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Author Topic: Atlas 4 axle Uboat shell swaps  (Read 646 times)

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drgw0579

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Atlas 4 axle Uboat shell swaps
« on: April 26, 2025, 07:52:26 PM »
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Does anyone have any ideas if the recent Atlas Gold 4 axle U23B  frames might host the older U25B body?

Bill Kepner
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GGNInNScale

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Re: Atlas 4 axle Uboat shell swaps
« Reply #1 on: May 01, 2025, 04:27:26 PM »
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I would call Atlas.  The guys are really helpful for questions like yours.
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Missaberoad

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Re: Atlas 4 axle Uboat shell swaps
« Reply #2 on: May 02, 2025, 12:24:00 AM »
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There's a 41" difference in wheelbase. Even if the shell fit it would look goofy.
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drgw0579

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Re: Atlas 4 axle Uboat shell swaps
« Reply #3 on: May 03, 2025, 08:36:39 PM »
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And the answer is...

Sources at various places have the truck centers at 36' 02" for all 4 axle uboats.  https://trainiax.net/mephase-geub.php

Side by side, the 45966 U23B and my old Kato-built U25B match up pretty good:




However, trying to stuff the U25B shell onto the U23B mechanism is a non-starter.  The newer model frame is slightly wider  11.1 mm vs 10.4 mm.

So the answer is:

No!
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