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Union Pacific 9000 4-12-2
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In 1925, Union Pacific put in an order with ALCO for a large rigid locomotive. The resulting locomotive had a 4-10-2 wheel arrangement and 3 cylinders. The prototype was dubbed 8000 and put through trials. While this design was considered successful and, indeed, was used by UP and, more notably, Southern Pacific, UP decided that they could coax more pulling power out of the design with more wheels, and ALCO produced the first of the 9000 class in 1926. Between then and 1934, 88 were produced in total. The third cylinder sat between the other two, slightly higher and at an angle to allow its action to clear the first axle. While the two outer cylinders drove the third axle in the conventional manner, the third cylinder drove the second axle via a crank. To allow for clearance, the first and second axle are 18 inches farther apart than the others. Accommodations also had to be made for the 6 rigid drive axles. Originally, the third and fourth sets of drivers were blind, and the first and sixth were fitted with lateral motion devices, but these devices proved to be sufficient to prevent derailing or damage to the track, so ultimately all the drivers were flanged. This engine was successful, and most of the examples ran for over 20 years. Their main drawback was increased maintenance costs due to the third cylinder's inaccessible location. Their primary purpose was to speed up freight service on UP's plains routes, although they did attempt to run it in Wyoming with limited success. Number 9000 is the only surviving example and is, to my knowledge, the largest surviving rigid frame locomotive in the world today.
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Comments

 I like it 
  July 4, 2012
Fantastic! Would be very glad to have it in the 1920-1940 group. Will send you an invitation.
 I like it 
  November 11, 2011
Good looking locomotive! I hope it can go around curves though...
 I like it 
  April 3, 2010
That looks amazing!
 I like it 
  December 31, 2009
It's over 9000!!! XD The UP 9000 is one of the steam locomotives I like. =)
 I like it 
  November 8, 2009
How this doesn't have more comments is a mystery to me. Your use of parts to pull off the amazing detail is very inspiring(black heads and tires on the front for example). It's too bad people don't take more time to really explore these pages and be influenced by work such as this. Great job!~H
 I like it 
  July 23, 2009
I happened upon this page while searching for a particular photo of the first 4-12-2, 9000. I read the description (quite accurate, good work) and it wasn't until I'd read some of the comments that I decided to take a closer look and was ASTOUNDED to see the materials used to construct the model. My jaw dropped! Honestly, fabulous work!
 I like it 
  June 16, 2009
One of your best....
 I made it 
  June 12, 2009
Quoting Dave Sterling Now THAT is an impressive train MOC. Great work! I like all of the detail and the way you did the driving rods and pistons is great. :-) One question though...is it static or will it run on a 9V layout? How does it do heading through switch points? Any video of it running?
I waited to respond because I was in the process of motorizing it. There is a Power Functions XL motor in the firebox now, and it runs pretty well. It's designed to be able to navigate any track configuration. I don't have the ability to upload vidoes as the moment, unfortunately.
Nathaniel Brill
 I like it 
Thomas N
  June 9, 2009
Simply astounding, it's crisp and clean, and every detail is just perfect, fantastic work! ~T
Nathaniel Brill
 I like it 
Dave Sterling
  June 9, 2009
Now THAT is an impressive train MOC. Great work! I like all of the detail and the way you did the driving rods and pistons is great. :-) One question though...is it static or will it run on a 9V layout? How does it do heading through switch points? Any video of it running?
 I like it 
  June 9, 2009
This is just amazing. I can't imagine how long this must have taken. Go UPRR!
 I like it 
  June 9, 2009
very well done, amazing model. always one of my fav engines great to see your version in lego form.
 I like it 
  June 9, 2009
It's MOC's like these that are turning me into a fan of the whole train theme...nicely done!
 
By Nathaniel Brill
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Added June 8, 2009
 


LEGO models my own creation MOCpages toys shop Union Pacific 9000 4-12-2Engines


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