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Union Pacific Big Boy 4006
About this creation
The first locomotive I've attempted in years. It runs on two 9V motors. The coal tender is 8 wide, the cab is 9 wide. The boiler is just over 8 wide. More and better pictures coming as I get them ready, including pictures of it negotiating curves.

The Union Pacific 4000 series, nicknamed 'Big Boy', legend has it by a worker who spraypainted it on one of the unfinished boilers, was among the largest steam locomotives ever built. 25 were made, beginning in 1941. They operated mainly in Wyoming between Cheyenne and Ogden, Utah. Each racked up approximately 1,000,000 miles before being retired, mostly in the late '50s. There are 8 currently on display in museums across the U.S.

I was fortunate to be able to see 4006 in St. Louis and take lots of pictures to help me in designing the model.









Our Engineer for scale








A few shots from left to right. The locomotive plus tender are about 112 studs long.



































The coal tender. Pressing the 2x2 round tile on the left activates the rear light.









Big Boys had augers to feed coal into the firebox during regular operation (it would be impossible to keep up with the boiler's demands for fuel otherwise) but sometimes you still had to do it the old fashioned way.






















Highly sophisticated controls.









As promised, a picture of it on a curve. Yeah, it looks a little silly.































Comments

 I like it 
  February 3, 2014
Very Impressive, not many builders have the bricks to take on something this big or detailed. Have you heard about how the Union Pacific is working to restore one of the Big Boys?
  January 9, 2014
That's an awesome creation im 17 now and I loved that steam locomotive since I was 4. Keep up the good work.
 I like it 
  November 9, 2013
I love this engine! Did you happen to make instructions when you did this? I'm not so good at creating something this amazing myself :(
 I like it 
  August 14, 2013
om gosh this is actually my fav piece of train history!!! thanks for posting it
 I like it 
  February 28, 2013
Wow. Massive, enormous, incredible... words don't even begin to describe how amazed I am. Wow!
 I like it 
  January 11, 2013
My favorite train since i was 2. Love it. cant help it looking silly on curves, it is a big boy after all.
 I like it 
  September 7, 2012
Massive engine with great detail. Nice work!
  August 11, 2012
Amazing! I also saw the Big Boy in St. Louis. It's a monster. I guess you saw it at the Museum of Transportation?
Nathaniel Brill
 I like it 
Nate Skawinski
  January 17, 2012
AWESOME CREATION!
 I like it 
  December 27, 2011
Also another thing. I work at the Museum with the 4006 in St. Louis. Museum of Transportation. I run Live steam G gauge trains in the auto building. As well as O gauge and electric G gauge (Thomas the Tank for the kids).
 I like it 
  December 27, 2011
I'd pay at least $500. That great detailed locomotive is worth that much. Don't use power functions. Convert back to 9V. I did this with a custom steamer. First had 9V then power functions. It was very light weight. The locomotive refused to go on straight track. It preferred curves. When I put the 9V back in, it worked so much better. Plus w/ power functions it only ran backwards. :P After 9V motors went back in it fell off the track and broke into about a million pieces when it hit the concrete floor. Never put it back together. The loco was a 2-8-8-8-4. I haven't built a custom Lego train since. This happened 2 months ago.
  June 13, 2011
Love it! Do you plan on making instructions or a list of the pieces? Thanks!
 I like it 
  December 5, 2010
id pay $200 for it. 5/5
 I like it 
  November 13, 2010
Big, and packed with details.
 I like it 
  January 18, 2010
Wow, having seen one of these in person, I appreciate the perfection of this. Nice details and scaling.
 I like it 
  December 30, 2009
Wowie, it's darn big! The Big Boys are big, too!
 I like it 
  October 28, 2009
Very nice! I live near Omaha and work in Omaha and I get to see a new Union Pacific Train, and the Big Boy sitting on the side of a hill when I cross the bridge into Omaha, and this engine looks just like it!
 I like it 
  October 25, 2009
WOW ... that is Amazing ! ... i'm especially impressed by it being able to go around that curve !!!
 I like it 
  October 11, 2009
Amazing....
 I made it 
  October 4, 2009
Quoting Thomas Morse Great looking engine!!!
Thanks! I'm actually rebuilding it to run Power Functions now, so the tile boiler (which I also really liked) is gone, in favor of 3x1 curve slopes. The boiler is so big it is able to fit 2 XL motors, the IR receiver and the battery with ease. The tile boiler will live on in my UP 9000, though, where the PF stuff is in the tender. The windows are slid into the rails on the 1x8 plates with door rail above and below the windows.
  October 4, 2009
Great looking engine!!! I've seen some newer builders steel some of your techniques, but I love the driver action with plates and tiles and love the boiler built from tiles. That makes the model cheaper to build and still looks great. Great job. P.S. How are the 3 cab windows attached??
 I like it 
  July 20, 2009
cool this is my favorite train I have it in n scale and I made one on LBP if it were for sale I would buy it
 I like it 
  July 8, 2009
I love it! I am planning on getting into lego trains and i think im going to build a BIG locomotive for my track (when i get it), but i was hoping could you share those pictures? Oh, and im still confused on how you get the boiler looking so round...
 I like it 
  June 10, 2009
I LOVE THIS. If i were you, i would make a video of it running on track and post it along with it, that way we can all see it run. It would be wonderful.
 I like it 
  June 9, 2009
Just absolutely amazing. I am speechless.
 I like it 
  May 25, 2009
truly amazing build. and the fact that it can take the curves even more amazing. i cant imgagine the time you have into this.
 I like it 
  April 14, 2009
How did you do that?
 I like it 
  March 31, 2009
The first time i see this one. I have always admired the Big Boys, truly amazing steam engines. You have done a really good job on this one, a classic!
 I made it 
  March 24, 2009
Quoting Maxime MaxSamAlex You make me jealous. I tried to make one. First, I didn't have enough wheels so it was changed to the Challenger. Then, I ran out of pieces so it wasn't long. I couldn't put pistons. Then I tried to put pistons. It worked, but it didn't agree with the curves on the tracks. So now I really wonder how you made that.
Let's just say all that gave me a bunch of headaches. Getting the locomotive to not only go around curves, bt be loose enough so that the 9v motors can do it without the train stopping (especially at low speeds) took a lot of time.
 I like it 
  March 24, 2009
You make me jealous. I tried to make one. First, I didn't have enough wheels so it was changed to the Challenger. Then, I ran out of pieces so it wasn't long. I couldn't put pistons. Then I tried to put pistons. It worked, but it didn't agree with the curves on the tracks. So now I really wonder how you made that.
 I like it 
  March 15, 2009
A great representation of a highly complex machine. Union Pacific was the ONLY railroad to run this type of locomotive, Alco building 25 of them. Other roads may have called some of their larger locomotives "big boy" but UP had the only "BIG BOY".
Nathaniel Brill
 I like it 
Thomas N
  February 4, 2009
Amazing, I can't believe I didn't see this before, great work.
 I like it 
  February 1, 2009
Awesome! You should build more engines!
  January 22, 2009
Sorry,ive forgotten to rate. exactly 5 :-)
 I like it 
  November 10, 2008
Dude. One question... Can it go around corners?
 I like it 
  September 22, 2008
Wow... I just saw this on Brickshelf, and I feel that the title of best Lego Big Boy belongs to you. This is truly and extraordinary model. Keep up the good work!
 I like it 
  September 22, 2008
I studied this locomotive for built in 9 studs wide ... but I returned to my first love 141R "Mikado". I have only one thing to say very good job! I particularly love your design for the pistons and details from the front.
 I like it 
  September 21, 2008
I'm waiting for more pics, but I can already say that is the most awesome train I've seen here on MOCpage (with the one by Garth Danielson). Great !
 
By Nathaniel Brill
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Added September 21, 2008
 


LEGO models my own creation MOCpages toys shop Union Pacific Big Boy 4006Engines


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