Questions tagged [trains]

A popular choice among AFOLs for building their own creations, Trains are now a sub-theme of LEGO City.

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7 votes
1 answer
424 views

What prevents a 12V motor, when pushed by hand, from providing DC electric out?

This question is somewhat related to a similar question I asked about whether pushing a 12V train motor (such as the one below) would damage it. See title "Set 7865: six wheeled Lego® train motor (...
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7 votes
2 answers
379 views

How can the new LEGO pneumatics be used for trains?

LEGO came out with new pneumatics. Since I'm a train guy (my wife is more into technic and already saving money for the Mercedes ;)) I was wondering, how could we apply the new things for Trains?!
4 votes
2 answers
1k views

How to run two LEGO electric trains at the same time?

I have a LEGO city built with a train encircling it. The track is the classic style with metal railings running through it. I have a switch track as well that is connected to an NXT robot to switch ...
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6 votes
1 answer
794 views

How did the LEGO 7862 Remote Controlled Decoupling and Signal work?

I've never seen this set in person, although it appears occasionally in 12V Lego train system images. I've never seen it used, or described. How did the LEGO 7862 Remote Controlled Decoupling and ...
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6 votes
1 answer
518 views

Will playing with a 12V train motor by hand damage it?

This question is similar to one for PF motors. The 12V motor bogie has considerably more resistance than does the newer PF bogie motor, which may be moved very easily when not operating. So, if one ...
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9 votes
3 answers
5k views

How many flexible tracks does it take to make a complete oval?

I have couple of straight tracks, no curved tracks, so the only option now from me is to buy the new 7499 straight + flexible tracks. Therefore: How many boxes of 7499 tracks do I need to make a ...
14 votes
2 answers
1k views

Trains overview image

I'm looking for an overview image of all trains ever released by LEGO. With trains I mean train sets containing locomotives and wagons that run on train tracks. There is a beautiful image from Jeroen ...
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5 votes
2 answers
2k views

Is this a real Duplo Train Base or fake?

I'm new to LEGO, so forgive me if this is a simple question. I purchased a lot of 30 Duplo Train Base from eBay. Below is the picture that accompanied the listing. There is a disclaimer stating: (...
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5 votes
2 answers
4k views

Is it possible to run more than two remote control trains on one track?

My son has two passenger trains and a lego cargo train. We can get two trains running on the track using one remote. But how do you operate a third train? We do have other remotes which came with ...
8 votes
1 answer
2k views

Which train motor is more powerful, 9V or 12V?

I recently picked up LEGO bricks again and due to lack of space I'm planning to build a multilevel train layout. I do have a descent amount of 12V track along with trains and switch points, but I was ...
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8 votes
6 answers
39k views

Lego remote controlled cargo train not working

I've helped my son put together the Cargo Train set (60052) but now we can't get the remote control to work. It all looks like it's been assembled correctly with new batteries put in, but it doesn't ...
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5 votes
1 answer
408 views

Why is there no set with much RC Straight tracks?

after visiting many Lego events (brickmania, antwerpen, BE), I wish to expend my train layout much more than adding a box or two of 7499 ... Why does Lego didn't released a set with, for example 24 ...
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5 votes
2 answers
4k views

How can I prevent my train from derailing?

I have motorized the Constitution Chase train by putting a PF train motor into the coal car. I disassembled the rest of the cars, down to the car bed, and let my kids build whatever train cars they ...
13 votes
6 answers
3k views

Can I build a faster LEGO train motor?

I was going over LEGO Power Functions train motors, and I was not satisfied with the speed. Speed seven is fast enough to derail the train on the curve, but not fast enough realistically. I am ...
8 votes
2 answers
2k views

What are the largest LEGO® Power train sets available commercially [Oct 2014]

What set(s) are the largest by number of pieces? These sets could be retired or existing. I am also curious what set(s) have the most rails pieces included.
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7 votes
3 answers
914 views

9v and Power Functions Hybrid?

I am building a train layout and I am running some of my track through a tunnel. I would like to know if I could hook up a 9v train motor at the opposite end of my train. The front will use Power ...
1 vote
1 answer
274 views

Is it possible to use a LEGO NXT ultrasonic sensor for a LEGO train crossing?

I was looking at LEGO NXT components, and I found the ultrasonic sensor. I was wondering that if I put off to the side of the track, the nose of my train would activate the sensor, thus operating the ...
3 votes
0 answers
43 views

Train track switching using servo motor [duplicate]

My project requires using a servo motor for switching track. It needs to be automate switching points. Is this possible? What is the cheapest / easiest way of achieving this?
5 votes
1 answer
1k views

How to build an automatic Lego train system?

I was wondering if anybody has ever tried using the IRLink NXT sensor to make an automated train system and if so, what kind of setup did you have to make it all work? I have been working on a train ...
9 votes
3 answers
3k views

Ideas to slow down RC PF train motor (Item: 88002)

I'm wondering if you already tried to slow down such a motor. I would like the train to run slower at all the supported 7 speeds. Anyway, at speed 7, the train just flies off the tracks.
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7 votes
1 answer
488 views

What exactly is this Lego train motor?

I bought this in the early 90s as a spare, since the type of Lego train was being phased out. Presumably the old 12V system. The original train was given away but I still have this. I want to sell ...
5 votes
1 answer
1k views

Small LEGO train sets on narrow gauge track?

Will LEGO sets such as "LEGO Christmas Train" 40034 or "Emerald-Express" 31015 run (manually) on narrow gauge LEGO track? These sets use a wheelbase that is only 4 studs wide and wheels that have a ...
4 votes
1 answer
639 views

Will LEGO Caboose (10014) work with LEGO Cargo Train (7939)?

Will the older LEGO Caboose (10014) work with the LEGO Cargo Train (7939)? I wonder if it will fit the newer track and if the magnet couplers will still work?
32 votes
2 answers
40k views

What different types of LEGO train tracks exist?

I would like to purchase some used LEGO train tracks off of ebay. I am not, however, very familiar with the different choices of track systems are out there that I might come across. So I would like ...
12 votes
3 answers
7k views

Software to do Duplo train track layout?

Anyone know a way to create with a software DUPLO train track layout? The only thing I found is: http://www.anyrail.com/index_en.html It's a bit overkill for what I need and it's $US60, although ...
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13 votes
1 answer
2k views

What is the centre hole for in modern train tracks?

LEGO train tracks have 3 holes in each of the segments: I understand the two outer holes are used with a throw-away piece to keep them stacked while shipping, but what is the center hole for? Is it ...
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10 votes
2 answers
3k views

Battery for Trains

For those who have tried, which one is a better option: Rechargeable Battery Box and Transformer/Charger 10VDC ($50 + $25) or AAA Battery Box and a lot of AAA batteries ($13 + ?) Obviously $75 is ...
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9 votes
1 answer
4k views

LEGO Trains 12v: Identify This?

This is a very popular picture, which almost all LEGO Trains' fans from the 1980s would recognize. I have the train in the foreground, 7740, but not the 4th car (the red one). Can anyone please ...
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12 votes
1 answer
2k views

What is the maximum distance between fixed train wheels?

I'm working on a train, and I'm curious what the maximum distance is between fixed wheel sets in order to properly navigate all of the different types of track (straight, curved, switch, flex, etc). ...
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13 votes
3 answers
8k views

Can I use the old 4.5V and 12V blue/gray era rails with newer trains?

I have a bunch of old 12v track. I am looking to get my son into LEGO, but I am thinking of getting the remote set so we can expand it some more. My question is, can I connect the new track to the ...
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2 votes
1 answer
655 views

Pushing LEGO city train [duplicate]

Are you able to push the LEGO city train around the tracks without damaging it or do you always have to use the batteries to make it go?
16 votes
4 answers
37k views

What advanced railroad features are possible with the Lego PF train sets?

I recently got my first train set, the Constitution Chase, and it has sparked my imagination for building train layouts. My 3-year-old son has a small collection of wooden trains and we enjoy building ...
9 votes
3 answers
3k views

Simplest approach for rail sets automation

How would you tackle the automation of a lego rails set. I am looking for a solution that can be achieved with available parts. From the answer I will chose either to invest into lego rail sets for ...
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11 votes
3 answers
923 views

Are the blue and grey 12v train system compatible?

Are the two generations of 12v train compatible? Eg can you combine a "blue" remote controlled point and a "grey" 12v transformer? Main motivation for this: I have a complete "grey" set of trains, ...
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16 votes
2 answers
2k views

Will playing with a PF train motor by hand damage it?

If one pushes a PF-motorized train by hand, will it cause damage to the motor, or any of the other parts (IR Receiver, Battery box)? It is essentially working as a generator when turned by hand, so ...
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7 votes
2 answers
2k views

What is the difference between the two train motors 8866-1 and 88002-1?

At the Lego store the other day they were talking about a "more powerful" train motor for the Maersk train (I was asking about adding a second motor to the red cargo train so it would go uphill). But ...
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11 votes
3 answers
1k views

What was the 12v AC socket for on the 7864 transformer?

The 7864 transformer had, in addition of the main regulated outlet for controlling trains and a fixed 12v DC for plugging in remote controls and lights, a third socket available which provided 12v AC. ...
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14 votes
2 answers
10k views

Do regular Lego trains fit onto Duplo tracks?

I have a small kid and a bunch of LEGO Duplo train track. (Like what's in this set.) Would "grown up" sets, like the Emerald Night or Maersk trains, work on that track? They look pretty close (the ...
12 votes
1 answer
5k views

How many hours of travel does it take to wear out LEGO monorail tires?

I've seen some pretty impressive LEGO tire driven/cushioned monorail displays that put miles of wear on the track and the train cars that ride on it. I'm hoping a monorail expert can tell me (about) ...
10 votes
2 answers
1k views

Alternative (back of box) builds of 7822 Railway Station - is there an 'official' configuration where the track terminates at the station?

I am looking for a scan or photo of the back of the box of the 7822 Railway Station Background: As is common with Lego sets, there are a number of alternative builds pictured on the back of the set ...
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12 votes
1 answer
850 views

How can the 12v Train 7823 Container Depot be used to load container ships as per Lego Catalogue

As I kid I was always confused by the description of the 7823 Container Depot in the Lego Catalogues: ..."The crane can be raised so container ships can be loaded." An example can be seen in this ...
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7 votes
2 answers
1k views

Is the Lego 8884 IR Receiver compatible with earlier IR Speed Remotes e.g. from set 7897?

I'm thinking of buying the new Train power function, e.g. 8884 IR Receiver, 88000 Battery Box, and 8879 IR Speed Remote. However I already have the set 7897, is the Speed Remote from this set ...
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22 votes
3 answers
7k views

How to build bridge using 4.5/12v train rails from 1969 Lego brochure

I am interested in building a bridge for my layout and stumbled upon this forum post in which user 'Istokg' posted a picture of a train bridge made from the blue rails used in the pre-1980s train sets....
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5 votes
1 answer
248 views

Measurements (LDU) of Lego tracks Set 151

I have an old set of 7851 curved tracks. I want to use the outer tracks (the ones with the bumpy surface). If I was to put one end down on a baseboard so that is tangent/parallel with the grid of ...
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15 votes
3 answers
9k views

What's the best way to link two (or more) LEGO Power Functions (PF) train motors together?

Last Christmas I built an extended Emerald Night train to run around the tree. To get it to work I had to add a second Power Functions motor. I tuned both IR receivers to the same frequency and slowly ...
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10 votes
2 answers
4k views

How does the cost of a LEGO railroad compare to a traditional scale railroad layout?

How do the costs compare between a railroad layout constructed with LEGO trains and a nearly identical layout using traditional scale models, such as HO?
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11 votes
1 answer
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What is the difference between train motors 88002 and 10153?

I want to motorize my Santa Fe Super Chief. Its original instruction mentions 5300 but it's marked obsolete on BS.com and now re-released as 10153. In the same time 88002 costs few times less, e.g. $...
9 votes
4 answers
3k views

Are there plans to release new trains for AFOL?

I just built the Maersk train, what an amazing model! I did a little research and found that it was released in 2011 and the Emerald Night was released in 2009. Given the two year gap it seems ...
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6 votes
1 answer
1k views

How hard is it to convert the new(ish) RC/PF trains to 9V?

I have a HUGE investment in 9V trains (think many thousands of USD) and was wondering how difficult it is to convert the newer RC/PF train systems over to 9V motors? Do the 9V motors fit? Does the ...
8 votes
1 answer
1k views

How do the train wheels turn so smoothly?

After assembling a train or its companion wagons, I'm always impressed at how smoothly the wheels glide over the track. When putting them together, it's just a metal axle with two wheels on each end ...
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