The technology of Formula E (II): aerodynamics and energy saving

The Audi e-tron FE05 stands out for its aerodynamics, generated through a large diffuser in the rear. The Audi e-tron street reaches a coefficient of resistance of 0.28.


Eleven days ago the EPrix of Monaco was played in the Formula E, the fifth race of the season. The drivers of Audi Sport Team Abt had no luck. Lucas Di Grassi did not score after suffering a mishap and being out of the race and Daniel Abt was in 8th position, although after the race he was penalized and fell to 15th place.

Good results in the EPrix of Paris

The always complicated layout of the Principality left with bad taste in mouth to the team of Audi, although in the previous EPrix, in Paris, yes they obtained some great results. Daniel Abt took the podium of the French capital with a great third place. For his part, the Brazilian Di Grassi also showed a great level and managed to move from the 8th to the 4th final position.

Now wait for Berlin, where the pilots of the German team will try to make good the benefits offered by the Audi e-tron FE05. One of the most important features to be better than the rest is aerodynamics.

The futuristic design of FE05

The Audi car this season has no spoiler rear, a particularity difficult to see in motorsport. It only has a few small flaps on the back of the car. However, downforce is generated through a large diffuser in the rear of the car. This assumes that some fans compared the futuristic look of the vehicle with the 'Batmobile' or a spaceship.

And even, Daniel Abt stated , when he met the new model of Audi for the races of Formula E: "When I go out on track with the other cars, I feel like in a science fiction movie. Compared to its predecessor, the new model has a more aggressive design ".

The parts of the propulsion system improves by 95%, compared to last season. This means that the engine manages to reduce the weight by 10% and, together with the monocoque carbon fiber chassis, achieve a much more dynamic behavior.

The objective sought, when the Audi e-tron FE05 was created, has been achieved: to generate up to 250 kW (340 HP) in the qualifying sessions and 200 kW in the races. In addition, the 225 kW or 250 kW can be reached, on time, with the installation of the FanBoost (system in which the fans they vote their favorite pilots and the five most voted have a five-second period of power increase during the second half of the race) .

The aerodynamics of the Audi e-tron

If the aerodynamics of FE05 is one of the most noteworthy features. Not least in the Audi e-tron street. The Audi electric SUV is able to reach a coefficient of resistance of 0.28. This figure makes it the most aerodynamic premium SUV on the market and allows it to be key in achieving the goal of a range of 400 km, between load and load , in the cycle WLTP.

To achieve this low drag coefficient, the Audi e-tron has been subjected to more than 1,000 hours of tests in the Wind Tunnel Center that the German brand has in Ingolstadt. Audi engineers have optimized the aerodynamic drag of the Audi e-tron, subjecting it to extreme conditions, such as winds up to 300 km / h thanks to a 2.6 megawatt power fan.

Audi has developed a series of measures with the In order to improve the air flow throughout the body. Thanks to them, the electric SUV of Audi reduces the value by almost 0.07 compared to a similar car equipped with a conventional propulsion mechanics. In this way, they make sure to increase the autonomy in 35 km for each battery charge in cycle WLTP.

The measures adopted

One of the solutions has been replace the conventional mirrors by Audi virtual mirrors. Each of its flat supports integrates a small camera and captured images are presented on OLED screens, which are located between the dashboard and the door. It contributes to reduce the wind resistance and the width of the vehicle in 15 cm.

Otra measure is the inclusion of an adjustable adaptive pneumatic suspension. Allows the body to approach the ground up to 2.6 cm at speeds greater than 120 km / h, which helps reduce aerodynamic drag.

In addition, the fairing that covers the bottom of the Audi e-tron and that protects the battery has the inclusion of cavities the size of the dimples of a golf ball. These gaps improve the air flow on this flat surface.

The Audi Singleframe grille equipped on the Audi e-tron has controlled slats on theThey also help improve aerodynamics. When they are closed, the air flows without hardly forming whirlpools. When the engine and the front brakes demand more cooling, they open asymmetrically.

A this device is joined by four ventilation ducts in the 22222 side air inlets, which optimally direct the air flow in the wheel arches. The 19-inch wheels have also been optimized to reduce aerodynamic drag.

Finally, its permanent all-wheel drive, which distributes the power between the rear and front, helps maintain dynamic balance and agility, despite being a weight car.

Audi is showing that he is working hard to get his electric cars to become the best, both in Formula E and on the street. For now, are getting it with the Audi e-tron FE05 and the Audi e-tron, the electric SUV of the German brand.

Electric has gone Audi. And this is only the beginning.

* This content sponsored by AUDI has been developed by Diario As.



Photos from as.com

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