Simple, motorised car car chassis (no differential or suspension and only 1 m-motor and servo)

[Yappiland]

Hi, I was thinking if we could find out and compare the easiest, but best way to create a motorizable Lego car chassis, that has working turning system, perhaps similar to the one in 42123 and is able to move, but without a differential or any additional, performance enhancing parts. This is for my new series of Custom technic cars. Thanks for the help!

[JoKo]

I'm sure we can help you with some examples. You want to build a remote controlled car, right? About the same size as the 42123 McLaren? Do you already have motor, servo, technic bluetooth hub or remote controller? 

[Yappiland]

Yep all that, but I have an idea relating to the turning system of the 42123 Mclaren, not size

[JoKo]

OK so what size have you in mind? Have you an idea about the wheels you want? 

The steering system of the McLaren is indeed simple and you can easily connect a servo on the steering axle

You can also take inspiration on the McLaren to motorize your car. You can connect the motor to the rear wheel instead of the V8 fake engine. 

Did I answer your question? I can help you with building a chassis but i need to understand what you have in mind.  

[Yappiland]

Hi, at the moment I'm looking at medium sized chassis, around 28 studs in length will be ideal, Im a new poster, so Im a bit amateur, the idea of using the Mclaren is great, I actually tried to motorize the car  and the Lego 42151 too but couldn't find a good tutorial  and couldn't do it myself, regarding parts, wheels would be the same as the Mclaren as that is the car that currently supplies my parts and all, Im starting a motorized car build but really, I don't know where to begin so I ask for help on the framework and what to pick, what motors, what design and what to add or not, at the moment a simple turn and move chassis would be fine.

Thanks a lot.

[JoKo]

33 minutes ago, Yappiland said:

Hi, at the moment I'm looking at medium sized chassis, around 28 studs in length will be ideal, Im a new poster, so Im a bit amateur, the idea of using the Mclaren is great, I actually tried to motorize the car  and the Lego 42151 too but couldn't find a good tutorial  and couldn't do it myself, regarding parts, wheels would be the same as the Mclaren as that is the car that currently supplies my parts and all, Im starting a motorized car build but really, I don't know where to begin so I ask for help on the framework and what to pick, what motors, what design and what to add or not, at the moment a simple turn and move chassis would be fine.

Thanks a lot.

Ok I'll see what I can do. But I didn't understand exactly what are the electronics you own. Can you be more specific about that?

[JoKo]

I found this:

 

 

 

It should work with your wheels too. If you don't have a differential stop the video at 3:20  and build this instead (then back to video at 3:34)

 

[Yappiland]

Thank you so much, ill have a look, as this is exactly what I needed, but I don't have the frame or gears posted in the pictures, I think I'll need to buy those.

[JoKo]

@YappilandYou're welcome!

This solution could work too. These gears will work just as well! Not sure about the frame but it's worth trying.

 

Edited December 20, 2024 by JoKo