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This is how ground effects work in a nutshell

There are two ways to generate downforce. One is with all manner of wings and spoilers on the surface of the vehicle. The other is with ground effects. One you can clearly see, the other remains something of a hidden mystery. Fortunately, the good folks at Lotus and Goodwood are here to dumb it down for us non-engineer types. It's called Bernoulli's Principle, named after Swiss physicist Daniel Bernoulli who literally wrote the book on the subject way back in the 1700s. Countless engineers have spent their careers focused on its study and application, but the crux of the matter is that, as the speed of air (or other "fluid") increases, pressure decreases. Play with the air's increasing speed and decreasing pressure just right and you can generate downforce underneath the body of a car without significantly increasing drag as you would with surface spoilers. For evidence of how Bernoulli's Principle applies in practical terms, just look at the last Ferrari to pack a turbocharged V8 in the middle and the latest one. The F40 had a giant wing on the back, where the 488 GTB has none. But because the 488 uses underbody aerodynamics (or "ground effects"), it generates significantly more downforce than the winged F40 ever could, and at lower speeds. Ferrari, however, was not the first outfit to harness the power of ground effects. Lotus did with the legendary 79 that Mario Andretti drove to the world championship back in 1978. That was the genius of Colin Chapman, and to explain how it all works in layman's terms, our friends over at Goodwood Road & Racing brought in Colin's son Clive Chapman, head of Classic Team Lotus, to put together the video above. Related Video:

Lotus Evora 400 arrives in December for $89,900

It's been three months to the day since Lotus revealed the new Evora 400. And if you've spent the intervening time pining and wondering just how much you'd need to set aside to put one in your driveway, you need wonder no longer. The British sports car manufacturer has just released pricing for the new-and-improved Evora 400, which will retail at Lotus showrooms in America for $89,900. Now that's a fair bit more than it was charging just last year for an Evora ($68,400) or the Evora S ($78,480), but for all that extra scratch, you get a lot more. The 400-horsepower model packs 55 more horses than the Evora S, weighs almost 50 pounds less, features a new diff, carbon-ceramic brakes, bodywork and interior, and benefits from returned electronics, suspension, gearbox, and more. (Buyers will also be able to opt for an automatic transmission, upgraded interior trim, appearance package, forged alloys and painted calipers, all at additional cost.) The result of all those upgrades – costly as they are – is a 0-60 time of just 4.1 seconds, a top speed of 186 miles per hour and a lap time around the company's test track at Hethel clocked at 1:32 – a full six seconds faster than the existing Evora S. If that sound enticing, North American deliveries are set to commence in December. Related Video: Show full PR text Lotus announces prices for Evora 400 · Prices start at GBP72,000 (UK) · High level of standard specification · Fastest and most powerful production Lotus ever · Deliveries from August 2015 Lotus Cars is delighted to announce the prices of the new Evora 400. The latest supercar from Lotus combines high performance with the legendary Lotus benchmark handling and is lighter, more efficient and dynamically better than ever, providing a purer driving experience. UK prices will start from GBP72,000 (for other markets, see table below). For this price the car benefits from a high level of standard specification including 370 mm composite two piece brake discs from AP Racing, a Limited Slip Differential, automatic air-conditioning and infotainment system including satellite navigation. In addition to this, the options list includes automatic transmission at GBP2,000, Alcantara or Leather trim upgrades at GBP2,500 and metallic paint at GBP900.

Lotus said to be planning new sedan, crossover [w/poll]

Lotus has been in limbo in recent years. After former CEO Dany Bahar revealed his plans to build six new models, its parent company was sold, Bahar was sacked, his plans were canceled and a new CEO was hired in the form of former Peugeot chief Jean-Marc Gales. The industry has been waiting ever since to find out what Gales would do with the storied marque, and now we seem to have some indication.
Reports coming in from Malaysia indicate that Jean-Marc presented to the board of parent company Proton a plan for Lotus to build a new sedan and crossover. Though details are scarce, and may seem downright blasphemous for an automaker that built is reputation on lightweight sports cars, it would not be the first time that the House that Colin Built has toyed with either idea.
The company presented the APX crossover concept at the 2006 Geneva Motor Show, and the Eterne sedan concept as part of Bahar's far-reaching plans at the 2010 Paris Motor Show. The new plans may use these concepts as starting points or could go another direction entirely.