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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.

Lotus is building 60 extra light, extra aerodynamic Exige Cup 380s

Lotus is never done adding lightness and once again turned its attention to the Exige. Like so many other special Lotuses, this one, called the Exige Cup 380, makes the same 375 horsepower from its supercharged 3.5-liter V6. However, the weight savings is a significant 117 pounds compared with the 2,447-pound Exige Sport 380. This savings comes from the inclusion of many carbon-fiber parts including a one-piece rear hatch, side intakes, hood, front splitter, side sills, and seats, among others. Lotus also removed the gas struts for the hatch to save 2.2 pounds. And if that's not enough, you can save another 2.2 pounds by choosing the optional HVAC and air vent surrounds, and 22 pounds with an optional exhaust system. The Exige Cup 380 also produces significantly more downforce than the Sport, 43-percent more to be exact. That results in maximum downforce of about 441 pounds at the Cup 380's top speed of 175 mph. The car achieves this thanks to a revised front bumper and splitter, vents above the front wheels, more vents behind the rear wheels, and a new rear wing. Even the windshield wiper rests in a vertical position to aid aerodynamics. The Cup 380 doesn't just benefit from better aerodynamics and less weight. The rear tires are wider than the Sport 380 at 285 mm. The Cup 380 also has two-way adjustable shocks and adjustable front and rear anti-roll bars. Even the stability control can be adjusted to the driver's needs. The car is stopped by four-piston brake calipers at all four corners, and a standard steel roll bar protects the driver. If owners wish, they can also add an FIA-certified full roll cage. Lotus will only build 60 of these Exiges, and they're only available in Europe. They're not cheap either. In the UK, buyers will spend GBP83,000 in the UK and ˆ109,900 in Europe. That means this Exige would cost between $106,000 and $118,000, at current exchange rates. Related Video:

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: