How to Build a 3d Printed C02 Car

This car started as a school project using drawings and wood, but the teacher had made an exception for me because I knew how to 3D model. In this instructible, I will show you how you can do this yourself, with the modified 3d printed version.

3D Print

1. access to a 3d printer (or use a 3d printing service)
2. filament

Others

1. CO2 Cartridge
2. Push rod
3. Front wheels
4. axles that are 1/8 of an inch thick

Tools

1. Tweezers
2. Light Mallet
3. Bolt Cutter to cut the axles

First, use whatever 3D modeling software you like (I used Onshape) to model whatever car you like, or find a model online and remove the wheels. If you just want to race, download the file at the bottom of this guide.

If you are modeling your own, remember to have a hole that is 20 cm in diameter, at least 3 mm of space around it, and 5 cm deep. Also, have axle holes that are at least 0.13 inches in diameter so you can fit the wheels. Also, for safety, put a area in the bottom to put fishing line through your car in case it goes off track.

Print the model that you made. I would suggest being there for the full print as errors with supports can happen, but it should be fine.

If you have a hollow design, use the hammer and the tweezer as a chisel and hammer away the inside supports before using the tweezers and snapping off the rest.

Put the axles into the car and put the wheels on.

Align a starting line a finish line and run fishing line through the bottom of your car, then insert the CO2 Cartridge, and activate the cartridge!

These are the 3d models to my car, as well as pictures of the print.