DESIGN:

The start of this project was designed individually through SolidWorks. I designed a sled pulled by a string (using a Rack and Pinion mate). This took 7 seconds with a maximum velocity of 800 deg/sec to reach 10 feet in the simulation. I also did not include any rubber for the bar to sit on which would have helped decrease the time as well.

Check out the CAD Assembly here: 

https://drive.google.com/drive/u/1/folders/1jaHcrz8mDOpgGtFbbW4RncO_7n-q1VaE

BUILDING:

The car was constructed using cardboard and plywood supplied through the stock in EPIC. All complex parts such as the wheels, gears, and spacers were laser cut. Any cardboard pieces were connected using hot glue, while the wood spacers were connected visa super glue. A rubber pad was also placed on top the cart for additional friction using super glue. The motor, H-Bridge, and Arduino was mounted using painters tape. The axels are metal and were connected to the motor using two laser cut gears.

One major design change was that we were initialy going to 3D print a spool and use that to pull the cart. However, since the print was not done by Monday, we instead had to change to using gears to power the cart like a car rather than pulling it. 

TESTING:

Finally, the cart and motor were tested with a 12 in Aluminum bar. The final run took 5.5 seconds for the cart and bar to reach 10 feet traveled.