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oldscout
21st Oct 2014, 07:33 PM
A couple of week ago I got to ride the DSNGRR. Where the the narrow guage 2-8-2's built from the standard guage engines or made for narrow guage. Did they spread the frames to put the drive wheels inside of the frame or made that way?

Jugtown Modeler
21st Oct 2014, 10:36 PM
I have often wondered this regarding other locomotive types or railroads. So I did some digging...

From SteamLocomotive.com: http://www.steamlocomotive.com/mikado/?page=drgw

The Denver and Rio Grande (predecessor of the DSNGRR) early narrow gauge 2-8-2 Mikado type locomotives - "The simple two cylinder locomotives had 40" diameter drivers, 17" x 22" cylinders, a 200 psi boiler pressure and they exerted 27,022 pounds of tractive effort. The firebox was 113 square feet and the evaporative heating surface was 2149.

Later, the D&RG RR ran standard gauge Mikados with " 63" diameter drivers, 27" x 30" cylinders, a 200 psi boiler pressure and they exerted 59,014 pounds of tractive effort. The firebox was 335 square feet, the evaporative heating surface was 3,700 square feet and with the superheater the combined heating surface was 4,495 square feet."

So it would appear that they are different beasts... but I am not an expert.... Anyone else more enlightened?

Michael Whiteman
21st Oct 2014, 11:07 PM
Weren't the K-35s a standard gauge engine?

randgust
22nd Oct 2014, 12:00 PM
Boilers from standard gauge engines were re-used on narrow-gauge frames on some classes.

http://en.wikipedia.org/wiki/D%26RGW_K-37

And be aware that the same railroad had standard-gauge and narrow-gauge divisions in Colorado. D&RG and D&RGW

Jugtown Modeler
24th Apr 2018, 06:00 PM
Due to the recent Nn3 forum add, I am resurrecting a few topics that have been forgotten.

In reference to the OP, I would "assume" that each narrow gauge road had unique requirements. Having perused some old steam locomotive catalogs, I can say there were quite a few products available to suit various needs. If you were in the market for a locomotive, narrow gauged or not, you could look at several manufacturers offerings to find a suitable product.
@randgust (http://www.nscale.net/forums/member.php?u=2225), you seem more informed on this topic. Your response was that they re-used the boilers. Can I assume then that the drivers and cylinders were rebuilt during the conversion? Or am I confusing other later Mikados specs?

My interest is for other types of locomotives. If one railroad re-gauged their fleet, perhaps others did as well. I have seen tourist narrow gauge 0-4-0 and 0-6-0 tank engines, think goat or docksider. I have been looking to put a marklin chassis under a standard gauge model. (for loco bigger than a teakettle...) How prototypical would this have been? Or would these have been smaller locomotives, than standard gauge, from their initial catalog purchase?

Anyone?

Thanks!