Dimensions of The Car

Length: 7.15"
Width: 5.75"
Height: 3.15"
Wheel Diameter: 3.2"

Weight

503g

Charge Time

About 2h 30min

Battery Life Time

About 300 cycles

Range of speed

Together with Vincent Lu and Yingjie Zhao, I hook a ToF on the front of the car and drive it to maximum speed while recording the data. Then I use part of the data with a smooth drop in the middle to calculate its speed.

From the data, we can see a trend:
1. At the very first, the distance is too long that exceeds the range of the ToF
2. Then the car goes into the range and continues its uniform motion and the distance decrease linearly
3. The car brakes which leads a reverse of the car, making the distance rapidly goes to 0 and then goes to large (The facade of the sensors faces to the ground and then faces to the roof)

So I only take the linear part of the line to calculate the velocity of the car:

In the graph above we can see that the velocity of the car is about 3.1246 m/s

Braking Distance

From the video above, we can see that the car will do a flip when braking at full speed, which means the braking distance is the same as it length: 7.15"

Stunts

Push right/left until the car spin fast and then suddenly push up/down to make the car dance

Truning Reliably

It is quite reliable.