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16 votes

How accurate is the model 42179 Planet Earth and Moon in Orbit?

The real Solar System is of course immensely complicated, so capturing all the details in a model would result in an impractical model in terms of size, complexity, and cost. The actual model's ...
zovits's user avatar
  • 16.5k
14 votes

Why doesn't this Technic bar fit?

It will fit, see photo. But you have to keep in mind that the distance between the two horizontal beams is not 4 units but will be sqrt(6^2 - 4 ^2) (Pythagoras), or ~4.47 units (the length is the ...
Joost's user avatar
  • 8,043
10 votes
Accepted

Pieces Differ in Color/Shape from Diagrams and are Missing Lego Writing

According to Bricklink, the 42125 should contain 4 pieces of Technic, Axle and Pin Connector Perpendicular Double Split, which looks like the one the instructions show: However, it has a mold variant*...
zovits's user avatar
  • 16.5k
10 votes

If I put the bushing wavy side the wrong way will it affect my build? (Technic Ferrari car)

Assuming you're talking about Technic Bush : The wavy side is such that it can interface with studs. For example using a Technic, Plate 2 x 4 with 3 Holes : As long as the bushing isn't sitting ...
Sander De Dycker's user avatar
9 votes
Accepted

What is this yellow bulldozer set?

That looks like set # 856: Bulldozer The same set was released in the US with set# 951
Syberion's user avatar
  • 12.6k
8 votes

If I put the bushing wavy side the wrong way will it affect my build? (Technic Ferrari car)

I assume your set is Ferrari Daytona SP3 (42143). The step 81 you refer to looks like this: In this particular case and most of the time it doesn't really matter which side you place Technic Bush ...
Alex's user avatar
  • 23.2k
7 votes

Cat D11 bulldozer - should the plough and the frame be connected?

Step 925 indicates there are four attachment points for the plow. I'd suggest checking your model against this, making sure each point lines up.
Matthew Jensen's user avatar
5 votes
Accepted

Can anyone identify this red LEGO Technic car set from the late 80's/early 90's?

Searching for sets containing both 1x6 technic bricks and 6x10 plates in red quickly yields set 8865. Note that this set came with instructions for two different builds; you seem to have the remnants ...
IvanSanchez's user avatar
  • 8,808
5 votes
Accepted

How to find this LEGO part name? For connection of Technic bricks and steering liftarms

This is part# 32069 or 64920: Technic, Steering Arm with Pins. Found by looking at the (relatively short) list of parts in Bricklink's inventory under the Technic, Steering category.
zovits's user avatar
  • 16.5k
5 votes
Accepted

Does LEGO make a electronically controlled pneumatic valve bank?

I don't know of any electronically controlled LEGO pneumatics. However it's not too hard to get the needed functionality. I see two main parts to the equation : Controlling the pressure in the system ...
Sander De Dycker's user avatar
5 votes

Existence of a Technic 1M Half Beam

A little late, but a round tile with hole exists now. https://www.bricklink.com/v2/catalog/catalogitem.page?P=15535#T=C
Seth's user avatar
  • 203
4 votes
Accepted

What is this part? Grey, 3 studs long, with two pins and an axle hole

That's part 4261, Technic steering arm. It's a relatively old part (last produced in 2005 AFAICS), and it was used as part of the wheel steering mechanism in Technic vehicles. The idea is to use two ...
IvanSanchez's user avatar
  • 8,808
4 votes

How much tension can I expect to get out of a LEGO chains before it starts to give way?

TL;DR (or Executive Summary, if you like): Between 620 and 1420 grams of mass (6.2 - 14.2 Newtons of force), depending on the pieces and their age. Long version So I decided to give this a shot and ...
zovits's user avatar
  • 16.5k
4 votes

Size of packaging of Battery Box 88015

The packaging's dimensions are just slightly bigger than the battery box in it (it fits with little headroom, and room for a booklet). Specifically, 8 x 7.5 x 4.5 cm (ref. 88015-1 (Original Box Entry))...
Sander De Dycker's user avatar
4 votes

How to create a "return to steering system" without using LEGO Power Functions for Technic Cars?

I won't be able to provide a complete solution for your motorization. In the past, when Power Functions system was introduced servo motor wasn't available at first and later was rather expensive. I've ...
Alex's user avatar
  • 23.2k
4 votes

How to compare 2 custom lists of lego details?

First you need to create a Custom list on Rebrickable with contents of LXF file you got from Stud.io. Then you go to Compare sets where you have an option to compare a MOC vs your Custom List. You can ...
Alex's user avatar
  • 23.2k
3 votes

Can I connect technic hub 88012 to remote 88010 directly?

You can connect them directly using Pybricks (a 3rd-party firmware for the Technic hub). There are some tutorials at: https://pybricks.com/projects/tutorials/wireless/remote-control Using official ...
David Lechner's user avatar
3 votes

Does LEGO make a electronically controlled pneumatic valve bank?

There were a few sets with pneumatics and compressors available from the early '90's, my sister had the 8868 Air Tech Claw Rig which came with a 9V motor to keep the compressor working to provide the ...
Zhaph - Ben Duguid's user avatar
3 votes

Alternative to LEGO Education for Technic parts?

I'm not sure what your use-case is here, but LEGO Education is probably the most expensive way to simply buy parts. When you purchase from LEGO Education, you are also paying for access to a bundled ...
jncraton's user avatar
  • 40.6k
2 votes

How to make a regular pentagon from technic bricks

Recently came across this problem again, so I'd like to post another answer (2 answers actually). I figured out how to create an "exact" pentagram (no approximations) using only swivel ...
Michael Verschaeve's user avatar
2 votes

Lego 42082 Rough Terrain Crane superstructure does not rotate easily when master selector is set to neutral

I have not built this set myself, however I went through instructions to understand your issue. Based on your description it seems to me that gear train used to rotate the top section is currently ...
Alex's user avatar
  • 23.2k
2 votes
Accepted

Getting started creating LEGO kinetic sculptures

If you are interested in kinetic sculptures, as you have already figured out, you would need Technic elements, mostly. While it is possible to use non-Technic elements to build moving contraptions, ...
Alex's user avatar
  • 23.2k
2 votes

How to create a "return to steering system" without using LEGO Power Functions for Technic Cars?

You can use any rubber band to create a return-to-center mechanism, but the details are dependent on the size of your model, the available space inside for this mechanism and the force required to ...
zovits's user avatar
  • 16.5k
2 votes

Extra liftarm piece included in Airbus Helicopter 42145 set

It is pretty much impossible to tell firmly if you built your model correctly without having an option to observe it in person. Based on Bricklink's inventory for 42145 set liftarm/beam isn't the only ...
Alex's user avatar
  • 23.2k
1 vote

Bugatti Chiron built and everything worked - now pistons don’t move. What could cause this?

Based on the comments (the rotation of the wheels is confirmedly transferred via the DNR selector and the transmission), it seems likely (and is basically the only possibility left) that the ...
zovits's user avatar
  • 16.5k
1 vote
Accepted

Any other Technic parts with a pinhole slot like part 18940?

After scanning the relevant Technic part subcategories (plain Technic, Connector, Gear, Disk, Figure Accessory, Liftarm, Panel, Plate, Steering) on Bricklink, I'd say there is at most one such part ...
zovits's user avatar
  • 16.5k
1 vote

Calibration Freeze on D11

I haven't got enough reputation to add a comment. I had the same issue running the Control+ app from my Android phone. Installed the app in an iPad, worked first time. I have also been victim to other ...
Pete Mahon's user avatar
1 vote

Alternative to LEGO Education for Technic parts?

Actually, even LEGO PAB (Pick A Brick) can be a good choice- https://www.lego.com/en-us/pick-and-build/pick-a-brick?query=gear&system=TECHNIC&page=2 The link is a simple search I did for ...
Chris Harrison's user avatar
1 vote

Is it possible to re-flash the LEGO Spike Prime Hub with Mindstorms Robot Inventor Hub Firmware while retaining all functionality? And if so, how?

If you have the SPIKE v3 firmware, in order to flash with Mindstorms RI firmware you need to downgrade SPIKE v3 to SPIKE v2 (Legacy) via this link: https://spikelegacy.legoeducation.com/hubdowngrade/#...
stantyan's user avatar

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