I made this project some months ago and decided to upload it. All in all it was a very enjoyable process to design, build and test this RC car. Actually, it was so enjoyable that I decided to do it again. The new version will be released in a couple of months and has improved performance.
This is a project that can take some time so dedicate a weekend to it.
- great handling at low speeds (< 40kph/25mph)
- incredible straight-line speed
- very high power to weight ratio (around 1.1 hp/kg)
- maybe the cheapest way to reach 46 mph/74kph (this is the highest recorded speed)
- fun to drive. Most RC cars have gearing that limits their max speed. Slimspeed has gearing for 180kph/111mph. This means your speed is only limited by driver skill, air resistance and how long the road ahead is.
- large steering radius (designed for stability reasons)
- can be tedious to build since there are no exact instructions (however not too bad)
- no serious off-roading possible
- braking hard causes vehicle to turn around and reverse while braking. This could be useful if you want the car to turn around and have it head back to you. Otherwise, it is not very useful.
Building this RC car shouldn't be too hard. As long as you use the parts listed below, the assembly process will be pretty straight forward. I will not make exact instructions since this is an old project. Therefore when it comes to things such as soldering the power connectors and selecting which screw length is appropriate, you will have to decide for yourself. Alternatively, you could ask in the comments if you have any questions.
The reason for not making full instructions is that I am working on a new improved RC car that mostly uses the same parts. This way you can reuse the parts you bought for this car and use them in the new design. Almost like plug and play. Follow my Thingiverse page if you would like to see that version in the future.
Once again, if something is not clear or you have any thoughts/questions. Please comment and I will help you out.
For most parts, just use common sense and place them so the bottom is as flat as possible to the print surface. Some parts need support, for instance, the front and rear axles. But others do not.
When printing the spacers for the bearings, I used a 20mm/s print speed to ensure accuracy and to reduce overheating the part. This is quite important for good results.