1968 Lotus Elan S4 on 2040-cars

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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 Advanced Performance offers hints about special projects

Four months ago, Lotus teased the creation of an Advanced Performance division. The legendary sports car maker divulged that the department would build "ultra-exclusive and unique vehicles" outside of the firm's regular-production lineup, developing Lotus race cars, manage Lotus motorsports programs, work on customer commissions and create customer experiences from Hethel production tours and track days to global driving academies and "money can't buy" opportunities. In further comments to Autocar and Auto Express, the head of Lotus Advanced Performance (LAP), Simon Lane, gave clues about what's coming. Lane suggested a number of creations, but the part we're most excited about is "while wider Lotus Group moves towards full-on electrification, LAP is 'reserving the right to still play with combustion engines.'" These ICE powerplants could be slated for coming restomod projects based on plans and technical drawings for Lotus products in the 1960s and 1970s that were never produced. Lane said his 15-person team is "well advanced" on work on what he calls "scratch build" vehicles that will hearken to vintage wares but be "easier to drive and maybe [have] a better power-to-weight ratio and better brakes." We love our electric cars here at Autoblog, but the idea of lightweight revivals recalling Lotus' best years with classic lines, small-displacement engines and maybe even manual transmissions would be glorious. These won't be continuation cars, but all-new products with production runs said to be smaller than anyone would expect.    It's possible we could see something this year, 2022 being the 50th anniversary of Emerson Fittipaldi and Lotus winning the 1972 Formula 1 Driver's and Constructor's Championships in the Lotus-Ford 72D. That might explain the teaser image from February, if not the colors of the car in the teaser. Know what other momentous Lotus moment occurred in 1972? The Esprit concept debuted at the Turin Motor Show. Lane, who comes from service in Aston Martin's Q division, calls LAP "the most all-encompassing special operations department" among automakers. That means there will be work done on the electric side, too, potential services being electric drivetrain conversions of traditional Lotus cars, and creating new bodywork for the new range of battery-electric cars.

Lotus Esprit spied wearing mismatched Evora bodywork

The sorta funky looking Lotus Evora you see above isn't really an Evora at all. In fact, it's a mule for an upcoming new Lotus in the spirit of the Esprit, which, rumor has it, will be introduced in the first half of 2021. It may even be called the Esprit, reviving the name of one of the company's most recognizable and well-loved nameplates, though that has yet to be confirmed by the British automaker. Power is expected to come from a Toyota-sourced V6 engine, as is the case with the Evora. But instead of the Evora's 2+2 seating configuration, the reborn Esprit would be a two-seater. While we aren't privy to the automaker's engineering offices, it seems the space vacated by the vestigial rear seating area might be used to hold some battery packs, as the upcoming car is going to be a hybrid. The 2020 Lotus Evora spins 416 horsepower out of its supercharged 3.5-liter V6; the hybridized Esprit is rumored to pack over 500 ponies, buoyed by an electric motor and lithium ion battery pack that's thought to be cribbed from the Volvo parts bin. That makes sense, as Lotus and Volvo both fall under Chinese automaker Geely's umbrella. The Evora offers the choice of six-speed manual or automatic gearboxes, but we'll have to wait and see if those choices are shared with the Esprit. The mule seen above is sporting some mismatched Evora bodywork — seemingly sprayed black in haste, judging by the specks of blue and yellow at the front and rear along with the lone green pop just ahead of the rear wheels — that has been widened with some tacked on wheel arches. The production version is expected to crib styling elements from Lotus' range-topping electric Evija. We can't wait to see how it all turns out. Related Video: