In Electrathon racing, wind resistance (drag) is the primary obstacle to maintaining high efficiency. Understanding the relationship between speed and air resistance is vital for any builder.

The 15 MPH Threshold #

Wind resistance becomes a noticeable factor above 15 mph. Unlike mechanical friction, which grows linearly, aerodynamic drag grows exponentially as your speed increases.

Design Optimization Strategies #

To minimize drag and maximize your range, focus on these two design pillars:

• Frontal Area Reduction: Minimize the “face” of the vehicle that first hits the air. The smaller the silhouette, the less air you have to move out of the way.

• Wetted Area Management: Reduce the total surface area of the body in contact with the wind. Every square inch of the vehicle’s “skin” creates skin-friction drag.

💡 Builder’s Tip: The Ideal Profile #

For maximum efficiency, aim for a teardrop or airfoil shape. These profiles allow air to rejoin smoothly behind the vehicle, preventing the low-pressure “suction” wake that pulls you backward.

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