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 Post subject: Re: Northern Pacific 2-6-2 cosmetically restored!
PostPosted: Tue Dec 04, 2018 5:09 pm 

Joined: Fri Dec 16, 2011 4:44 pm
Posts: 110
rjenkins wrote:
Scott wrote:
Any inherent design issues? I may be biased (NP fan) but this looks like a great design for consideration for replication in the future.


One issue with this design is that, unlike a typical logging/shortline prairie designed for bi-directional operation, the trailing wheels on the NP prairies are part of the rigid wheelbase. There is some degree of lateral motion, but it is not a swiveling truck that would guide the locomotive into curves when running in reverse, so it would be no better (and no worse) than a 2-8-0 or 4-6-0 in that regard. Plus, of course, there's all the maintenance fun that comes with having inside valve gear. As a similarly biased NP fan though, it sure would be nice to see!


I'd start with the CN's proposed postwar 2-6-2s and proceed from there. Add whatever jewelry and make up you wish.

Image

Probably a tad large for movement by truck though, that seems to be a common desire with such proposals.

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 Post subject: Re: Northern Pacific 2-6-2 cosmetically restored!
PostPosted: Tue Dec 04, 2018 5:59 pm 
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Joined: Sat Jan 20, 2007 5:40 pm
Posts: 355
Location: Hamilton, Illinois
Lake Shore & Michigan Southern also used some higher-drivered 2-6-2s in passenger service. After the LS&MS was absorbed into the New York Central, some were rebuilt with an actual outside-journal trailing truck (and other upgrades). They were the NYC's original class J, and were apparently all retired before the appearance of the class J Hudsons in 1927 -- except 2-6-2s of class J-41 that were rebuilt as Pacifics and classed K-41, which lasted into the early 1930s. Source: Edson and Vail, STEAM LOCOMOTIVES OF THE NEW YORK CENTRAL LINES, Vol. 2.

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 Post subject: Re: Northern Pacific 2-6-2 cosmetically restored!
PostPosted: Thu Dec 06, 2018 5:02 pm 

Joined: Tue Aug 02, 2005 1:25 pm
Posts: 5428
rjenkins wrote:
Scott wrote:
Any inherent design issues? I may be biased (NP fan) but this looks like a great design for consideration for replication in the future.


One issue with this design is that, unlike a typical logging/shortline prairie designed for bi-directional operation, the trailing wheels on the NP prairies are part of the rigid wheelbase. There is some degree of lateral motion, but it is not a swiveling truck that would guide the locomotive into curves when running in reverse, so it would be no better (and no worse) than a 2-8-0 or 4-6-0 in that regard. Plus, of course, there's all the maintenance fun that comes with having inside valve gear. As a similarly biased NP fan though, it sure would be nice to see!


Scott and Richard -

There WERE some of the "main line" 2-6-2 Prairies that were built with swiveling trailing trucks. Including the Santa Fe's 1800 and 1857 class engines, the R4 and R5 classes on the CB&Q, along with those on the Wabash and the CGW. And I don't believe that any of these had inside valve gear.

Les


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 Post subject: Re: Northern Pacific 2-6-2 cosmetically restored!
PostPosted: Thu Dec 06, 2018 7:22 pm 
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Location: Hamilton, Illinois
It appears that the Wabash G-1 class of 2-6-2s had the Stephenson valve gear.
https://www.railarchive.net/randomsteam/wab2022.htm

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 Post subject: Re: Northern Pacific 2-6-2 cosmetically restored!
PostPosted: Thu Dec 06, 2018 7:34 pm 

Joined: Thu Aug 26, 2004 2:50 pm
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Location: Northern Illinois
The Soo Line tried the wheel arrangement with an order to Alco for ten in 1907, 800-809, built as compounds and later simpled. They had 63" drives, conventional trailing trucks, and piston valves as rebuilt, but retained their Stephenson valve gear. They must have been serviceable, as they lasted almost to the end of steam, but the order was never repeated.

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 Post subject: Re: Northern Pacific 2-6-2 cosmetically restored!
PostPosted: Thu Dec 06, 2018 8:20 pm 

Joined: Sun Feb 24, 2013 1:09 am
Posts: 74
As far as I can tell, all of the Wabash 2-6-2s had Stephenson valve gear. The 2-6-2s for the CB&Q and the CGW were originally built with Stephenson valve gear, but a few were built rebuilt with Walschaert valve gear. The AT&SF 1800 & 1857 class were built with Walschaert valve gear.

This information was obtained from http://www.steamlocomotive.com.

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