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MOC: 4-4-0 American Engine


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#1 Daedalus304

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Posted 01 May 2012 - 04:39 AM

Hello again! This engine is one of my personal favorites that I've built, although the part count is lower and the build looks deceptively simple.

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Built with a lot of the same parts as two combined Toy Story engines, I'm aware that there are visually quite a lot of stylistic similarities. However, a closer look reveals that that's about where it ends as it's been entirely redesigned. (A big part of the reason I consider it a MOC and not a MOD or "kit bash".

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The wheels on the front truck are a bit larger than I would have preferred, although the lack of tiny red wheels plus my choice of articulation ended up making me decide to stick with the red wheels.

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The piston design is one that I've quickly grown attached to, after finding myself wondering one day if the 4L bars would fit into the bottoms of these cylinders. Turns out they fit perfectly, and taking that combined with track sprues and Tony Sava's awesome awesome idea to use the Minifig wrenches (As he did on his American engine). The result is a nice looking piston with almost no friction, and it's certainly one of the aspects I'm most proud of.

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The problem of how to attach the dome and bell was another one of my big challenges, as I was set on a properly rounded boiler and didn't want holes or gaps in the boiler itself. Looking at my reference picture presented a solution however, and the handrails came to save the day. There is a minimal gap which is virtually invisible from any angle other than this one, but it keeps the boiler visually intact and gap-less. The smokestack went through several revisions, as did the headlamp, but in the end I found a satisfying solution to the smokestack and I decided that a slightly modified versionof the TST's headlamp felt suitable enough.

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I removed a piston here to help highlight the method of articulation, which also went through a lot of revisions. It has more than enough swing to clear the pistons through any corners, and it's actually built so that the front truck is a plate lower than the rear wheels; which was deliberate for several reasons but mostly due to the engine's very low weight. In the end though, the engine runs very smoothly across any track combination and rolls so easily that any degree of incline sends it running off.

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The tender is very simple, but I tried to make it similar to the reference picture as much as I could. To be honest I'm not sure what the slope-y bit in front of the tender's water tank is for, but it was in my reference picture and added some visual interest so I added and kept it around.

The part count for the engine overall is under 300 pieces, and it was first real foray into learning articulation. In the end though, I couldn't be more happy with how smoothly it rolls and I'm very pleased with a number of the building techniques. This year I'll be displaying my engines at the Phoenix Comicon with the CactusBrick LUG, this engine is the one I'm going to be running most of the display; though most of my engines will be there. From that I should be able to get some running videos.

That's all for today! My latest engine is holding on a very slow bricklink seller, but it should be posted soon.
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#2 LEGO Train 12 Volts

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Posted 01 May 2012 - 06:03 AM

Wow this is absolutely perfect!   *oh2*
Clever building technique and beautiful decals!  :thumbup:
Thanks for sharing!  :wink:
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#3 jonwil

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Posted 01 May 2012 - 06:18 AM

Nice job on the 4-4-0, looks just like the real thing.

#4 patje

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Posted 01 May 2012 - 08:14 AM

nice train

beautiful idea to place  the first wheels this way to the body
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#5 pinioncorp

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Posted 01 May 2012 - 09:32 AM

I really like this, it's colourful but adult sized and cleverly built. The only thing I dislike is the windows, I think that they're too big. The 2×1×2 windows would look more in proportion, with the cab lifted up one plate.

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#6 Man with a hat

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Posted 01 May 2012 - 12:07 PM

Nice creation.
I have to say I immediately thought of the Toy Story train, but this is way better.
And you did a great job on the pistons. Really clever.

#7 TheBrickster

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Posted 01 May 2012 - 01:44 PM

Outstanding D!  This is my personal favorite of your LEGO Trains so far.  Vivid choice of colors and a great overall design. I really like the piston/wheel assembly always posing a challenge for building with LEGO.  Great job! :thumbup:

#8 Sir E Fullner

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Posted 01 May 2012 - 01:56 PM

That looks very impressive!
You know, it almost reminds me of the Southern Pacific Railway's engine Jupiter. :sceptic:

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#9 Daedalus304

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Posted 02 May 2012 - 10:22 AM

Thanks everybody for your comments, I very much appreciate it! I'm very glad to see that you all like the piston design!  :sweet: Plenty of the building techniques were the result of "Eureka!" moments when I was pondering build problems at work.  :laugh:

View Postpinioncorp, on 01 May 2012 - 09:32 AM, said:

I really like this, it's colourful but adult sized and cleverly built. The only thing I dislike is the windows, I think that they're too big. The 2×1×2 windows would look more in proportion, with the cab lifted up one plate.

I'd been on the fence regarding the windows myself, however the cabin floor is actually a little lower than the red walls would make it seem so as to help line it up better with the tender, and my particular 4-4-0 reference picture did have rather large windows. I'll probably tinker with some smaller windows though and see how it goes, it should be easy enough! Thanks for the suggestion!
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#10 Pencil_42

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Posted 02 May 2012 - 03:52 PM

Clever design and a nice inspiration - thank you for sharing!
Like others have said, that's a neat idea for the pistons.

Curtis

Edited by Pencil_42, 02 May 2012 - 03:53 PM.


#11 domboy

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Posted 02 May 2012 - 06:37 PM

Funny, just the other day I was wondering to myself if anyone has found a use for the pins that hold the track pieces together (track sprues I believe you called them), and voilà! I can't tell, is this powered in any way?

Edited by domboy, 02 May 2012 - 06:38 PM.


#12 Daedalus304

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Posted 02 May 2012 - 07:03 PM

View Postdomboy, on 02 May 2012 - 06:37 PM, said:

Funny, just the other day I was wondering to myself if anyone has found a use for the pins that hold the track pieces together (track sprues I believe you called them), and voilà! I can't tell, is this powered in any way?

I've been saving the pins/sprues since I first got some track since I noticed they could still fit into clips and such; but I never actually knew what to use them for until I needed a 5L bar for my pistons.  :laugh:  Certainly glad I held onto those!

And no, it's not powered at all. The body of the loco is so small that there really was no room or way to fit any sort of motor in there without stuffing it into the cab, so it's just a push engine. That was one of the big reasons I tried to bring down the running friction as much as I could.
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#13 kzv

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Posted 04 May 2012 - 08:54 AM

Nice classic looking train!

#14 The Rip

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Posted 11 May 2012 - 01:09 AM

Very nice. keep the trains rolling in!
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