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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 reveals new LMP1 at Le Mans

Lotus is at Le Mans this week where it has unveiled its new LMP1. Only it's not racing at Le Mans. And it's not really a Lotus, either.
The prototype belongs to an independent German team that ran a Lotus chassis in the LMP2 category last year, but was granted license by the FIA and ACO to step up to the top-tier LMP1 category to dice it with the front-running hybrids from Audi, Porsche and Toyota this year. Unfortunately, the team - which licenses the Lotus name from the automaker, much as the F1 team does - faced some setbacks. Not the least of those delays resulted from a mid-stream switch in engine suppliers from the Audi-sourced, naturally aspirated V8 it was originally set to use to a new turbocharged V6 from Advanced Engine Research.
As a result it wasn't ready for the Silverstone race that kicked off this season's World Endurance Championship in April. Nor was it ready for the second round at Spa in May or not for the headline event this weekend at Le Mans, but it aims to be on the track at the next round in Austin.

Now’s your chance to buy Lotus founder Colin Chapman’s 1981 Turbo Esprit

Lotus founder and Chairman Colin Chapman’s former 1981 Turbo Esprit Series 3 sports car is for sale, and it looks fantastic in its metallic silver exterior imprinted with “turbo esprit” on both sides and the bonnet, and contrasting red leather interior. Built in February 1981 but not registered until August, it was ChapmanÂ’s personal car until his death in late 1982, and was also driven at one point by former Lotus Formula One driver Elio de Angelis. Chapman even arranged for British Prime Minister Margaret Thatcher to drive it, at the Norfolk Airport in 1981. Thatcher was quoted in the local paper as saying it was “lovely to drive.” Right, then. Lotus built the car to ChapmanÂ’s specifications, with a lowered and modified suspension, modified bodywork to reduce wind noise, special brake pads and features like power steering and air conditioning that didnÂ’t figure in production models. Chapman, who suffered from hay fever, also had pollen filters installed, plus a roof-mounted Panasonic stereo system. ThereÂ’s also a specially assembled, blueprinted engine; Esprit Turbos of that model year featured a 2.2-liter turbocharged inline-four that made 210 horsepower and 200 pound-feet of torque. This was also the first Esprit model to be fitted with BBS alloy wheels. After ChapmanÂ’s death, the car was maintained for a few months by the companyÂ’s Factory Service Department, and eventually made its way to a succession of private owners. The car is currently on its sixth owner across seven transactions (one ended up re-acquiring the car), but it has just a hair over 11,000 miles on the odometer, with a new clutch slave cylinder and radiator core installed in the past decade. “This vehicle has lived a pampered existence and is a testament not only to its rich pedigree but to those who have cared for it over the years,” says the listing at Mark Donaldson Ltd., which claims it comes with extensive records. According to Top Gear, the seller is looking to fetch at least 80,000 pounds, or around $97,000. Related Video: