N1K0L4

Hello, so before I made the RWD version I had made a AWD version similar to this one. It had one major drawback, a poor steering angle. I did take it to the BuWizz Gathering and had fun with it there, but at the same time it was kinda frustrating not being able to turn properly. After that I built the RWD version which handled much better. One day @Alex Ilea shared a idea with me for getting rid of CV joints which he's using in one of his models. When I saw that I immediately got to designing the new chassis. Because of a different front axle, the wheels would be quite far from the steering pivot point which would take valuable space. Because of that I had to make my own rims which could support the tire over the gears. I ended up with this setup. This wheel ended up not being used so often as I replaced it with the 86652 rim when drifting. And this is the finished model. It retained most of the body from the RWD version but lost the interior. It also still has the opening rear hatch which is quite useful here for charging the battery. The main idea behind this model was to make a small AWD drift car for small indoor places. I consider this model a success in that regard. Specifications: 27 x 13 x 11 studs (21.6 x 10.4 x 8.9 cm) 2 PF L motors for drive 1 PU L motor for steering powered by BuWizz 3.0 Pro 1:2.77 gear ratio AWD without differentials Stud.io file: https://rebrickable.com/mocs/MOC-201401/N1K0L4/mini-42109-tg-rally-car-awd/ You can see more close ups and some drifting footage in the YT video: I hope you like it! Nikola

Clever way to do the rear suspension, do the flexaxles ever fall out?

Nice model! Do the front axles steer at different angles or are they the same?

Thanks! TBH, it really understeers on those smooth tiles which is a bit annoying. And the drifting is basically a necessity there. But on grippy surfaces it's really good.

Thank you!

Awesome model, I especially like the front hood, looks very good. I personally think the tires contribute a lot to the climbing preformance, it would be good to know if you tested it with the LEGO ones too to see the difference. In terms of electronics, I have one idea for the future. Since you're using your own motors and speed controllers, you could find a brushless setup that fits in PF L/Buggy motor/BuWizz motor housing. That would make it even more powerfull.

It is, I'm just waiting to be able to build the AWD one, that will be even more fun :) Thanks! :)

23%, from which are most some common parts + parts for the body. You can compare it and see the details on the Rebrickable page too. Thanks ;)

I'm using a GoPro Hero 4 Session and some tape. I usually use one 3D printed case with a pin hole for mounting it (I can send you the file if you want), but this time it was too complicated to integrate that.

Thanks! I get what you mean, that was my original idea, but due to its very limited space between the wheels (only 9 studs) this was the only solution. If you were to use some other PF power source you'd also need to redesign the other parts of the front because of a different servo motor used.

Thanks! Nope, on the gathering I had a AWD version, which isn't the same as one that is still to be built, but the body is the same.

Hello My first LEGO RC model was the 42109 Top Gear Rally car. Back when I got it, I was only starting out with building my own stuff, so the first MODs were..., let's just say not the best quality. But the goal was clear from the start, improve the its performance. The first "ok" MOD was 2 years ago when I first got some BuWizz components. I added independent suspension on all wheels and a BuWizz motor powering the rear wheels. It was again a bit questionable build quality, and it had A LOT of slack in the steering, but it was good overall. Few years forward and I again wanted to build something under that body. Than I got an idea of miniaturizing the whole car, making it more practical and agile. That's how I got to this model. It's really small at only 27 x 13 x 11 studs, exceeding my expectations for size. Speed is much better now, having more than twice the power and 1:3 gearing it's able to achieve up to 10 km/h. Even though it doesn't have a differential, it's surprisingly agile on grippy surfaces, but you do have to slide the back around on slippery surfaces either it understeers. Specifications and features: powered by BuWizz 3.0 Pro and 2 PF L motors geared 1:3 steered by PU L motor partly openable front hood openable rear hatch similar to Group B rally cars interior with 2 seats and a steering wheel 3 x 3 x 2 stud space under the seats for spare parts Instructions: https://rebrickable.com/mocs/MOC-197632/N1K0L4/mini-42109-tg-rally-car-rwd/ Video showcasing the model: You also might be wondering why have I put "RWD" in the titles. That's because I'm working on a AWD version, which is currently finished only as a digital model. When I find enough time I'll build it, but it should be done this year. I hope you like it! Nikola

Yeahh... Most of RC cars these days are BuWizz powered. Maybe get some. They also sell their small model with one BuWizz motor and battery, you should check it out if you're looking for something faster.

I have a lot of small scale RC models on my Rebrickable page, you can check them out here: https://rebrickable.com/users/N1K0L4/mocs/ All of them are BuWizz powered though, not sure if you have those.

Ohh..., that makes more sense. :)

No need for cutting. All ends of all axles are rounded off, which is not represented in digital programs.

Than you would loose the ability to change gear ratios inside the hub, which is a good feature to have IMO.

Thanks!

Gotta love the Safari version, such a great addition to a already amazing model!

Hello So, as you know I usually build small onroad models, but I've been thinking for quite some time now to finally make a proper 4x4 offroader. And of course, it ended up being quite small :) Specifications: 30 x 21 studs 2x BuWizz motors for drive 1x PU L motor for steering 1x BuWizz 3.0 Pro Features: Rigid chassis and body Flat underbody Openable hood 1 set of PU LEDs in the roof Independent double wishbone suspension Adjustable suspension hardness with rubber bands Independent left-right side drive (skid steering, helps while cornering) It's not geared high so it's really good at climbing. The 75.1 mm spiky tires provide plenty of mechanical grip (even on sand). With it I also competed in the Unlimited Offroad category at BuWizz Gathering 2024 and managed to get 8th place. One other cool feature is that when you get rid of planetary wheel hubs and put only the rims on, it drifts really nicely: Instructions (.io file): https://rebrickable.com/mocs/MOC-195278/N1K0L4/mini-offroader/ Video showcasing the model: https://youtu.be/Ncd2ji36wpw I hope you like it! Nikola

I was thinking of ways to make that hub better... But I agree, by far the best solution is to use separate battery and motor (LEGO or BuWizz).

Maybe someone will some day make a alternative battery with higher voltage and that way make the motors faster..

Is sharing pictures of the model among my friends considered "posting"? Also, are 3rd party motors (BuWizz motors) allowed?

Awesome!

Thanks. Could you show for what you use LEGO? I've used the fans the last week especially because it was really hot. I also brought them to school to cool us down and they were very usefull.