I would recommend BlueBrick, which is a versatile LEGO layout editor by Alban Nanty.
Apperently it has Duplo parts too, so I believe it should meet your needs. It can actually do much more for your layout planning needs (including modular tables if your club has some, for example), so maybe you'll consider it overkill as well, but since it's specifically ...
Here's what I came up with:
The key element I used is the hose nozzle (60849):
I opted not to use hinges to try to create as rigid of a connection as I could. Here's the build:
This seemed to work fine in the small amount of testing I did, but it does require a bit of careful adjusting to get everything aligned properly initially.
Thanks for all your contributions that helped me a lot and gave me very good pointers. Here is my final solution I will use:
I'll use Pneumatic T Piece First Version (T Bar) on Hinge Bricks 1 x 2 Base and Top. To avoid unintended "hinging" of the hinge bricks I put a plate 1 x 2 and a tile 1 x 2 beside them and a Hinge Plate 1 x 2 with 3 Fingers On ...
You can buy tracks directly from LEGO. You go to LEGO service web page and follow steps below:
Click on BRICKS & PIECES just below the banner
Then BUY BRICKS
Provide your age and location (please be aware the list of countries where LEGO is shipping to is limited)
On the left side you have an option to chose parts from particular set. In this case use "...
Warning: LEGO pieces were harmed for this answer
How the switch works
So, how does it work then? Well, let's open it up!
The back plate is held into place by 14 pins. We'll carefully pry it open with a knife. Alternatively, we could use a drill bit to slowly scrape off the pinheads.
Both methods are destructive. The back plate needs to be glued back on ...
It hasn't been officially announced yet, but there are at least four large LEGO DUPLO train sets coming this summer. This includes two extension train track packs with straight tracks, curved tracks, switches, bridges, and train crossings. The two full train sets will include more of the same tracks. The set numbers for the extension packs are #10872 and #...
The speed regulator light being on is a good start. It looks like you have things set up correctly as far as I can tell.
The first step is to identify which part is having issues. All of these parts can be purchased on Bricklink, so once you know what has failed, you can replace the defective part.
Here are some ideas for testing components:
If you have a ...
The caterpillar track and belt are both fixed length pieces.
I would recommend the more versatile #57518 'Technic, Link Tread Wide with Two Pin Holes'. The part can be used to make a track as long as long as you like.
The tread is compatible with:
#57519 - Technic Tread Sprocket Wheel Large
#57520 - Technic Tread Sprocket Wheel Small
Such place indeed exist and it is called Bricklink, a website dedicated to trading LEGO items. It has extensive history and great catalog of LEGO items found on the internet. Prices and quality are, usually, far better than you would find on eBay. And as an extra bonus, there are sellers from all over the world, so you are not limited to you own region.
Roller-coaster tracks are using rails in common LEGO measurement of 3.18mm. Also referred as bar. There are plenty of other elements having bars of this size. I don't have exact solution, but you could give a try with either of two types of Plate, Modified 1 x 2 with Bar Handles. These have 2 studs long bars, so would fit in your gap.
It depends on your goal, as Jason said. He illustrated pretty well why out of the package lego trains don't run on duplo track. However, if you just want something for your kids to dink around with, it is possible to build a wheeled train that will drive on duplo track without using a duplo train as it's base. The trick is to use monster truck tires or "...
All 3 of the sets you listed actually use the same type of tracks, they are Technic, Link Tread Wide with Two Pin Holes #57518.
In my opinion this type would be your best option for driving a robot for a number of reasons:
Since they come as links the tracks can be made any length you want, allowing a lot of flexibility in designing the robot. These are ...
The set is from the "RC / Power Functions Era", so it's meant to be compatible with those tracks.
Luckily for you those are the only tracks for sale in ordinary stores today.
As the answer to that question says, those tracks have "roughly the same mold" as the 9V track so the train is as compatible with those - I've also seen an Emerald Night set equipped ...
There's an article about this topic in the November 2018 issue of HispaBrick magazine.
In addition to a nice interview with the designer (Masao Hidaka), the article shows off some of the techniques used for building the rails:
Technically, the design matches most of your specifications.
It even includes a rather complex motorized switch:
Here's a ...
TLDR: Scale for train MOC is a personal preference based on the needs.
There is a lot of personal preferences here. Like, how do you decide if the LEGO track geometry should translate to standard gauge? Why not any other track gauge available in other countries? How do you scale the model if it originally use slightly wider gauge? So there'...
While I can't speak of the handling of these parts, the possibility of receiving official replacement parts from TLG is surely zero. That leaves us only the second-hand market, which fortunately offers genuine LEGO replacement pieces, sometimes even in brand new condition. Note though, that even though the brittleness problem might stem from lots of play or ...
It looks like the best practice is to adjust the proportions to the constraints imposed by the media.
For example, the closest LEGO rendition of a modern high-speed train, the 10233 Horizon Express has cars that are built on a 6x28 chassis piece, which gives a very different width-length ratio than the ICE2 (3.02 m : 26.40 m). And it just works and looks ...
There's already a good answer for where to get the track pieces, so I'll tackle the reset.
Also, since I don't have any brick, what set of random blocks, for the support structure, is better?
If you are relatively new to building with LEGO, building a custom roller coaster design may be a really difficult first challenge.
There aren't any official LEGO ...
Okay, this post is closing in 2 years old, but I have found it looking for a solution to my problem, so others may find it too. I found out two important things:
You don't need to cut or drill the switch to get to the offending spring. You can lift the pivot peg out getting at it from the top.
If the spring is FUBAR or missing, you can actually 3D print it.
If there is a suspicion that the metal surfaces have developed dust and grime or any other insulating layer, a solution would be to give the tracks a Brasso (or other metal polish) wipe and quick rinse and dry with water. Also give the train motor wheels a wipe of the same polish.
Also check this YouTube video https://www.youtube.com/watch?v=RCda7voqyUY
This issue is one of LDD's most prominent shortcomings. Unlike other CAD software, the simplifications that LDD makes in exchange for ease-of-use restrict some creations from being assembled with any degree of ease. However, the treads in this model are possible to apply, although I cannot say how easy it would be to get them the way you would want.
A quick ...
Thanks for mentioning our macOS apps!
You can also use our free app RailModeller Express for LEGO Duplo trains: http://www.railmodeller.com/express-edition-en.html
For iPads please check our new iOS app: