20
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 ...
- 17.1k
20
votes
Accepted
What is the rationale behind 32333 "Technic Pin Connector Block 1 x 5 x 3"?
This part was designed for use with the Technic Engine Cylinder 2850a (or 2850b). Like this standard V8 engine:
source
The strange geometry is due to the piston shafts needing to align with the ...
- 2,996
15
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 ...
- 8,083
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*...
- 17.1k
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 ...
- 2,900
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
- 12.7k
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 ...
- 23.2k
6
votes
Accepted
Create a gimbal like structure with Technic gears
Check out the instructions (around steps 10-11) of 8855 Prop Plane. This model has a control stick that can tilt around two perpendicular axles:
- 17.1k
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 ...
- 9,356
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.
- 17.1k
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
...
- 2,900
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
- 203
5
votes
Compact rotatable connection that supports pull forces?
I would try a 3L low-friction Technic pin, whose middle section is threaded through the pin holes of two half-width liftarms (these would be joined to the trailers), and the ends capped with 1L "...
- 17.1k
5
votes
Compact rotatable connection that supports pull forces?
An option for a longer axle that allows the axle to rotate but prevents lateral movement would be to use a Technic, Axle 10L Threaded with Technic, Axle Nuts as stoppers. Single axle nuts should work ...
- 151
5
votes
How can I remove these pins?
There are a few proven ways to do that:
Push them out from the inside with a suitable instrument (Technic axle, knitting needle, chopstick, screwdriver, etc)
Grab them from the outside with a pair of ...
- 17.1k
4
votes
Compact rotatable connection that supports pull forces?
I have done something similar myself a few years ago.
I used part
, axle with stop at one end. And ran that through a regular Technic brick with holes on each end of the connection. Then secured the ...
- 1,324
4
votes
Accepted
Trouble building a LEGO gearbox
Have you seen this model?
I found this here by searching for "Lego gearbox" on Google.
Admittedly, it could be much more compact, but it doesn't use any specialized pieces or illegal ...
- 17.1k
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 ...
- 23.2k
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 ...
- 17.1k
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))...
- 2,900
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 ...
- 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 ...
- 9,758
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 ...
- 19.6k
3
votes
Accepted
How does the on/off switch prevent sound from playing on the Retro Radio?
This is accomplished by making use of a few key elements commonly used in transmissions within Technic vehicles. Here's an overview of the internal mechanics from the instructions:
The dial on the ...
- 41.5k
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 ...
- 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, ...
- 23.2k
2
votes
Accepted
How can the 42180 Mars Exploration Rover be motorized?
After receiving the rover via the 2024 Q1 Activity Support program, I set about to answer the question. Using parts from a 42065: RC Tracked Racer and a PF servo motor to keep the costs and complexity ...
- 17.1k
2
votes
How accurate is the model 42179 Planet Earth and Moon in Orbit?
I was working through this math myself. With the Lego sized earth (39mm), I'm coming up with a scale sun being 4.2m large, but 457m away. I'm using 150,000,000m as earth to sun distance. Am I ...
- 21
2
votes
Accepted
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 ...
- 17.1k
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 ...
- 23.2k
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