At the Bridgestone World Solar Challenge, innovators and motorsport experts competed to race solar-powered cars 2,000 miles across the Australian Outback.

Reminiscent of the 24 Hours of Le Mans, when Interwar Period engineers tried to balance speed, maneuverability, and durability with wild designs, some of which eventually became road-standard, the World Solar Challenge hopes to push engineers to develop sustainable solutions to challenges facing electric automotion today.

This year, the spirit of innovation and problem solving was pushed even further, as along with racing from Darwin to Adelaide, the challenge took place in the wintertime, with 20% less sun than in other Australian seasons.

When looking at the cars, the first thing one notices is how much they look like aircraft carriers—a necessity for fitting enough solar panels to charge the batteries.

The other boat-like design is their narrow undercarriage and hull-shaped sides which help make them more aerodynamic. Much of the actual horsepower of an average car comes from pushing the air out of its way. The more aerodynamic a car, the less wind it must move, and the less energy it consumes.

This year however, even with these radical body shapes, the contests have had to push further the bounds of aerodynamism and efficiency.

“Fins are the flavor of the month, or certainly the flavor of this event,” said one organizer.

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Indeed many of vehicles sported one or even two hi-tech fins. The Millennium car from the University of Michigan team uses its fin like a combination of the rudder and sail on a boat, generating forward thrust while also stabilizing it in crosswinds.

“This event is very relevant to look at the future,” said Bridgestone Vice President Hiroshi Imai, in a report from Reuters. “Even near-future technology may come from this kind of event.”

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The Dutch team Brunel Solar eventually won the race, arriving in Adelaide 34 hours after leaving Darwin. Their car, the Nuna 13, had not one but two fins, which it used to achieve higher speeds without extra energy consumption.

WATCH the video below from Reuters… 

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