A couple of months ago I saw some guys on the Eurobricks forums trying to build a Lego RC car that can go faster than 40 km/h. Although I don’t have a properly working old Technic RC unit with the remote (somehow I have only faulty ones), I have the necessary amount of buggy motors and 2 BuWizz units, so I had to give this a try 🙂 The whole process turned out to be much-much longer than I expected, but at the end it was a success 🙂
I spent several weeks creating, improving and testing the car. The basic idea was to use 2 BuWizz units, 4 buggy motors and 4 Technic motorcycle wheels and to add only the minimal amount of components to create the lightest and fastest BuWizz powered Lego Technic car. It had to be solid enough to survive all the crashes during the tests and record breaking attempts.
I had several tests at various locations until I found a proper track and the final configuration of the car was created. During this time a lot of parts had to be replaced as the axles were bent after a couple of runs.
The car does not have a conventional steering to reduce weight. For the speed runs only small adjustments are needed, so the direction of the car is controlled by the speed difference of the wheels – there are two control sliders on the phone for each side of the vehicle.
The speed was measured with the on-board GPS unit. The car was controlled mostly with my phone, but for the fastest run I was using an iPad (longer range). Even like this at full power the car ran out of range very quickly.
I think it would be possible to go even faster with this car, but that would require a completely flat surface and a chase vehicle to ensure the controller stays in range. Maybe another time 😉
A brand new type of video from RacingBrick – stop motion brickfilm! 🙂 It’s a short teaser for my BuWizz powered Lego Technic RC speed record breaker. Join my little helpers to see the final tests for this beast and see the wheels spinning over 3000 RPM!
Since I received many requests again to provide instructions for the wheeled speed recorder Lego Technic 42069 Extreme Adventure RC mod, I try to help you and took a series of pictures while disassembling the model.
Please note that this video is far from being a complete guide – it shows how to build the 2 axles with the 4 buggy motors.
This is my third and last Lego 42069 Extreme Adventure remote control mod. After the Superleggera mod I did not plan to create another one but I was convinced by some comments on my YouTube channel (thanks for the tip!). Although I really liked 42069 on tracks, I realized that the top speed was limited by the construction so the 4 buggy motors could not show their full potential. I removed the tracks and added the wheels from the 9398 Crawler set.
The pickup-style body was kept from the previous mod to ensure the car is as light as possible. The axles were rebuilt completely to fit the buggy motors and the wheels.
The car is driven by 4 buggy motors and there’s a PF Servo for steering. It is controlled and powered by 2 BuWizz units. It became surprisingly fast, I was curious so I added a small GPS tracker to measure the top speed – you can check the result in the video 🙂
Lego has organized recently another Rebrick contest with the Mercedes AMG Petronas F1 Team – the goal was to create the F1 car of the future. I wanted to create a car that looks somehow futuristic but looks like an evolution of the current cars, and represents the color scheme and the logos of the team. As I do not have too many non-Technic bricks I decided to create a digital entry. I started to build with LDCad, that’s the application I’m more or less familiar with. I started to sketch some ideas but the summer holidays came so I forgot about it. I only realized the deadline 3-4 days before it arrived, so I had to act quickly 🙂 I finished the build in LDCad, but as it does not offer any rendering abilities I had to look quickly for a solution. The Ldraw-Povray connnection was not that easy to figure out in such a short time frame, so I had to look for something else. I considered rebuilding my car in Lego Digital Designer as there are multiple good rendering options for the official app, but unfortunately I used some pieces that are not available in LDD.
I’d like to share a small but agile creation – the remote control mod of the 42033 + 42034 Extreme Off-Roader combined set. Additional parts (mostly for steering) were used only from the set 42035 Mining truck.
Lego Technic 42037 Formula Off-Roader upgraded for full remote control. Engine swapped, it has a V8 now. Driven by two buggy motors, powered by 2 BuWizz units. Steering with Power Functions Servo motor. Engine powered independently with a Power Functions M motor. Installed Power Functions Lights as well.
After my first RC mod of the 42069 set I wanted to build something faster 🙂 The plan was fairly simple – remove every non-vital part (including the fake V8, sorry), streamline the body as well, finaly add 4 buggy motors and 2 BuWizz units. The result is pretty fast cosidering the size and the tracked wheels, check out the video: