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Sectioned 2-4-2
https://www.rypn.org/forums/viewtopic.php?f=1&t=21271
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Author:  bobyar2001 [ Mon Sep 04, 2006 9:21 am ]
Post subject:  Sectioned 2-4-2

In the European wheel arrangement, that is, at the museum in Mulhouse, France:

http://www.railpictures.net/viewphoto.php?id=157041

Author:  Ron Goldfeder [ Mon Sep 04, 2006 11:07 am ]
Post subject:  Re: Sectioned 2-4-2?

Did you mean 2-3-2? Or 4-6-4 in North American usage?

Author:  bobyar2001 [ Mon Sep 04, 2006 12:11 pm ]
Post subject:  Re: Sectioned 2-4-2?

Yes.

Author:  Aarne H. Frobom [ Tue Sep 05, 2006 9:17 am ]
Post subject:  French Freakishness

I was once shown a book that had a clearer picture of this 4-6-4 than my computer screen will produce. In the picture I could see that the small tubes were finned on the inside for better heat transfer, a good illustration of how the French tried to milk their engines for maximum efficiency. I always wanted to know how these were made, and how you'd roll them. And I could see that some of the superheaters had holes burned through them, just like Type E's usually do.

Author:  scottychaos [ Tue Sep 05, 2006 9:29 am ]
Post subject:  Re: French Freakishness

How would that engine be a 2-4-2?
in *any* system?

Scot

Author:  Bobk [ Tue Sep 05, 2006 9:35 am ]
Post subject:  Re: French Freakishness

European system is to count the wheels on one side. This engine then using the American Whytes system is a 4-6-4, In Europe it should be a
2-3-2

Author:  ray dewley [ Thu Sep 07, 2006 5:12 pm ]
Post subject:  Re: French Freakishness

A friend that works for Alstrom power says that the tubes with internal surface riffled features these days are for the critical and super-critcal boilers so that the water will touch the internal tube surface and keep them from softening and bursting as there is a minute steam space between the water and the tube especially in the furnace area.

The finned internal surface of the fire tubes must have been a cinder and soot magnet.

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