The magic of buying two 42082's (and then some more parts, oh dear)

[Bjorn]

I am an infrequent LEGO builder and I usually stick to official models even though I might sometimes brave to buy instructions for a B-model.

I have rebuilt my 42082 a number of times, great! But lately my mind wondered, what if I bought a second copy?

Well, things are getting out of hand. The carrier currently sits at 5400 parts in Stud.io, oops!

I am able to share at the moment a couple of pictures showing the carrier and its engine details.

Edited September 5, 2025 by Bjorn

[2GodBDGlory]

Nice, looks like an ambitious project!

[Aleh]

Am i right - here we can see 2 * 42082 + other spare parts?

[Timewhatistime]

Does the yellow gear (located right beneath the white 24t clutch gear) really belong to 42082?

Same for the grey (!!!) 20t double bevel gear...

What is the carrier supposed to carry? Are there enough (and the right) parts for a proper upper structure?

[Bjorn]

8 hours ago, Aleh said:

Am i right - here we can see 2 * 42082 + other spare parts?

I want to say it both is, and isn't. It started out as two 42082's, so you've got the axles, outriggers, turntables and chassis carried over.

But then I wanted to add to the functions. There's a 5-speed transmission that I had to make room for, as well as tighter steering on the first axle. I added a few Technic frames to make that happen. And there's a gearbox that is operated by pneumatic shifters because I really wanted to, and it works best in the space. There's also a few PF receivers and two M motors because I have them lying around.... 

So I am afraid its evolving into a MOC that has the parts of 2 42082's.

[1gor]

That is indeed interesting (and very huge in terms of size and piece count) project. Years ago I decided to cancel project of 1:15 scale crane with tires from 8110 and 42030 set because then there were no reduction hubs to tame XL motors for propulsion (I wanted full RC with 8 functions).

Looking forward to see how your project developes. So far it looks really god.

Good luch

[Bjorn]

38 minutes ago, 1gor said:

That is indeed interesting (and very huge in terms of size and piece count) project. Years ago I decided to cancel project of 1:15 scale crane with tires from 8110 and 42030 set because then there were no reduction hubs to tame XL motors for propulsion (I wanted full RC with 8 functions).

Looking forward to see how your project developes. So far it looks really god.

Good luch

Yeah, I can see many problems coming my way. The scale currently works out at 1:12,5 - which was based on the width of 42082. It's also quite mad.

In terms of upper structure, I think the best first step is to add a 2-stage boom like 42082 has, or maybe a 3-stage boom if I have the parts for that.

[Jundis]

Very cool project!

As others said, this is highly ambitious, especially the structural stiffness. The connection between the steered and non-steered axle already looks kind of too weak... I'd suggest to maybe use some of the liftarm-racks like 5x7 or the new 3x19.

[1gor]

1 hour ago, Bjorn said:

Yeah, I can see many problems coming my way. The scale currently works out at 1:12,5 - which was based on the width of 42082. It's also quite mad.

In terms of upper structure, I think the best first step is to add a 2-stage boom like 42082 has, or maybe a 3-stage boom if I have the parts for that.

IMHO 2 IR receivers and 2 battery boxes, understructure with drive, steering and two functiobs for outriggers; upperstructure with second battery box with structure rotating, boom raising, boom extending and last for cable control.

[Timewhatistime]

A lot of "magic" (not included in 2 sets of 42082) will be necessary to stabilize this colossus moaning under its own weight.

[Bjorn]

9 hours ago, Timewhatistime said:

A lot of "magic" (not included in 2 sets of 42082) will be necessary to stabilize this colossus moaning under its own weight.

Getting the structure right has been the first challenge. Luckily I was able to borrow from the 42082, which is pretty large itself.

The strongest structure is needed to connect axles 2, 3 and 4. There will bear the weight from the upper structure. This is extra hard because the gearboxes are here as well.

As others have suggested, I added a few Technic 5x7 frames between axles 2 and 3 (to the left of the image). Short liftarms were replaced by longer ones. I think it should be pretty good, but any ideas are welcomed.

[Aleh]

16 hours ago, Bjorn said:

I want to say it both is, and isn't. It started out as two 42082's, so you've got the axles, outriggers, turntables and chassis carried over.

But then I wanted to add to the functions. There's a 5-speed transmission that I had to make room for, as well as tighter steering on the first axle. I added a few Technic frames to make that happen. And there's a gearbox that is operated by pneumatic shifters because I really wanted to, and it works best in the space. There's also a few PF receivers and two M motors because I have them lying around.... 

So I am afraid its evolving into a MOC that has the parts of 2 42082's.

How about these panels? :)
https://rebrickable.com/parts/71682/technic-panel-fairing-2-x-3-x-1

[Bjorn]

10 hours ago, Aleh said:

How about these panels? :)
https://rebrickable.com/parts/71682/technic-panel-fairing-2-x-3-x-1

Completely redundant, but they do look good! I've removed them from the model and re-routed the air inlet. That makes the engine more interesting to look at (in my opinion) and I can alway add the fairings later.

I've also looked at the bumper, but the 42082 bumper doesn't look good to me on the square cab. So I'm going to stick with the non-42082 parts there.

[Bjorn]

I've looked at the chassis between axles 2 and 3 and noticed how sensible it would be to add a liftarm on top and below the 5x7 frames that were added recently. That way the chassis is much stronger (because it's higher) and it connects directly to the turntable with multiple pins.

The next challenge is to strengthen the chassis between ales 3 and 4 in the same way. That is going to be very hard because of the gearbox and pneumatics that is currently in there.

[Timewhatistime]

In my 42082 set there weren't any Pneumatics, so I will have to write a complaint to Billund and ask them for the missing parts.

[Bjorn]

8 hours ago, Timewhatistime said:

In my 42082 set there weren't any Pneumatics, so I will have to write a complaint to Billund and ask them for the missing parts.

It's unbelievable how often the good people at LEGO forgot to pack the pneumatic parts!

[Bjorn]

I was rightfully reminded about the weight of the beast and how to make sure it all stays in one piece.

I am making headway in strengtening the chassis with 5x7 frames with 15L beams on top and below. This makes for a very stiff chassis section which ties directly to the 3x19 frame for the turntable and to the axles.

To do: redesign the gearbox to the left of this image. It's quite messy at the moment because it didn't take the 5x7 into account. Also sort out the placement of the pneumatic actuators.