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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 Esprit S1 gets wet and wild in 'Forza Horizon 4' James Bond trailer

It only makes sense. When the official trailer for Forza Horizon 4 ( FH4) first debuted at E3, details showed the game is set in Britain. Those who were ahead of the curve might have recognized this as a foreshadowing of sorts. Celebrating the launch of FH4's XBOX One and Windows 10 demo on Sept. 12, Playground Games announced that the next version of the beloved racing simulator will launch with an available Best of Bond pack that includes many of James Bond's storied rides. As expected, the list is heavy on the Aston Martin, but there are plenty of other goodies, too. Included in the 10-car pack are the 1964 Aston Martin DB5, a 1969 Aston Martin DBS, a 1986 Aston Martin V8, a 2008 Aston Martin DBS, a 2015 Aston Martin DB10, a 1974 AMC Hornet X Hatchback, a 1977 Lotus Esprit S1, a 1981 Citroen 2CV6, a 1999 BMW Z8, and a 2010 Jaguar C-X75. If you can name every movie that all of these vehicles are from, pat yourself on the back and grab a martini. View 15 Photos Microsoft is rewarding those who are all-in on FH4. The Best of Bond pack will come with the Ultimate Edition of the game that is allowed an early play date, starting Sept. 28. For those who haven't fully committed, the Best of Bond pack will be available as an add-on for purchase when the game launches globally on Oct. 2. The action-packed trailer shows many of the vehicles transforming or busting out tricks they're known for from the films, including the Lotus emerging from the sea. Although players will not be able to drive any vehicles under water (that we know of), several of the gadgets will make it into the game and will be viewable during Forzavista mode. The '64 DB5 has many of its features, such as the bumper rams and revolving license plate, while the Lotus will have an available body kit, fins and all. The Bond pack also comes with a few features irrelevant to the cars, including two Bond outfits and six "quick chat" phrases that can be used during multiplayer. The pack adds to an already impressive catalogue of vehicles that includes more than 450 different rides. Available now to pre-order, the FH4 Ultimate Edition is priced at $99.99, the Deluxe Edition is $79.99, while the base game is $59.99. For those who love Bond but don't own a gaming system, don't forget about the recently announced DB5 Lego kit.

Lotus CEO Jean-Marc Gales abruptly quits

Jean-Marc Gales is out as CEO at sports car maker Lotus after nearly four years and a track record of turning the company from years of financial losses to a small profit. He'll be replaced by Feng Qingfeng, vice president and chief technical officer of China's Geely Auto Group, who joined the company's board after Geely acquired a majority ownership stake a year ago. Gales will continue as chief strategic advisor to Lotus Chairman Daniel Donghui Li. "Jean-Marc has stabilized and turned Lotus to profitability for the first time in the iconic brand's history, with new industry-leading products and unique business models since joining the company in 2014," Daniel, who is also Lotus' chief financial officer, said in a statement. "Lotus is poised for the next phase of growth under Feng Qingfeng's leadership, where its expertise in lightweight materials and sports car engineering will form part of the wider expansion of Geely's automotive portfolio." Gales told Autocar he was leaving for "personal reasons" and said it was "time to move on." He will head up JD Classics, a British dealer and restorer of classic cars. Gales praised his successor, saying Feng could "unlock the synergies" between Geely stablemates Lotus, Volvo, Polestar and Chinese brand Lynk & Co. Lotus under Gales had been working on updating its aging portfolio of cars — the Elise, the Exige and the Evora — with plans to first update the Elise by 2020. Earlier this year came word that Gales had green-lighted two new sports cars, to be announced later this year and produced in 2020, and an SUV about the size of the Porsche Macan and possibly based on Volvo's SPA platform, which underpins the XC60 and XC90. Lotus under Gales saw sales increase 10 percent in 2017 to about 1,600 sports cars. Related Video: