AT&SF #2926 RESTORATION

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AT&SF #2926 RESTORATION

Postby DonPevsner » Sun Aug 29, 2010 10:02 pm

Please see the Op-Ed piece of mine that was just published in the Santa Fe NEW MEXICAN, on Friday, August 27, 2010:

http://www.santafenewmexican.com/Opinio ... the-future
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Re: AT&SF #2926 RESTORATION

Postby daylight4449 » Sat Feb 05, 2011 9:39 pm

so, what's with that smokestack? i've never seen one with variable height
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Re: AT&SF #2926 RESTORATION

Postby Allen Hazen » Sun Feb 06, 2011 6:53 pm

Deaylight 4449--
Taller smokestack makes for greater power and/or efficiency. (You want lots of air/gas flow from the firebox through the tubes to the smokebox -- exhaust steam, shot up from the "blast pipe" into the smokestack is what "pumps" air and gas through the boiler, and a taller stack makes this process work better.) Shorter smokestack, though, is better for going under low bridges (etc). The Santa Fe, which had long runs with good overhead clearance, had extendible stacks (I think raised by compressed air) on some of its locomotives, allowing them to fit into the clearance diagram where this was limited but also to get the advantages of a taller stack where clearances permitted.
--
Another question for the 2900-class experts: I think I remember reading that these locomotives had a valve arrangement allowing steam-cylinder braking: letting saturated steam into the engine cylinders (with reversed gear) which would be compressed in the cylinders to provide a sort of dynamic brake effect. I couldn't find any reference when I looked a few months ago: is this true, or have I badly misremembered something?
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Santa Fe 2926 restoration

Postby Tom6921 » Sun Jan 26, 2014 10:32 pm

As some people may know, the New Mexico Steam Locomotive & Rail Road Historical Society is restoring former ATSF 4-8-4 #2926 to operation in Albuquerque, NM. I wonder if when the restoration is complete, 2926 will run as a double header with 3751?
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Re: Santa Fe 2926 restoration

Postby Backshophoss » Mon Jun 20, 2016 2:38 pm

The flues are in,there should be a pressure test this summer,as of this sat(06/18/16),2926 now has an engine shed to
get out of the weather.
There's still some work to do,the hope is to be running next summer.
There's an article in last sunday's ABQ Journal which might be under a paywall.
http://www.abqjournal.com

http://www.nmslrhs.org
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Re: AT&SF #2926 RESTORATION

Postby Backshophoss » Mon Jun 20, 2016 2:46 pm

Forgive the dust,2926 is roughly close to running again,and now has an enginehouse to get out of the weather.
Hope to be running by next summer.

http://www.nmslrhs.org
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Re: AT&SF #2926 RESTORATION

Postby mp15ac » Thu Jun 23, 2016 9:08 am

Allen Hazen wrote:Deaylight 4449--

Another question for the 2900-class experts: I think I remember reading that these locomotives had a valve arrangement allowing steam-cylinder braking: letting saturated steam into the engine cylinders (with reversed gear) which would be compressed in the cylinders to provide a sort of dynamic brake effect. I couldn't find any reference when I looked a few months ago: is this true, or have I badly misremembered something?


No, Santa Fe did not use steam-cylinder braking. What it did use were bypass valves which allowed the air/steam in the cylinders to pass between them when drifting on long down grades. Otherwise when the throttle was cutoff the cylinders would suck in the exhaust gases from the smokebox.

Stuart
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Re: AT&SF #2926 RESTORATION

Postby Allen Hazen » Thu Jun 23, 2016 10:49 pm

Stuart--
Thank you! I am not sure where I initially read about the Santa Fe's (later?) 4-8-4 having a form of "dynamic braking" (there was a big article in "Trains" -- basically a whole issue -- devoted to the Santa Fe's 4-8-4, and I re-read it carefully after I posted the question: it WASN'T there!), but it sounds as if it was from someone who had heard about the feature you describe, but didn't understand it very well...
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Re: AT&SF #2926 RESTORATION

Postby John_Perkowski » Sat Jul 02, 2016 11:10 am

Admin note: Two 2926 topics merged into one.
~John Perkowski: Moderator: General Discussion: Locomotives, Rolling Stock, and Equipment
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