTTor » Sun Dec 15, 2013 11:26 pm

One of the options was for me tweak the chassis for my u boat.......
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Re: TT Scale Society

Postby jmass » Wed Jan 01, 2014 10:55 am

Anything new with this project? hope things with the caster are going well.
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Re: TT Scale Society

Postby scaro » Wed Jan 22, 2014 8:49 am

There has been an announcement on the Yahoo group that the GP38 or GP38-2 (unsure which) shell has arrived and reports are that it is very good.

Ben
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Re: TT Scale Society - Good News! GP38 shells!!!

Postby Richard-B » Thu Jan 23, 2014 12:45 am

As I posted elsewhere:
The GP38 shells have landed!!!!!!!!!!!!!

These shells TOTALLY EXCEED expectations!
Congratulations to Al Reibel and the TT Scale Society on a superb achievement!

The quality and smoothness of the shell surfaces are nearly the equal of injection molding...

First touch with the digital caliper says the interior hood width is just about 13.2mm...
and the available interior height at the shell center is about 24mm.

If you have NOT contacted Al to discuss reserving these shells... NOW is the time!

2014 is going to be a GREAT Year for TT-Scale!!!
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Somewhere between Shenzhen and Budapest...
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Re: TT Scale Society

Postby ctxmf74 » Thu Jan 23, 2014 2:37 am

"The GP38 shells have landed!!!!"

What drive are they designed for? ..DaveB
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Re: TT Scale Society

Postby Richard-B » Thu Jan 23, 2014 3:24 am

ctxmf74 wrote:What drive are they designed for?

The designed-for drive is Bull-Ant... and there will be an etched chassis adapter for it.

The Lok-n-Roll Lionel-compatible arrangement may work, others are considering alternatives using Tillig components (similar to the PVM Lionel GP9 powering arrangement), modified Peco Hercules components, or other semi-scratch approaches.

"So many choices... so little time..."
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Re: TT Scale Society

Postby scaro » Thu Jan 23, 2014 3:57 am

the two viable lok n roll chassis however are not going to be the right wheelbase for a GP38. unless he does another one, but it needs to be clear what wheelbase the truck is.

we had a couple of threads on that on here, but the answer remained indeterminate. as i could never work that out, i did not buy. there's a learning there ... being specific sells models.

as the Piko Hercules is 22.2mm, and has a scale 34' wheelbase, that ought to be sufficient 'guts' for a hood chassis just based on a sheet of of brass. depends how wide the motor is, though. would probably have to sit on its edge. and it does realistically need NWSL wheels as the NEM ones supplied are going to be too big, especially with the flanges.

small issue, but is this loco a GP38 or a GP38-2 ?

picky I know, but they are different.
Last edited by scaro on Thu Jan 23, 2014 9:13 am, edited 1 time in total.
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Re: TT Scale Society

Postby j p » Thu Jan 23, 2014 5:16 am

scaro wrote:
as the Piko Hercules is 22.2mm, and has a scale 34' wheelbase, that ought to be sufficient 'guts' for a hood chassis just based on a sheet of of brass. depends how wide the motor is, though. would probably have to sit on its edge. and it does realistically need NWSL wheels as the NEM ones supplied are going to be too big, especially with the flanges.


Nono, I have to make a correction here.
Please don't blame NEM for the flanges! It is the manufacturer's decision to make large flanges, not NEM.
All HP Products' and most NMRA flanges are also according to NEM.
NEM has just a wider tolerance for the flange depth (0.5 mm - 1 mm), while NMRA standard has max. 0.66 mm.
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Re: TT Scale Society

Postby scaro » Thu Jan 23, 2014 8:51 am

Not getting into that except to observe that it sounds like it was their choice to set the tolerance wide, if it were set narrower, maybe manufacturers would have gone for something a bit more realistic?

More of an issue is that the existing wheels of the Hercules are at least 1mm too big for a GP38.
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