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CRAZY Bridge Of The Day !
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 Posted: Sun May 5th, 2019 02:55 pm
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Si.
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" Strange, for a re-release they changed it from 1/72 to 1/76  :)  [whack] :doh: "



Hi Cor  :wave:



Yes ... Very weird ?  L:



1:72 is, I think, the model-plane scale my friend Pat likes. 

&

1:76 is OO model-train scale ... Right ? 

(Geez, I should check my 'facts' before Posting !)  ;)



Anyone know how come we have TWO scales like these, really close together ?  L:

It aint exactly the only example of this of course.  :P



Def. 'weird' on the part of 'Airfix' though.  :Crazy:



:dt:



Si.




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 Posted: Mon May 6th, 2019 03:25 pm
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corv8
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Alwin wrote:
And why did they use ballast on the bridge?
The extra weight makes that the construction has to be extra heavy too.
There other solutions for that.


I understand that this is the way to go today.

A non ballasted bridge will cause a "dip" in the roadbed before and after the bridge,
because the ballast will settle and the steel or concrete bridge doesnt.

This may cause a high powered loco to slip its drivers momentarily,
and then cause stresses on the drive components when she grips the rails again.


Gerold


.... just noticed I commented to a very old message ....
anyway, maybe its still of interest.




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