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Lotus Evija's wild aero setup is detailed by chief aerodynamicist

The Lotus Evija is a car of firsts for Lotus. To that end, the company has spent a lot of time talking over the details. Today, we get to learn about the wild shape’s aerodynamics and what Lotus engineers were trying to accomplish. Richard Hill, chief aerodynamicist for Lotus takes a dive into all the details, and the video at the top of this post offers a great visual. “Most cars have to punch a hole in the air, to get through using brute force, but the Evija is unique because of its porosity,” Hill says. “The car literally ‘breathesÂ’ the air. The front acts like a mouth; it ingests the air, sucks every kilogram of value from it – in this case, the downforce – then exhales it through that dramatic rear end.” We can see what Hill means as we look at the Evija in photos. Instead of a regular front bumper, this one has pass-throughs that direct the air back into the side of the car. Lotus hasnÂ’t released the all-important coefficient of drag figure yet, but we have to imagine itÂ’s very low. The front splitter (below, left) is responsible for a few different things. The opening in the center takes in air to cool the battery pack that is mounted behind the seats. Then, the outer section of the splitter channels the air to the “e-axle” for cooling of the electrical components. And finally, it also produces downforce.  There are a couple more tunnels for air to pass through in the rear. These “holes” are likely the most distinctive design feature, especially when accentuated with the LED taillights. Hill says that these are also fully functional and help to reduce drag. “They feed the wake rearward to help cut drag,” Hill says. “Think of it this way; without them the Evija would be like a parachute but with them itÂ’s a butterfly net, and they make the car unique in the hypercar world.” On top of all these porous body structures, there are pieces that move. The rear wing can elevate upward from its flush body position and deploy into clean air above, creating more downforce. And then thereÂ’s an F1-style drag reduction system. This uses a horizontal plane that deploys from the car to make it slipperier through air. The final big piece of this puzzle is the underbody sculpting that directs air into the massive rear diffuser. This causes an upwash of air, in turn creating a massive amount of downforce. Hill sums it up quite nicely.

Aston Martin and Lotus each issue recalls

A pair of head-turning high performance cars are catching some attention off a different kind, in the form of safety recalls. Aston Martin and Lotus have issued recalls for the V12 Vantage Coupe and Evora, respectively.
Aston Martin's affects 169 examples of the 2009-2012 V12 Vantage Coupe. It concerns the tire-pressure monitoring system, and is less a malfunction than it is a compliance issue. The TPMS does not alert the driver until the front tire is more than 25 percent below the recommended cold tire pressure. Federal Motor Vehicle Safety Standard No. 138 states that the alarm must sound when tire pressure is "equal to or less than either the pressure 25 percent below" the recommended cold inflation pressure. To address the issue, Aston Martin will notify owners and reprogram the software, free of charge.
As for Lotus, 80 supercharged Evoras have been recalled, all built between February and September, 2011. The problem involves an engine-mounted oil feed pipe, which could rupture, causing loss of engine oil or a possible fire if the oil sprays onto a hot engine.

Banned Lotus 88 F1 car explained by Colin Chapman's son

Racing teams are always looking for ways to gain speed through creative interpretations of the rule book, but speed-obsessed engineers were a little too clever with the twin-chassis design for the Lotus 88 Formula One car. Colin Chapman's son, Clive, gave Goodwood the racer's fascinating story and why the organizers banned it. Lotus' innovation with the 88 was a novel twin-chassis layout. The outer chassis supported the aerodynamic elements and the body, and the inner one held the driver, engine, and transmission. The separate pieces allowed the car to meet the rules in the pits, but the outer chassis would create a seal with the track at speed to preserve the ground effect downforce. The organizers decided this ingenious solution went contrary to the rules against side skirts, and they banned the 88. However, this Lotus was important for a second reason. The inner chassis was F1's first carbon fiber monocoque. The lightweight material is common in racing and performance cars today, but it was a cutting-edge innovation for 1981. Get the full story from Clive Chapman in this clip. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.