Rimac Nevera, Tesla Roadster, Lotus Evija and all electric hyper-cars top speed is considerably more modest, while the 0-60 mph acceleration figures are above average, the Nevera tops out at 258 mph with the power output equivalent to 1914 horsepower However already in 1987 the Ferrari F40 became the first street-legal car to go 200 mph, and in 2005 Bugatti’s Veyron hypercar broke the 250 mph barrier with 1001 horsepower. In late 2019 the Bugatti Chiron Super Sport reach 300 mph became the first production vehicle to ever and in 2020 the SSC Tuatara set the US Guinness World Record with 316 mph top speed.
#TopSpeed, #RimacNevera, #BugattiChiron
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Impressive as these automakers innovations have been, non of it would be possible without the way testing has advanced. An aerodynamic simulation that took a week to run 10 years ago, can now be done in few hours, allowing new solutions to be tested immadiatly. The Rimac engineering team ran thousands of CFD simulations for Rimac Nevera. Each simulation model consists of over 120 million elements with up to 180 million for the detailed heat transfer models. More than 100 components were exchanged during the tests to confirm the correlation and characteristics between the CFD simulation results.
The Nevera has been subjected to a multitude of changes since its early days, resulting in a 34 percent boost in aerodynamic efficiency compared to early prototypes. Enabling "Low Drag" mode reduces the Rimac Nevera drag coefficient to 0.30 Cd while changing back to "High Downforce" boosts downforce by a whopping 326 percent. The sleeker body has also been fine-tuned for better cooling efficiency of the powertrain and brakes. At low speeds, a 30 percent improvement has been achieved, and seven percent once the Nevera reaches higher velocities.
Tesla usually makes a big thing about the drag coefficient of their vehicles, the Model S achieved 0.24 Cd while the Model 3 reached 0.23 Cd drag coefficient., and Elon Musk making sure to announce it in the cars release presentation. However, a statistic was omitted from the Roadsters launch ceremony. It may be that Tesla simply wasn’t close enough to the final production model of the vehicle to accurately predict the drag coefficient.
The goal of the engineers when design a hyper car body is to eliminate as much drag as possible. No car does this better than the Koenisegg’s Jesko Absolut. Based on the company’s Jesko hypercar, the Absolut is estimated to reach as much as 330 mph. The Jesko Absolut has a drag coefficient value of only 0.278 Cd. The low drag in combination with a frontal area of 1.88 m2 in combination with a power level of minimum 1600 hp, make the Jesko Absolut destined to achieve higher, more extraordinary speeds than any Koenigsegg or any other fully homologated car before it.
