• NATALIA SOUSA

Rimac C_Two, Final Aerodynamic Testing - Video & story.

For the last two years, RIMAC the Croatian Hyper Sports Car Manufacturer has been exposing three different generations of its C_Two prototypes to a series of wind tunnel tests. The testing's primary goal is to ensure the vehicle's aerodynamics perform at the optimum level in terms of performance, range, and efficiency when considering the wind's impact on the vehicle.


The engineering team ran thousands of CFD simulations for C_Two. Each simulation model consists of over 120 million elements with up to 180 million for the detailed heat transfer models. With real-time testing, it is critical to validate expected results. The real-time tests are conducted in a controlled wind tunnel testing environment and on track.


During the tests, RIMAC's engineers assessed the car against three fundamental aspects: car efficiency, cooling performance, and active aerodynamic systems. All of which is even more important for an electric car than a traditional internal combustion-engine one. For example, on long-distance trips, the demands for cooling will naturally be lower than when C-Two is being driven on the track. Simultaneously, ensuring optimum range from its batteries and the car's overall ability to harness its immense power and torque entirely is also crucial.


The car's aerodynamics play a vital role in this regard. The C-Two has been carefully designed and engineered with this element firmly in mind. The C-Two has four specific active aerodynamic parts. Everything from the active front splitter and intelligent underbody air flaps to the adaptable air brake wing proves the C-Two is shaped by performance.

The tests have all already gone exceptionally well in terms of correlation with our simulations. From the initial C-Two concept to the validation prototype, aerodynamic efficiency has been improved by 34% as a result of continuous optimisation.

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