scaling down OO card models

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colinmc1
Posts: 4
Joined: Thu Oct 31, 2019 10:56 am

scaling down OO card models

Post by colinmc1 »

I have found a number of free card models for buildings and bridges but they are on OO scale. I know the ratio to scale N Gauge down to T Gauge is 33% but I have tried printing these OO in various scaled down ratios but cant seem to get it right, does anyone know what the correct ratio is that I should scale them down by?

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Nutter
Posts: 498
Joined: Tue Feb 24, 2015 12:05 pm
Location: S E London

Re: scaling down OO card models

Post by Nutter »

16 or 17% for OO
32.8 British N 1/148
35.5 US or European N 1/160
48.8 Z gauge 1/220


Simple formula Scale is in divide by scale wanted eg 220(Z) ? 450 (T) = .48.8 when printing put 48.8 in print scale change
Mike
DON'T knock it at least I am trying to do something, with only one good hand.

rail450
Posts: 102
Joined: Thu Oct 27, 2016 7:05 pm

Re: scaling down OO card models

Post by rail450 »

yes, this is the mathematical calculation of the downscaling.

In the new 1:450 model, however, the minimum wall thickness must be checked.

Shapeways will not print below the minimum.

BR,

Siegfried

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