Science

Tesla Cybertruck: “good surprise” of the first aerodynamic test

The Tesla Cybertruck is an electric pickup truck that is very different from more traditional models. The first independent aerodynamic test confirmed this.

The Cybertruck’s unique design has long raised questions about the model’s effectiveness. The Tesla electric pickup, in addition to its size, has very sharp lines. Elon Musk’s firm hoped the concept could be more efficient than a classic pickup truck.

The aerodynamic coefficient (Cx) of pickups is typically between 0.55 and 0.65. Elon Musk was hoping that Tesla could get Cx 0.30 with his Cybertruck, which was being studied by an independent firm.

It was Numeric Systems who performed the CFD tests to establish the effectiveness of the sensor. The CFD simulation gave a result of 0.39 for the Cx Cybertruck. Alix Lazaro Prat, CFD engineer at Numeric Systems, describes the test results.

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It especially highlights the surprises that result from these simulations around the car’s aggressive lines. “Contrary to what many might think, the protruding edge of the roof doesn’t cause a lot of lift,” explains the engineer, noting the “pleasant surprise” of these results.

“It is true that the current is not attached, but the air follows the slope rather smoothly. This is quite remarkable and is a great advantage over other pickups. In addition, the diffuser creates a clean effect at the center rear of the car. This creates suction and reduces aerodynamic drag. »

Easily identified improvements

Like Musk and his goal of Cd 0.30, the engineer believes that Tesla can significantly increase the efficiency of the Cybertruck. According to him, the front of the car is the point where you can make the most progress.

“On the other hand, our results show distinct turbulent structures created by the front of the car, which connects the bumper and hood, the vertical lip behind the headlights, the wheel arches, the style of the rims, and the geometry of the body. Pillars A and C.

“The generation of turbulent structures is due to the sharpness of the edges. These geometric features increase the vehicle’s drag, which reduces the range of the Cybertruck. In addition, given the sharp rear end, the flow instantly breaks off and creates a noticeable low-energy zone behind the top and side edges. »

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