TexasEngineer454's Land Rover Defender 42110 RC MOC

[TexasEngineer454]

Greetings All, posted this in another thread but thought I'd make my own thread here in hopes of some more technical input. 

I kept most of the body intact and used maybe half of the original drive-train. Everything else is MOC. I used parts from 42124 and 9620R to finish the RC swap.

MODS 

-1 PF L motor runs the steering

-2 PF L motors run the AWD system (1 to the front and 1 to the rear)

-1 PF M motor runs the winch

-Fully independent All Wheel Drive

-Added tow hitch to pull the trailer I built (I'm open to better designs for a hitch???)

-Lego technic 4 port HUB programmed through BrickController2 working with XBOX controller

-Swapped original tires for 94.3x37mm (purchased used from local LEGO re-sale store)

 

A few items I have left to finish 100%

-Install differentials: The Rover has a solid axle in the center fed to each tire as the differentials I have (62821a) kept popping loose when crawling over obstacles. Part of the criteria for this build was to keep the IFS/IRS and AWD system. The problem was the suspension geometry offers quite a bit of camber and articulation, but it was pulling the axles out of the differentials. I am considering swapping in the newer closed style (65414) differential. Has anyone with a similar design had this issue before? 

Currently have 12 tooth bevel gear on the motor into a 20 tooth gear on the drive axles. This seems to give the best speed to torque ratio. 

-Redesign trailer hitch: I am using the same basic design as the John Deere 9620R but the side-to-side movement isn't very good. Does anyone have an idea for a better design that offers side-to-side as well as arch movement? 

[Jundis]

15 hours ago, TexasEngineer454 said:

-Swapped original tires for 94.3x37mm (purchased used from local LEGO re-sale store)

Isn't there a problem with steering here? The tires barely seem to fit...

15 hours ago, TexasEngineer454 said:

Does anyone have an idea for a better design that offers side-to-side as well as arch movement? 

There are multiple solutions depending on the height of the hitch. As you seem to have a limited selection of parts and the trailer isn't too heavy, you can use two ellipse shaped liftarms from the John Deere model in this manner:

Edited April 27, 2023 by Jundis

[TexasEngineer454]

4 hours ago, Jundis said:

Isn't there a problem with steering here? The tires barely seem to fit...

There are multiple solutions depending on the height of the hitch. As you seem to have a limited selection of parts and the trailer isn't too heavy, you can use two ellipse shaped liftarms from the John Deere model in this manner:

Steering hasn't been an issue, but the Rover isn't very fast either. The rim offset is actually slightly better than the stock rims the 42110 set comes with and my suspension and body actually sit higher than the stock design. 

 

The issue with the trailer hitch is that my current design does not offer any side-to-side movement. What I mean by this, when the Rover approaches an incline at an angle I would like the trailer to independently roll. Much more like an actual ball hitch coupler on a real trailer. 

[Jundis]

17 hours ago, TexasEngineer454 said:

The issue with the trailer hitch is that my current design does not offer any side-to-side movement. What I mean by this, when the Rover approaches an incline at an angle I would like the trailer to independently roll. Much more like an actual ball hitch coupler on a real trailer.

Then use a towball (6628 or 2736) with a steering arm (31794) :-)