Monster Pickup 4x4 with 4 BuWizz Motors

[Another Brick in the World]

Hello guys,

I would like to present my first Moc here, which was built around November 2023. I recently returned back to Lego for about 2 years now. I have built a few Mocs, but I have not found them good enough to show to others.

After having built my trophy truck prerunner, I wanted to build another 4x4 with 4 BuWizz motors at a smaller scale. Then, my friend @N1K0L4 sent me an prototype chassis, which I later on finished. You can find a finished version of this chassis in the form of a 4WD buggy here.

The model features the following features:

• 4 Wheel drive (4 BuWizz Motors)
• Front Wheel Steering with Ackermann geometry (Power Functions Servo)
• Skid Steering
• Removable body
• All fueled in with 2 BuWizz 2.0 units

One of the biggest highlights of this model is its drive train. The horizontally placed BuWizz motors allow for a very compact chassis, with the added benefit of independent wheel drive and low center of gravity. This is what really convinced me to build @N1K0L4's chassis.

And no off-roader is complete without suspension, which this model has. It features an independent suspension design, with double shock absorbers per wheel. I would have liked to add actual pneumatic shock absorbers, but I don't have any pneumatic cylinders. Still, if any of you builds it, you can try adding them and seeing the effect.

A couple of more images:

The model performed very well off-road, having a high speed while still leaving some torque for crawling. This is actually one of my best performing models (only after the Monstermog, that is just a beast ). I think the only drawback this model has is the usage of the old type of CV joints, which can deform on high torque. I actually blew out one while testing a WIP. I guess the perfect design doesn't exist

Actually, if you want to build this model yourself, I've uploaded the 3D studio file for free on Rebrickable here.

And as usual, here's a YouTube video showcasing its off-road capability and features.

Feel free to post a comment about what your thoughts about it.

 

 

 

[Aurorasaurus]

I've seen a lot if your videos on youtube, and I'd agree this is one of your best. Keep up the good work!

[Jurss]

Is that old type cv-joint at motors holding well?

[Another Brick in the World]

19 hours ago, Aurorasaurus said:

I've seen a lot if your videos on youtube, and I'd agree this is one of your best. Keep up the good work!

Thank you for the support!

10 hours ago, Jurss said:

Is that old type cv-joint at motors holding well?

They hold up ok-ish, but I'd definitely wouldn't recommend using them without any lubricant. These can snap off very easily, and I blew out one of them which no longer stays together when I put power on it. it's one of the weak aspects of this model.

If you ever blow up one of these, I'd recommend watching this video.

Edited April 2, 2024 by Another Brick in the World

[Zerobricks]

Or you can use the new one from the Audi. Either way, good job!

[Another Brick in the World]

Just now, Zerobricks said:

Or you can use the new one from the Audi. Either way, good job!

Thank you for leaving a comment!

When I got my hands on the Audi set, I tried doing so, but the axles are designed around 5x7 frames which don't allow space for the larger diameter of the Audi joints. I'll try to redesign the axles in a future build, maybe a 6x6.

[Lego Tom]

That is rowdy!!! 

[Aurorasaurus]

4 hours ago, Another Brick in the World said:

 I'll try to redesign the axles in a future build, maybe a 6x6.

6x6 with 1BW motor per wheel and planetary hubs is guaranteed fun. Though when I built one it felt a bit slower than I'd liked. If speed is important you'll want a gearbox. Either way, I'm excited to see what you come up with next!

[Another Brick in the World]

17 hours ago, Lego Tom said:

That is rowdy!!! 

Yes, it is

16 hours ago, Aurorasaurus said:

6x6 with 1BW motor per wheel and planetary hubs is guaranteed fun. Though when I built one it felt a bit slower than I'd liked. If speed is important you'll want a gearbox. Either way, I'm excited to see what you come up with next!

Well, for me speed isn't as important as overall performance. If that means having to sacrifice speed, I'm willing to do it. Still, it doesn't make much sense to me that a 6 BuWizz motor 6x6 would be slower than a 4 BuWizz motor 4x4

And talk about gearbox, I currently have a model built with a 2 Speed gearbox and 2 BuWizz motors. I'm just waiting to be able to record it.

[Aurorasaurus]

6 hours ago, Another Brick in the World said:

Still, it doesn't make much sense to me that a 6 BuWizz motor 6x6 would be slower than a 4 BuWizz motor 4x4

And talk about gearbox, I currently have a model built with a 2 Speed gearbox and 2 BuWizz motors. I'm just waiting to be able to record it.

Perhaps my expectations for speed were a little high. It was about 6km/h I think.

Could you send a photo of the gearbox?

[Another Brick in the World]

On 4/3/2024 at 10:44 PM, Aurorasaurus said:

Perhaps my expectations for speed were a little high. It was about 6km/h I think.

Could you send a photo of the gearbox? 

Yes, I will make actually a full topic about the model with gearbox soon. I'll let you know about it when I do so :)

(Sorry for the late response)

Edited April 15, 2024 by Another Brick in the World