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MOC: Power Functions Intercity Train with Automatic Sliding Doors

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#1 Esben Kolind

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Posted 10 April 2011 - 12:33 PM


This MOC is my third attempt to incorporate automatic doors in a 6-wide train.

My Power Functions High Sped Train with automatic doors featured a simple design with a single pivot point, while the Power Functions Commuter Train with automatic sliding doors had actual sliding doors as well as retracting stairs.

This time, my goal has been to simplify the basic design of the door opening mechanism of the latter and expand the functionality to several cars without compromising the design and the interior.

The two minute video shows the result as well as some footage of how the mechanism works. More pictures and detailed explanation below.

All pictures in this Brickshelf folder (after moderation)

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The train

The train consists of four cars on shared boogies. All PF equipment is hidden in the front car (36 studs), the two center cars are identical (28 studs) while the end car is a shorter version of the front car with full interior (32 studs).

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The front

The curved front features working headlights and cabin light for the driver. The lights are placed behind a 4 x 6 wind screen.

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The cars

The cars have a sliding door on one side and full interior.

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The door opening mechanism only takes up a 1 x 1 column inside the passenger cabin.

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The roof of the train is taken off in one piece.

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PF battery, ligths and M motor hidden in the front car.

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From below

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More construction pictures can be found in the Brickshelf folder.

So, what do you think of it?


#2 MetroiD


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Posted 10 April 2011 - 01:17 PM

See it on Classic-Town.net

I was pretty certain you'd continue developing this idea and I must say it has come a long way, especially in terms of design. Your initial opening-door PF mechanism and train was awesome, but this one is even better. The fact that you've managed to provide 100% functionality and still keep as much of the interior as possible is awe-inspiring!
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#3 AussieJimbo


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Posted 10 April 2011 - 01:29 PM

Fantastic work.

The train looks great in it's own right and the compact automatic door mechanism with it's articulated power supply is magnificent.

Excellent stuff.

:classic: :classic:

#4 Toastie


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Posted 10 April 2011 - 01:37 PM

 Esben Kolind, on 10 April 2011 - 12:33 PM, said:

So, what do you think of it?

Hi Esben,

here is what I think: F - a - n - t - a - s - t - i - c. This is ingenious. No other thoughts ...

The first two versions already took my breath, particularly the retracting steps. I didn't think it could get any better. Seeing this now: I was wrong. Wow, I love that entire mechanism. Brilliant.

:wub:  :wub:  :wub:

Best regards,

#5 lightningtiger


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Posted 10 April 2011 - 01:49 PM

Your design 'Esben' combines AWESOMENESS and GENIUS in one creation, I tip my MOC-builders hat to you, a clean and well working automotive door system, the train itself is nice too ! :wink:
Brick On 'Esben'.....totally Brick On ! :grin:

#6 seb/vdn


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Posted 10 April 2011 - 02:29 PM

Hi Esben,

Fanstatic ,is a little words, i think it's a very,very nice work.
You idea for the doors is very good and the design of you intercity train is great,i like it !


#7 ManitobaMoe


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Posted 10 April 2011 - 03:48 PM

That is awesome. Was wondering how you did it so thanks for showing us and sharing!!

#8 L@go


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Posted 10 April 2011 - 04:15 PM

This design is simply brilliant, and brilliantly simple. Looks great. Congratulations on a job very well done!

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#9 henryhotspurs


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Posted 10 April 2011 - 04:29 PM

Certainly, you must be one of the great Lego mechanical builders of all time.  The mechanism is brilliant, the application is flawless and the functionality of the MOC is intact.  Too many times I have seen MOC's that are so complex they cannot be played with or they barely resemble their inspiration because of the gizmos, wires or batteries.  You have beaten these considerations admirably.  Congrats!

#10 laka


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Posted 10 April 2011 - 05:38 PM

I just can add the same words: Fantastic, brilliant, amazing... This design should be built into all passenger trains.
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#11 Glenn


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Posted 10 April 2011 - 05:52 PM

Excellent. Amazing. This truly highlights the interactive nature and endless possibilities available with LEGO trains. Fantastic in its mechanical ingenuity whilst maintaining the overall aesthetics.

#12 marsupilami


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Posted 10 April 2011 - 07:51 PM

This is brilliant, thanks for sharing how you did it. It makes running trains even more dynamic than it already is.

Keep up the good work :-)

#13 cimddwc


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Posted 10 April 2011 - 08:03 PM

Really fantastic! A great looking train with an even greater mechanism. :thumbup:

#14 Asper


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Posted 10 April 2011 - 08:19 PM

Even without the opening doors it would be a beautiful train. But the doors are brilliant!

#15 382nd Legionnaire

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Posted 10 April 2011 - 08:52 PM

wow, this is excellent on another scale. You even managed to minimize the PF space for the minifig space. Keep up the good work.

#16 Fuzzylegobricks


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Posted 10 April 2011 - 09:00 PM

I love your trains that have this awesome function! And the train it self is great besides the function. This morning I saw that on Youtube. I keep watching for your trains! :sweet:
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#17 Younge


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Posted 11 April 2011 - 11:18 AM

Truly a work of creativity and Lego engineering ingenuity!!! Well done!!! I love the fact that it only takes up a 1x1 brick area on the "x" plane (obviously a bit more space is used on the "y" plane with those Technic parts).

I would love to rip off your design and use it on my own MOC, but I wouldn't know where to start!!! Saying that, I can see TLG actually pimping your idea for a future passenger train set. You know what they say - imitation is the best form of flattery!!!
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#18 electrorock


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Posted 11 April 2011 - 12:18 PM

 382nd Legionnaire, on 10 April 2011 - 08:52 PM, said:

wow, this is excellent on another scale. You even managed to minimize the PF space for the minifig space. Keep up the good work.
I am totally inspired on every level. Do you have step by step instructions?

#19 Kridge


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Posted 11 April 2011 - 02:53 PM

Brilliant TOP MOC.
Never saw that before.

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#20 Esben Kolind

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Posted 11 April 2011 - 05:38 PM

Hi all,

Thanks for your nice comments. I must admit that I am pretty happy with the result too  :blush:

 electrorock, on 11 April 2011 - 12:18 PM, said:

I am totally inspired on every level. Do you have step by step instructions?

Nope, no instructions. But I have taken a number of close-up pictures of the construction in the Brickshelf folder (now public). That should enable you to re-create the basic functionality if you wish.


#21 Duq


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Posted 11 April 2011 - 06:45 PM

The drive shaft with the universal joints in the roof is a stroke of genius!
If at first you don’t succeed, call it version 1.0

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#22 Treadwah


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Posted 11 April 2011 - 10:43 PM

An inspiration to us all. So compact! Bravo.

#23 Bojan Pavsic

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Posted 12 April 2011 - 07:05 AM

Really A-W-E-S-O-M-E!!! I was toying with the idea of opening doors on a train, but i always ended up with a non-lego solution using an micro servo motor... But this... /bow
There's always a way to include Technic in any Lego creations.

#24 JopieK


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Posted 12 April 2011 - 07:55 AM

Very nice, very neat idea those automatic doors!!! It is a nice train in general as well.

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#25 miies


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Posted 12 April 2011 - 10:25 AM

Hi Esben,

I too have been following your designs and this is a great next step, good job!

A possible new challenge, perhaps? Create opening doors on BOTH sides of the train (as far as I can see, your design already has the room for it), and make it possible to open them independently from one another, just like real life trains. :)


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