[MOC] Mini Trophy Truck

[N1K0L4]

 

Inspired by the BuWizz MOC with the same name.

Hello,
so it all started one day when I started building the original model by the instructions in BL Studio. While I was building it I noticed that there was quite a bit of unused space in the chassis, so I said why not add a extra motor? That ended in me designing a whole new chassis and taking the body as I think it looks really good (of course I didn't copy it piece by piece).

Specifications, features and functions:

• front independent double wishbone suspension with 14° of caster, hardness adjustability with use of rubber bands and 3.5 studs of travel
• front steering by PU XL motor
• rear live axle suspension with hardness adjustability with use of rubber bands and 3 studs of travel
• rear wheel drive with a lot of possible gear ratios
• controlled by BuWizz 3.0 Pro
• robust body
• well protected electronics
• interior with 2 seats and a steering wheel
• full size spare tire

 

It's a lot of fun to drive, I personally like to drive on bumpy asphalt. It's pretty versatile too, with the right gearing it can go trough grass or go pretty fast.

I found myself using mainly 3 gear ratios:

• 12:20 for offroad driving
• 20:28 for all around driving (14.6 km/h max.)
• 1:1 for fast driving when I have space (20.7 km/h max)

 

It's pretty tough too. I rolled it and crashed it many times and almost nothing broke. There's one weak point though, and those are the front hubs. Almost every time one of the front wheels takes most of the impact, one of the towballs on the hub breaks. When it does break it's pretty easy to change, I always have a few spares inside the spare wheel just in case.
Charging and getting the BW unit in and out is pretty easy too as the roof is really easy to remove.

 

Instructions: https://rebrickable.com/mocs/MOC-212772/N1K0L4/mini-trophy-truck/

Video:

I hope you like it!
Nikola

[gyenesvi]

Really cool little beast! I like the construction for the suspension, especially the rear, and the layout of the drivetrain; it's got massive amount of power for the size. Nice that the gearing can be adjusted. The looks are simple and clean, maybe only that large hole in the front of the hood could be filled.

Why did you use XL motor for steering? In my experience it's less precise than L motor. Is it for structural consideration?

[N1K0L4]

16 hours ago, gyenesvi said:

Really cool little beast! I like the construction for the suspension, especially the rear, and the layout of the drivetrain; it's got massive amount of power for the size. Nice that the gearing can be adjusted. The looks are simple and clean

Thank you!

16 hours ago, gyenesvi said:

maybe only that large hole in the front of the hood could be filled.

It's like that because I wanted to get the COM low as with this soft suspension I predicted it would be quite easy to roll. Also wanted to be close to 750g, it has 753g.

16 hours ago, gyenesvi said:

Why did you use XL motor for steering? In my experience it's less precise than L motor. Is it for structural consideration?

Exactly that. In some cases it really saves a lot of parts and makes it sturdier. I haven't really noticed any precision problems tbh as lego itself has much more slack.

Edited March 14 by N1K0L4

[1980SomethingSpaceGuy]

That looks a lot of fun to drive! Well done!

[2GodBDGlory]

Very cool! Huge power at that scale, and a pretty interesting suspension setup as well!

[N1K0L4]

25 minutes ago, 1980SomethingSpaceGuy said:

That looks a lot of fun to drive! Well done!

Thanks! It is, and the best part is that it's easy to carry with you. For example I have just enough soace in my school bag for it and drive it after school.

14 minutes ago, 2GodBDGlory said:

Very cool! Huge power at that scale, and a pretty interesting suspension setup as well!

Thanks! It's actually not that overpowered as it's still 753g.

[Zerobricks]

Awesome little MOD. Great idea about using XL motor as a structural component, I have yet to use it for a steering motor. Any issues with torque twisting the rear axle?

[Aurorasaurus]

Really nice! I particularly like how sturdy it is, it seems to take a beating really well.

[N1K0L4]

5 hours ago, Zerobricks said:

Awesome little MOD. Great idea about using XL motor as a structural component, I have yet to use it for a steering motor. Any issues with torque twisting the rear axle?

Thanks! Surprisingly not really, you can see it a bit under heavy acceleration but that's it basically.

 

2 hours ago, Aurorasaurus said:

Really nice! I particularly like how sturdy it is, it seems to take a beating really well.

Thank you!

[Paul B Technic]

Very cool. Nicely presented too.

[N1K0L4]

2 hours ago, Paul B Technic said:

Very cool. Nicely presented too.

Thanks!