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

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8
votes
3answers
606 views

Which Duplo bricks have practical uses in System building?

Traditional 2x4 and 2x2 Duplo bricks can be used to bulk out models and provide a structural support for landscapes, but have there been any other uses for Duplo bricks of all shapes and sizes in ...
7
votes
2answers
440 views

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

Is there a way to connect the two beams in this angle and still keep the connection strong and keep the rotation the same?
7
votes
2answers
1k views

Is there a good way to build a dome on the top of a building?

How can I build a dome on top of a building, similar to a state capital or something similar? The building has a base of 16x24 studs.
7
votes
3answers
585 views

What techniques can be used for laying plates at 45° angle?

I've seen a number of techniques for laying individual elements at 45° angles, but I need a consistent method for laying down larger plates at 45 degrees while maintaining close contact with the base ...
7
votes
3answers
842 views

Can you build accurate models using 100% LEGO elements by following Megablocks instructions?

I shudder when I find errant MegaBloks in my LEGO elements, but admit to admiring certain in-the-box models offered by them. I know the pictures depicted on the MB boxes are not actually photos of a ...
6
votes
4answers
760 views

What LEGO wheels would look like the three types used on the JPL Mars Rovers?

I would like to build the three types of JPL Mars rovers (Sojourner, MER and MSL) with the right size ratio relative to each other. For that, finding the right wheels would be the hardest thing. I ...
6
votes
2answers
4k views

Alternative builds with Star Wars LEGO sets

I currently own these LEGO Star Wars sets: LEGO Star Wars X-Wing Starfighter 9493 LEGO Star Wars Millennium Falcon 7965 LEGO Star Wars Tie Fighter 9492 LEGO Star Wars Emperor Palpatine's Shuttle ...
6
votes
2answers
471 views

Firmly connect bricks in a triangle

I need to connect two bricks onto a plate such that the plate is facing up, and the two bricks are facing out from above it at an angle (say 30 degrees) but are connected firmly, at opposite ends with ...
6
votes
1answer
289 views

Alternative for Technic, Gear Rack 1 x 7 with Axle and Pin Holes?

We are trying to build a MOC which requires Technic, Gear Rack 1 x 7 with Axle and Pin Holes and we don't have that. Could we build it? Or are there any alternatives? FYI we do have Technic Gear ...
6
votes
2answers
520 views

How can I make a Lego heroica scale gladiator arena?

Sorry all my questions are about heroica, but this needs to be easy so that I can build in a few mins. I will make gladiator micro figures as well, if someone can make a Lion too!
6
votes
1answer
113 views

Preparations for outside display

I am thinking of using LEGO to make some outside yard art, (large minifig scale castle) and wondered what I should do to prepare them for being outside in variable weather conditions (in the Seattle ...
6
votes
1answer
312 views

Is there a documented process in 'Jamming' an NXT Ultrasonic sensor?

Just trying to gather a bit of information for a competition between a few other NXT builds, I was wondering if there was a way to make the ultrasonic sensor completely useless for the competition as ...
6
votes
2answers
385 views

How is this brick attached to the pregnant minifig?

While Google-image-searching pregnant minifigs (don't ask) I came across this fig, and other variations on it, but I can't figure out how the 2x2 round brick is attached.
5
votes
2answers
179 views

City scale connection for five-bladed helicopter rotors

I want to build a Super-Puma helicopter in city minifigure scale and form, I have the basic design planned, but I am not familiar with any five-sided technic connectors, which I will need for the ...
5
votes
1answer
1k views

How can I build a Lego rubik's cube?

How can I build a LEGO Rubik's cube, I have 2 of them, and I've built them several times, but how can I build a LEGO Rubik's cube.
5
votes
2answers
208 views

What is the purpose of the Technic Axle 6 in set 6847?

In set 6847 (Space Dozer, http://www.peeron.com/inv/sets/6847-1) there is a black Technic Axle 6 that has no structural or cosmetic function in the set. I don't have the original instructions or box, ...
5
votes
3answers
244 views

What is the official term used for building MOC models?

I know that MOC means "my own creation" as noted here. What I would like to know is do you call the actual act of creating a MOC, "MOC building", or is there another official term? I wanted to build ...
5
votes
2answers
333 views

Any way to create a gear+chain, like for a bike?

I would like to create a LEGO bike. I can imagine how most of it would work, but i'm stuck at the chain. I need a way for the turning pedals (at one spot) to cause the wheel (in the back) to spin ...
5
votes
1answer
234 views

How can the “Bar Holder with Clip” part be used?

I'm wondering whether the "bar holder" end of this element (http://www.bricklink.com/catalogItem.asp?P=11090) can be used as a stud. In other words, would it have enough clutch power to hold e.g. a ...
5
votes
1answer
330 views

How should I model a Heroica Banquet hall?

My son had a great idea for his Heroica game: Convert one of the desks from the Fortraan set into a table with food, and then your Hero could stop there and eat to regain health. I pointed out that ...
5
votes
1answer
154 views

Is it possible to create your own wheel?

After my other question, i pretty much have a bicycle design all planned. My problem now is with wheels. None of my LEGO wheels are big enough to work on a bike. And, the biggest ones are all pretty ...
5
votes
1answer
270 views

Access hatch in a wall?

Working on a 10 stud by 10 stud Square bell tower for my annual project. Need to create a access panel/door. Any tricks that can be done so it's hidden or at least not easily noticed? I need to hide ...
5
votes
1answer
183 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 ...
5
votes
1answer
982 views

What different bricks exist with studs on the sides? [closed]

(Partially inspired by this question.) I have been wondering recently just how many different LEGO bricks there are with studs on the side. Which LEGO bricks have studs specifically on the sides? ...
5
votes
2answers
343 views

Does anyone make a self-driving car?

Mapping and localization are the hottest trends in robotics today. And what's more exciting is they can be both implemented with a low-cost robotics kit like LEGO Mindstorms! I tried to make a ...
5
votes
1answer
705 views

Best sensor for balancing inverted pendulum

I want to build a balancer for an inverted pendulum. Which of the following sensors is best suited for detecting the tilt? Accelerometer Gyroscope Angle sensor
5
votes
1answer
372 views

How should I connect two LEGO cylinders with pistons to measure the movement caused by sea waves?

As part of a school project I need to make a model of a snake electricity generator. I would like to build this with LEGO elements, and for that, I need to measure the movements of the cylinders ...
5
votes
1answer
280 views

Building a 45 degree brace

I'm trying to reproduce my own house in Lego, and attached is a photo of the porch above my front door that is supported by a 45 degree wooden brace: At my current scale, the vertical white wood ...
4
votes
6answers
16k views

lego ideas (with traditional bricks)

I would like to find a large catalog of Lego designs/ideas that can be built with "traditional" lego bricks (both normal and duplo). I have found many nice designs in the web, but most of them ...
4
votes
2answers
362 views

Help identifying Lego Set from bags!

I visited Toyrus in Paris recently and bought several lego sets for my son. Mostly, Star Wars sets. In each case, we brought the manuals and the cardboard boxes so that he could assemble them. ...
4
votes
1answer
380 views

How to build a car that stops at a certain distance?

I want to build a small car that is about 200 grams. I want it to run the following course and stop at exactly or about the the finish line. I can't use any controlling devices or electronics. I've ...
4
votes
3answers
606 views

Which type of LEGO bricks would be compatible with the Mega Bloks Blind Bag Figures?

My husband collects the Marvel figures which come in the Mega Bloks blind bags. His birthday is coming up and I'd like to build him a display for his Marvel figures. I'd strongly prefer to use LEGO in ...
4
votes
1answer
405 views

How can I make a LEGO heroica scale fountain of youth using bricks from Fortaan or Waldurk?

I have started collecting heroica and I thought "wouldn't a fountain of youth be superb!" but I only have Fortaan and Waldurk... any ideas?
4
votes
1answer
142 views

Are there any theoretical works about possiblity of self-replication of LEGO systems?

Are there any theoretical works about possiblity of self-replication of LEGO systems? (constraints on the size etc., computer simulations) Here are some relevent links: Bartlab.org: PDF Document ...
4
votes
1answer
170 views

Need help fudging a group in 8039

So, I'm building "8039 Venator-class Republic Attack Cruiser ™ Star Wars TM" and I've hit a snag. I need help fudging the instruction from page 76 of book 1 for that set (see picture below). I'm ...
4
votes
1answer
715 views

Has Lego Box 5508 been discontinued?

The Lego Deluxe Box 5508 seems to be out of stock everywhere in the UK. I was hoping to get this set for my kids for Christmas, but it is nowhere to be found. Has it been discontinued? Or do they ...
4
votes
2answers
212 views

Lego MOC joining query

I have a building query. As you see the picture (attached). I really don't know how the creator can attach the "3829c01" steering wheel to the "4070". I try so many rod like parts can't get through ...
4
votes
2answers
350 views

Technique for multifacteted roof without 3049

I'm working on a project with a fairly complex roof in Dark Bley. In many areas, it seems to be necessary to use part 3049: Unfortunately, this part doesn't appear to have ever been released in ...
3
votes
3answers
598 views

Representing pregnancy on LEGO minifigs without a dome

So far for pregnancy I have tried a fetal carrier that I put on the minifig's back but this limits her movements. Specifically she can't bend too far in either direction and also she can't lay down ...
3
votes
2answers
407 views

How many ways can six 8-peg lego blocks of six different colors be combined?

I have seen the number quoted as > 650 billion. The quote is from a Danish mathematician, Soren Ehlers. Intuitively, this does not seem correct to me. Any mathematicians/statisticians out there who ...
3
votes
1answer
132 views

How to fix The LEGO Star Wars Corellian Defender set

I was playing with my Corellian Defender which took me up to 4 days to build. It broke unfortunately and I am very sad since I love it very much. I need some tips to rebuild it back :(
3
votes
3answers
229 views

Is there a way to set a flat plane at an angle to horizontal of less than 22.5 degrees, but more than 0?

I am building an airplane with a wing dihedral (the wings angle upwards from the fuselage), but I am using parts 44302 and 44301 interlocked as designed: Unfortunately, one click up is about 22.5 ...
3
votes
2answers
110 views

Lego Motor for cycling a tool

I am curios to know if I can utilise the Lego Power range to rotate a transducer to a set point and return to its original position and if so is it able to cycle the movements repetitively? Ideally I ...
3
votes
1answer
508 views

How can I make a precise one-way clutch using Technic elements?

I need a mechanism so that if a (NXT) motor rotates forward, it moves one gear, but the other stays still, but if it rotates backward, the first gear does not move, but the second one does. I found ...
3
votes
1answer
176 views

Part assortments for creative building

I've been shifting away from collecting sets to doing more MOC building. I also recently moved and I'd like to reduce the overall size of my LEGO collection. I'm trying to decide which parts I'd like ...
3
votes
1answer
723 views

how to build a diorama [closed]

I have almost all the items from the Lego Castle Fantasy set, and I would like to build a nice full Lego diorama, but I have no clue on where to start. Do you know if there is a tutorial on how to ...
3
votes
1answer
161 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 ...
3
votes
2answers
98 views

Gearing down a PF XL

I'm looking for the best way to gear down a Power Function XL. I need to achieve a very slow output RPM (less than 1-2 RPM). I've tried a 625:1 gear (trough 40:8 gear). Can someone link to a well ...
3
votes
2answers
355 views

Extra pieces in my set - Eiffel Tower

I recently purchased a Eiffel Tower Architecture kit and I found it having 9 extra pieces. I know it is normal to have extras but I think the amount is a bit high. Any ideas or explanations? Does ...
3
votes
1answer
383 views

Strongest Lego beam

In the Lego house episode of James May's Toy Stories, the engineers built the beams with studs facing upwards: around 9.5 mins into http://youtube.com/watch?v=mEFPhXl3QQY How much stronger would it ...