Questions tagged [building]

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

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How big to make a perfect cube? And how to build it

I want to make a model, that involves many cubes. I want to make many individual cubes, then connect them together. I don't want my cubes to be that big. That leads to my first question: What is the ...
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53 votes
5 answers
14k views

How do I center a 2x2 plate on a 3x3 plate?

I want to be able to center a 2x2 plate in the middle of a 3x3 plate - specifically to put minifig on. Another option would be to center a 2x1 plate on a 3x1 plate.
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  • 675
5 votes
2 answers
621 views

How can I make a spiral staircase with basic blocks at right angles?

Quite simply, how do I make a spiral like a staircase, but with only these blocks? There is also a 8x2 block, but my brother has it. Because it is quite an old set, I need a spiral staircase without ...
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  • 263
8 votes
5 answers
1k views

How can I make my robot heavier?

I'm building a 3kg LEGO EV3 sumo robot and I need to make it as small as possible. Which LEGO items do you recommend to add more weight on it? (tires, plates, wheels, blocks, minifigs etc.)
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9 votes
1 answer
448 views

Technic 8858 Rebel Wrecker alternate model impossible to build?

I don't mean "difficult", I mean it appears to have an actually impossible instruction. Or am I missing something obvious? Here's the deal (pardon my lack of standard names for parts): I recently ...
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  • 191
8 votes
2 answers
840 views

Brick-built sails for a pirate ship

I am building a Sea-Cow(70810)-like ship that of course needs sails. The sails should be larger than the Technic fairings used in the LEGO movie set, but I want to avoid cloth sails and strings. My ...
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  • 2,513
14 votes
1 answer
1k views

Why don't inverted brackets (99780) work in this SNOT 180 configuration?

I've been working on a MOC and tried using the following configuration of inverted brackets to achieve studs out SNOT 180 in a tight space: As you can see from the photo, this doesn't quite work. I ...
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2 votes
1 answer
218 views

Advice on where to start

I've seen this (http://petapixel.com/2013/04/12/check-out-this-lego-slr-and-its-lego-camera-strap-and-lego-strobe/) and really want to build it but cannot find instructions anywhere. I can see the ...
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5 votes
2 answers
22k views

I'm looking for a good LEGO Modeling Program

I've seen people use those programs that model out your own LEGO design so you and others can see how it would look. Can I get a list of a few? Free and safe are preferable. Thanks!
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2 votes
3 answers
178 views

Need help identifying a couple of Lego sets, grey tank with 4 short legs, and ship with long wings with lime green tiles

Do you recognize either of the below Lego sets? We received them as a hand-me-down gift with no instructions. Thanks for any help!
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4 votes
1 answer
2k views

How to connect chain links in LDD to make tank tracks

I need help trying to connect chain links (in LDD) around a set of idlers and drive wheels. This is to be used on a tank design, and therefore is not using actual chain. It is using "Chain Link m=1" ...
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7 votes
2 answers
348 views

Good "freeware" mosaic creator

I need to know of a decent "freeware" program that can take an image and turn it into a full color mosaic. It also needs to have a part count/listing.
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1 vote
5 answers
2k views

What is the largest number of pieces in a set for LEGO, Nanoblock, or any other brand?

What is the largest number of pieces in a set for LEGO, Nanoblock, or any other brand? I recently bought a 6800-piece LOZ Block set (Chinese Nanoblock knockoff). I was wondering if there are sets in ...
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3 votes
2 answers
293 views

How do I robustly tilt a strength-1 wall?

Background I am still working on my model of a ride-on mower, which has a seat that looks like this: As you can see, the seat is mounted onto an inclined surface, which I realised to my satisfaction ...
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  • 2,154
5 votes
1 answer
194 views

How can I emulate this wheel from the mowing unit of a ride-on mower?

I am trying to build a model of a specific ride-on mower with Lego and I cannot find a satisfying solution for the wheels supporting the mowing unit. This is what they look like on the original: ...
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  • 2,154
6 votes
3 answers
674 views

Articulations : which technique to use on small constructions for sturdiness?

So I have been using LEGO® for a rather long time and over the years, I started going towards small constructions. While doing this, I began building rather small robots (Mobile Frames for those who ...
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2 votes
1 answer
2k views

Bag 2, 2011 set, ID 135149

Can anyone identify this bag? It has in it what looks like the grill of a truck, or skis! Blue jacket, fearful face, gray round piece. Mainly black blue and white. 2011 printed on bag.
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5 votes
1 answer
1k views

Cheapest and Simplest way to build a LEGO Technic car?

Having no LEGO Technic parts at all, I'm looking for the cheapest and simplest way to build a LEGO Technic car which can be combined with two Lego Technic motors to drive forward and backward (phase 1)...
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3 votes
1 answer
248 views

How to convert a bar into an axle or pin - Using the Axel Hub with Four Bars

I would like to utilize the Axle Hub with 4 Bars (#48723) in a way that the four bars would become axles. What is the most concise way to accomplish that? Here is a diagram of my end goal:
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8 votes
1 answer
993 views

How to speed up assembly for big LEGO technic sets (e.g. 42043 Mercedes-Benz Arocs)

Is there any ways to help speed up the assembly process when building big LEGO Technic set such as the 42043 Mercedes-Benz Arocs?
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5 votes
1 answer
254 views

Working with Curved Bricks

I'm hoping to stack curved bricks. There are two slots along the edge to allow the bricks to be set on plates. These become unsightly when the bricks are stacked atop each other. Has anyone seen any ...
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4 votes
1 answer
5k views

How best to plan and design a custom LEGO creation?

I'm curious how best to proceed with my own creations. I have several ideas that I want to take a stab at implementing but know I probably don't have the all bricks I need. I am not new to LEGO, but I ...
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6 votes
3 answers
6k views

Cutting a LEGO baseplate

I have a regular LEGO baseplate that I'd like to shave down to fit into a car travel kit. Does anyone have experiencing cutting a baseplate? I'd love tips on tools or technique!
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12 votes
2 answers
2k views

What are good books for building techniques of LEGO Technic

I've been searching for good resources for especially LEGO Technic. I find the Unofficial LEGO Technic Builder's Guide by Paweł “Sariel” Kmieć. The book is very good at explaining things. Beside that ...
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0 votes
1 answer
75 views

Purchase of large blocks in South Africa

I have thousand's of small-single, two and four blocks but sometimes need to build larger structures and thus, would like to know were in South Africa I can purchase these larger blocks without all ...
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3 votes
0 answers
168 views

Challenge: A good, swift kick

Hey everyone, this is Bricks.SE's first challenge question! Context: On other sites, you sometimes see a question made specifically for the purposes of getting a lot of good ideas, the checkmark given ...
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10 votes
4 answers
889 views

How to make a regular pentagon from technic bricks

For the purposes of this build, we need a pentagon (figure with 5 sides), that is regular (all sides have equal length), and it needs to be able to be mounted on a build (like a wreath) by a technic-...
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9 votes
1 answer
1k views

What part(s) can I use to connect modules at a 90 degree angle?

I'm looking for brainstorming! All ideas welcome. I have a design I'm working on which: is made of a bunch of identical modules fitting into a single framework has to allow the modules to "plug in" ...
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20 votes
6 answers
3k views

What are some creative uses of the orange brick separator tool?

I have these piling up around my LEGO corner: Any suggestions for creative uses? Especially multiple?
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1 vote
0 answers
88 views

Temp Glue for LEGO [duplicate]

We have a Train Station Set, but this built is so loose and comes apart so easily thus it is really hard to move/play/connect to other parts. Is there some product like temporary LEGO glue to stick ...
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2 votes
1 answer
625 views

Cheapest set containing electric motor

Which LEGO set is the cheapest I can buy in a store with an electric motor in it?
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6 votes
2 answers
13k views

What is the best way to rebuild Lego sets?

My six year old son loves to build with LEGO bricks and has quite a few LEGO sets. Over time they have been disassembled, so we decided to try to rebuild some of them. We have the original ...
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2 votes
2 answers
5k views

Age recommendations explained? [duplicate]

Can you explain the rationale behind age recommendations for various Lego products? For example, what makes a 4-7 rating different from a 6-8? Is it unreasonable to buy a set labelled 12+ for my very ...
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-1 votes
2 answers
3k views

Why do LEGO sets have a minium age rating? [closed]

Many LEGO sets have minimum age ratings, such as 7-12, 9-14, and 16+. Why is this? Are the models really that different in terms of complexity? Also, why does LEGO often indicate that sets are not ...
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18 votes
5 answers
112k views

What is the quality of LEGO replicas on Aliexpress?

Aliexpress sells a lot of LEGO replicas, has anyone here bought one? I am wanting to know how the quality compares to LEGO? Example products: https://www.aliexpress.com/wholesale?catId=0&...
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4 votes
1 answer
524 views

Overview of Engineering Principles incorporated in Technic LEGO sets

I run an after-school technology education program and want to expose kids to real-life engineering by means of having them build commercially available Technic kits which we then deconstruct and ...
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4 votes
1 answer
480 views

Any issues with this non-standard gear combination of 12t gears?

I don't see any "accepted" gear ratios for a stud-less direct-diagonal gear combination on sariel's excellent gear coupler but by shifting 12t gears such that they mesh off-center, it seems to work (...
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6 votes
1 answer
610 views

Which combination has a lower gear friction?

I need roughly a 1:3 reduction and I see a couple of ways to achieve it: using a 8t gear and a 24t gear (1:3) using 2x 12t gears and 2x 20t gears (1:2.779) using a 16t gear and a 40t gear (1:2.5) ...
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5 votes
2 answers
5k views

How important is a center differential on a 4WD model?

I am looking to make a 4WD, single-engine powered vehicle, and I have seen others such as this which use three differentials to distribute the power to all 4 wheels: http://www.eurobricks.com/forum/...
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3 votes
2 answers
2k views

How to design ackermann steering with lego wheel bearing front?

I wanted to use a steering system based on the 11949 part: But I am not sure how to use it in an ackermann system - I would like to be able to have drive and suspension on the wheel, and this piece ...
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  • 1,146
11 votes
8 answers
9k views

What will happen if I submerge LEGO in water?

I'm thinking of using real water in my LEGO City and putting the Atlantis and deep sea exploration sets at the bottom of the tub of water, but I don't know what will happen to LEGO when put in water. ...
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5 votes
1 answer
576 views

My building is developing gaps and spaces

I am building a large project, and there are spaces developing between bricks and plates. I've been working on it for almost a year, and some places are 20+ bricks high. What can cause this over time? ...
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5 votes
2 answers
606 views

Large trap door - alternative to door with frame 4595708

I need to build a large trap door, the trap door 4x5 with frame 6x8 is too small for my model. Other doors/hinges seem to have too much resistance and the door doesn't fall by itself, it must be ...
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5 votes
2 answers
2k views

Strongest LEGO structure - (2) Floor

What is the strongest LEGO box structure? I am going to build a LEGO computer case. Different from Mike Schropp and greenyouse, I am planing to build an upright case. (This is a general "strongest ...
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  • 265
8 votes
3 answers
3k views

Strongest LEGO structuce - (1) Pillars

What is the strongest LEGO structure? I am going to build a LEGO computer case. Different from Mike Schropp and greenyouse, I am planing to build an upright case. (This is a general "strongest LEGO ...
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  • 265
8 votes
2 answers
3k views

How to build a limited slip differential?

Lego provides a couple of ways for building a differential, such as this: and also provides a limited-slip gear like this: http://www.brickowl.com/catalog/lego-technic-differential-with-one-gear-28-...
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  • 1,146
3 votes
2 answers
580 views

What is the best way to create an authentic weatherboard wall?

I am working on a house where I want to create a weatherboard look for the outside walls. I'm not certain the best way to go about this. Currently I'm using the horizontal side of a 1x2 profile ...
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  • 131
4 votes
1 answer
578 views

How do you eliminate the gap between castle doors?

I'm building a MOC castle and want to use a pair of 1x5x7 and 1/2 stockade doors. My problem: I can't get the doors to fit flush. Either there's a 1/8 to 1/4 inch gap between them, or they overlap. ...
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7 votes
3 answers
7k views

Does knolling help or is it just part of the fun?

When building a new set, many people knoll their LEGO bricks before beginning the assembly. My question is: Is there a actual advantage to knolling all the pieces or is it only a way to stretch the ...
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1 vote
1 answer
237 views

Issues with set 10234 book 3 pg 43

The white wing-like piece continues to pop off when placed. Has anyone figured out a fix for this or am I doing something wrong Instructions 3 & 4: src: http://lego.brickinstructions.com/10000/...
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