Fast Rubber Band Powered Car Toy

Hello, I am a 6th grade student at Forest Middle School in Virginia. I play a lot of sports and love nature. Ever since I started middle school about 5 months ago I have started to do a lot of things that have to do with engineering and architecture so I am very excited to have built a fully 3d printed car toy. It takes 2 3d prints and is designed as a toy for kids, but I really enjoyed it.(P.S., I made this all by myself)

Supplies

Autodesk Tinkercad
3D Printer
Filament

Design the Body

To start, we need to get an idea of the shape of the item. I got on Tinkercad and designed the car using the sketch tool. I then copied the car, made it smaller, and turned it into a hole underneath the car to make it hollow on the inside. Now we can fit all of the gears, the wheels, and rubber bands on the inside

Design the Wheels

For this step, I designed the wheels and axles. I made a long and skinny cylinder then tilted it 90 degrees for an axle. Then I put on the wheels by making an extremely short and wide cylinder. In the middle of the back wheel there is a small stick that the rubber band can go on. This makes it so that the rubber band can be attached to the front of the car and when we wind it back it will go.

Making Details on the Designs

Now that we have a base of what we're working on, we need to add some details. I used the sketch tool on the windows and the box for the lights. on the wheels, I used cylinders to make a gray wheel with black tires behind them. I also put a picture of the instructables robot on the top for decoration.

Attaching the Wheels and the Rubber Band

For this step I built a hook using the box and a holed cylinder. The hole is slightly bigger than the axle making it so that The wheel can turn but not fall off. Also, in the 2nd I added a red rubber band holder so that you can attach a rubber band on to that and onto the back axle so that you can pull it back then release.

Conclusion

In the end, I 3d printed it and it worked. There were some weak spots but for the most part I thought that it was a success. It was a cool toy and I am very glad it worked. If you have gotten to this point, thank you for reading through my instructable.