Questions tagged [building]

Interested in building techniques? Then this is the tag for you.

Filter by
Sorted by
Tagged with
16
votes
2answers
4k views

How can you make a hip holster for minifigs?

Is there a way to create a holster of some sort so you could attach a LEGO pistol to the side of a minifig, around the hips?
5
votes
2answers
356 views

How to locate pneumatic leak

I have a simple pneumatic claw with a 2 pump compressor that I built somewhat recently. It worked fine for a while, producing up to 4 bars of pressure, but then the system wouldn't increase the ...
7
votes
2answers
5k views

Is this assembly legal?

This question might be strongly opinion-based, but I also think it might be interesting. I know there is a guide for Lego builders to decide if their build is legal or not. However, the cases of this ...
0
votes
1answer
60 views

My Mindstorms Spik3r can't turn around

When I use the button for turning it just goes backwards. Why does this happen? I've checked the instructions and didn't find anything.
4
votes
2answers
320 views

Which parts have no-friction Technic axle holes?

I want to make a no (or very low) friction inline coupling for axles. The axles must turn, transmit moderate torque, and be in phase (therefore backlash must be minimal). The axles remain inline at ...
1
vote
0answers
71 views

All terrain crane 42082 [closed]

The wheels don’t go round after the first book is finished. Has anyone else had this issue? What did you do to fix it?
5
votes
2answers
2k views

How create a custom Roller Coaster? Where I can get the track pieces?

For some random reason, I watch some videos on YouTube showing a "Roller Coaster" built using Lego. I never enjoy to follow Lego instruction, and I always prefer to build something my own, mixing any ...
4
votes
3answers
258 views

How to eliminate a gap of an offset in a corner

So I need to build a layer with offset bricks, which I have managed to figure out. However, the corner is a problem. The dark bricks in my pic need to be in that position. How do I fill the gap ...
6
votes
2answers
1k views

What are some LEGO Christmas trees designs I can build?

It's Christmas time, and I'd like to build a Christmas tree to add to my winter scenes. Unfortunately the large LEGO pine tree is a little small, and also doesn't offer much by way of decorating ...
5
votes
2answers
77 views

Going from LDraw/LeoCAD to Physical Set

Once I've designed a MOC using either LDraw or LeoCAD where can I go to get the bricks I need to then build that set in the real world? I've been poking around forums for an hour now trying to get ...
5
votes
1answer
366 views

Trouble with 42110 Land Rover Defender transmission

I just got the 42110 Land Rover Defender and assembled bags 1 and 2. I tested everything before joining the front axle and rear axle, and the friction was quite low, not nearly high enough to get ...
3
votes
1answer
171 views

Lego Classics alternative

I've been looking at buying one of the classics sets for my young kids. My desire was to have a large collection of bricks that they could build houses/cities/etc with. I thought that the Classics ...
2
votes
1answer
100 views

How to make a RPG (Rocket Propelled Grenade)

I don't know if this is of-topic or anything, but: I have a big scene with cops and stormtroopers fighting. And the cops need some stronger weapons than some sub-machine guns. So i was wondering if ...
-1
votes
1answer
97 views

Ideas to help develop a child's engineering skills?

My son is 7 yrs. old and has really creative ideas with his bricks. I see it challenging him and wonder, "How can I help develop his product engineering/design skills?" What kind of tasks can I give ...
13
votes
2answers
2k views

How is this kind of structure made?

Recently I found a MOC made by Headzsets from Instagram, in particular this interesting structure from his EVA work. Here is a picture of his structure: (https://www.instagram.com/p/BtCymDRHJx6/) ...
4
votes
0answers
230 views

Building techniques for designing a LEGO City Street scene?

As the question suggests... I'm trying to build a city street in "midiscale" similar to that of Hong Kong, but I have no idea on where to even begin with something like this. This project is being ...
4
votes
0answers
202 views

How to build an arch that is angled out of Lego?

I am currently working on a MOC for the USS Orville and I am trying to figure out the engines. I have gone through a couple of iterations on my current version, but it always buckles under its own ...
3
votes
1answer
233 views

How to build a waterproof roof out of LEGO blocks?

How would Lego blocks be tiled to provide a water proof roof against the rain? The lattes or internal support structure of the roof doesn't have to be also made of Lego. Basically the tiles on a roof ...
5
votes
1answer
178 views

What techniques can be employed to build a low-profile sliding door/wall?

I'm looking to build a sliding door or wall that doesn't use the defacto "sliding door" parts, 2874 and 4511. These parts are almost usable for my design: they are thin and have a built-in stopper ...
1
vote
2answers
120 views

Looking for sets with lots of printed parts or other special parts to use as components for my city

I'm thinking about building an early 20th century ('30s / '40s) European city, using both complete sets and parts of sets as resources I'm looking for pieces that add detail to this city, both ...
1
vote
0answers
54 views

Custom extension cables for Light Stax?

Recently, I got the S-12012 Light Stax kit with 50 (!) light bricks. They are different from those described in this question, but they are much cheaper, colorful and with blinking/pulsating effects. ...
3
votes
0answers
251 views

How can you get the pipes on Steamboat Willie to work reliably?

We recently began building 21317 Steamboat Willie. We've got it mostly built, but the pipes keep getting stuck. The rear one works, but the front one keeps getting stuck up and won't go down. We've ...
8
votes
2answers
385 views

Has the building technique of Technic pins in a brick cylinder been used in an official set?

One of my favorite building techniques is to place a Technic pin into the anti-studs of a brick. This allows two bricks to attach bottom-to-bottom. It's a pretty secure connection, but I'm not sure ...
4
votes
1answer
169 views

Is it possible to build 3 or more concentric circles / nested circles / telescoping pieces?

There are round 2x2 pieces. There are round 4x4 pieces with round 2x2 holes, the 2x2 can slide/rotate inside of it. There are "macaroni" pieces to make an 8x8 circle with a 6x6 hole. But are there no ...
4
votes
2answers
181 views

Best Way To Make This 8x8 Grate Plate Flush With The Wall?

I would like to use the 8x8 grates on the side of the building (studs out) as window pieces so there is nothing behind them. I'm wondering if there is a better way to have a more stable connection. I'...
6
votes
2answers
125 views

Mecha Rail Launchpad Building techniques?

Another mecha question, but this time, at least I think, is not so intense as my last question. I've decided to take my biggest and most ambitious LEGO project yet, a custom MOC of a Pacific Rim ...
2
votes
1answer
356 views

Where is an instruction sheet for Ausini set 25418 guitar?

I bought an Ausini brick set AUS-25418, which is a guitar, however as cheap as it was the price, it didn't have the building instructions, at least it looks like no piece bags or stickers are missing. ...
5
votes
1answer
165 views

Building advice for “hunched” mech lower torso design?

Another mech based question, let me clean up as best I can... So, in LDD, I'm working on an Evangelion Unit from the popular manga and anime, Neon Genesis Evangelion, and have decided to build EVA ...
4
votes
1answer
245 views

I'd like to build a mechanism to press buttons on a remote control. What is a good basic approach to use?

I have a small remote control like device with about 11 buttons. The centers of each button are placed about 1.1cm apart, and each are about 0.7cm in diameter (this means about 0.4cm between the edges)...
0
votes
1answer
983 views

My Lego Technic 42082 wheel stuck and can't move [closed]

After I finished my 1st manual book, I found out that my crane wheel can't move. May I know which part that I did incorrectly?
8
votes
4answers
398 views

How can I assemble 2 opposing gears so that the axle rotations are perfectly parallel?

Due to the way all the modern LEGO gears are perfectly quarter-turn symmetrical, there doesn't appear to be any way to assembly 2 opposing gears such that I get a 2 perfectly parallel axles. This ...
1
vote
0answers
63 views

What can I do with all my brick separators? [duplicate]

Since LEGO has started adding a brick separator to each of their larger sets, I have more brick separators than I know what to do with. Due to inflation, they also aren't really worth anything to try ...
4
votes
2answers
439 views

What are some good purist rotacaster / omni wheel designs?

In robotics, rotacasters or omni wheels are often very useful. It's possible to buy LEGO-compatible ones from some third parties, here's one random example: Unfortunately, LEGO has yet to make any ...
5
votes
1answer
297 views

Building technique for plate at near 45 degree angle

Trying to construct an octagon shaped hallway and trying to attach plates at a near 45 degree angle, but have no idea how to do this. Are there any techniques for attaching plates at a near 45 degree ...
8
votes
1answer
260 views

LEGO color discrepancies and tint variations

While building my copy of set 21310 - Old Fishing Store, I noticed that there are several shades of Sand Green amongst the many tiles of this set. The picture below shows just the 1x4 tiles included ...
6
votes
1answer
218 views

How to place minifigure legs into normal LDD bricks, like a 1x2 brick?

Let me clear up the confusion surrounding this question to the best of my abilities I'm currently in the final steps of finishing of a mech project I started some time back, finishing now at the ...
11
votes
2answers
470 views

Identifying Parts Used For The Escape Hatch of Sariel's Tiger XL Model

I am working on a similar model of Sariel's Tiger XL in prep for my own designs of a few other German WW2 tanks, and need some help identifying a part or two. Does anyone know what are the two parts ...
5
votes
1answer
554 views

Pattern for oscillation with LEGO Technic

I would like to simulate an oscillation movement of 120/100 degrees around a fixed point. Something like this one: Basically, I want to rotate a gear around its axis, but only have a partial ...
7
votes
1answer
136 views

Stuck on 42066 Air Race Jet model B

I've successfully built model A of the Air Race Jet but with model B I've got stuck on page 7, instruction 8. How do you do that?
11
votes
1answer
306 views

Why do some LEGO City vehicles have tiles in their chassis?

While building 60150 Pizza Van, I noticed that the first few steps of building the eponymous vehicle have you place lime green 1x2 tiles in specific positions and black 1x2 plates in others: These ...
7
votes
1answer
167 views

How can I firmly attach a Technic triangle to a turntable?

I found a couple good technic triangle designs over on brickengineer.com. For example: How can I firmly attach a triangle to a large turntable? Details: Really I only need to attach ...
2
votes
1answer
349 views

Extra pieces in 76112 Batmobile

I've been building the new app-controlled Batmobile. As far as I can tell, step 34 shows many more elements in the parts list than are actually used in the build. What is going on here?
2
votes
1answer
83 views

How do I connect part 62113 together to form a ladder?

I am looking to build a ladder. I saw part 62113 and was wondering if its possible to connect part 62113? Here's what that part looks like:
2
votes
2answers
173 views

How do you support upper floors in tall buildings?

When I build a skyscraper out of LEGO and the floor above is weak do I remove the flooring from above and a pillar underneath and then put the floor back or something?
6
votes
3answers
251 views

How can you pin the Penguin Suit Guy down?

I like penguins and so I was really amazed to find the Penguin Suit Guy in Collectible Minifigures Series 16: But despite coming with the 88646 tile he won't stick to it because of the skates: There'...
3
votes
1answer
244 views

How to visually search for specific parts in a 3D model?

For a missed/loose piece that needs to be reattached, I plan to check all the steps where the piece was used. If I can also get an overview of the possible piece locations from the existing 3D models, ...
5
votes
1answer
547 views

Fan door does not close completely - Air Race Jet

After completing the Air Race Jet, I found that the upper fan door does not close completely (stopping short by about 1/2 inches) when I switch from VTOL to Flight mode. The attachment points to the ...
1
vote
1answer
146 views

Problem assembling wings as shown for LEGO Air Race Jet (Technic 42066)

On Page 158 (Step #231) of the assembly instructions for the Air Race Jet, two red rivet bricks are shown being inserted into a wing. But the pieces in question will simply fall through the holes in ...
12
votes
2answers
549 views

How to glue a LEGO tree decoration in a way that's not permanent, to prevent accidental disassembling?

I have a sweet LEGO Santa Claus and few other builds that would look cool as decorations on Christmas Tree. Sadly, it would probably break if I would try to hang it. It can stand all right but is not ...
4
votes
1answer
180 views

How to ship a LEGO sculpture to a contest?

I am planning to participate in an art contest that allows paintings, sculptures, or video clips. I have a LEGO sculpture in mind that would fit the idea of the contest, but it would have to be ...

1
2 3 4 5