20 Degree Bank-Approach mapped

We have recently mapped the curvature of the Tamiya Mini 4WD Junior Circuit 20 Degree Bank-Approach (Item No:69571) in order to study the effectiveness of brakes and flight trajectory. After several attempts, we have the result!

Some racers were using a cut out of a 20 degree bank-approach for setting up their cars and we managed to borrow one and did a trace to learn about the curvature of the section. The images above showed a trace of the section. The first image shows the curvature of the slope where as the 2nd image shows the section side view.

We scanned the images to the computer and then used some maths and CAD to map out the curvature.

The 20 degree bank section base length is 24cm. The slope is an arc of a circle with diameter ~132.1cm. The wall is also an arc of a circle with diameter ~119.5cm. Since it is a simple arc, you can easily replicate this on paper or cardboard or use a 3D printer to make a model to help you setup your brakes.

Here is a copy of the 20 degree bank-approach in SVG (vector) format. Hopefully this should make it easier for you to replicate this in CAD.

Have you tried to map this section yourself? What result did you get? Please feel free to discss on our Facebook page

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