[MOC] Mini-42043 Mercedes Arocs in 1:45

[Ts__]

Hello everyone...

My fleet of small 1:45 trucks has grown...

I see my vehicles more as Technic and scale models, but I also use them for playing and decorating my model railroad layout.

 

Today I would like to show you my version of the large Lego Technic set 42043 Mercedes Arocs. I shrunk the large Arocs and added motors for steering, driving, and tipping in the RC version. The small one therefore has more motors than the large Lego Technic model ;-)

The two steering axles have different steering angles, so that even cornering is no problem.

 

The tipping body can be used to transport loads; the flap at the rear of the body is movable and opens when tipping.

 

The crane must be moved by hand, but it is more decorative and cannot be used for digging. However, it can be used to create beautiful construction site scenes.

 

 

In the RC version, I installed a Circuit Cube Hub and three Circuit Cube motors. I control the truck again with a Lego remote control and an M5 Atom microcontroller for the control commands between the remote control and the Circuit Cube Hub, but you can also use the Tenka Circuit Cube app on a smartphone.

Mini-42043 RC Version:

672 Lego parts + 1 Circuit Cube Hub + 3 Circuit Cube Motoren

If you like the little one, there are instructions on ReBrickable.

And I built myself a second small Arorc: this time without motors and without third-party parts, but with the same functions as the RC version as a Hand-of-God control:

There is also space for a minifigure as the driver:

 

 

 

Mini-42043 HoG Version:

677 Lego parts

If you like the HoG Version, there also are instructions on ReBrickable.

I made a video for the RC version where you can see the features. Enjoy watching it.

 

I hope you like the little Arocs ;-)

Thomas

[jus1973]

Thats mighty impressive for a 7 wide build.  Congrats on the final build, and what must have been a lot of time spent trying to get it all together to work.  

[Ts__]

Thank You!

 

2 hours ago, jus1973 said:

and what must have been a lot of time spent trying to get it all together to work.

 

To be honest, the RC Arocs was built amazingly quickly: design, parts procurement, and instructions within about four weeks....

But: I've been building these little RC trucks for about two years now and have learned a lot in the process. With the Arocs, only the steering with two steering axles and the tipper body were technically new. And the steering was developed in just one evening^^. Unfortunately, it doesn't always work out that quickly, but I was on a roll....

family picture:

Thomas

[mpj]

This model is amazing! How does the steering work?

It's the super detailed brother of my simple truck:

https://rebrickable.com/mocs/MOC-140088/technicprojects/mini-tipper-truck-2x-42147-alternate-model/#details

 

Edited December 20 by mpj

[Ts__]

Thanks!

But I'm surprised that your technical implementation of a 4-axle vehicle of this size doesn't look completely different. Very good work, I hadn't noticed it before and I will of course take a look at how you implemented the steering. I'm always happy to learn something new ;-)

 

12 hours ago, mpj said:

How does the steering work?

 

I rotate a 4L axle (Magenta in the picture). This 4L axle has a lever of 2 studs to the first steering axle and a lever of 1 stud to the second steering axle. This creates the different turning angles of the wheels. Simple, but it works ;-)

 

Thomas

Edited December 21 by Ts__

[mpj]

Genial!

[gyenesvi]

Really amazing minification work! Looks easily recognizable and great that you managed to put 3 RC functions into that small volume, especially like the steering linkage!

[Ts__]

Thanks to the mods for moving this, it fits better here.

Thanks also to @mpj and @gyenesvi

 

Thomas

[mpj]

10 hours ago, Ts__ said:

Thanks!

But I'm surprised that your technical implementation of a 4-axle vehicle of this size doesn't look completely different. Very good work, I hadn't noticed it before and I will of course take a look at how you implemented the steering. I'm always happy to learn something new ;-)

In my model the steering of the first and second axle are equal. But I was limited to the parts of 2x 42147 sets.

Do you have any other 7 studs-wide truck planned in the future?

Edited December 21 by mpj

[Ts__]

1 hour ago, mpj said:

Do you have any other 7 studs-wide truck planned in the future?

I do have a few trucks (RC and HoG) here, but they are primarily tractor units for my Modalohr project (which I haven't shown on Eurobricks yet). The Arocs were just a spin-off because I was intrigued by the feasibility.

Thomas