as pilnai sutinku su bubu issakyta nuomone. o cia siaip pasiskaitymui istrauka apie auto airodinamika:
How Automakers Improve Aerodynamics While some shapes are inherently more aerodynamic than others, aerodynamicists and designers subtly shape every vehicle to reduce drag. "We look at all areas of the car that come in contact with the air. Upper surface shape, under floor, wheels and even cooling and engine bay," says Ian Anderton, aerodynamicist at the Jaguar Design Studio in Gaydon, England. Automakers fine-tune the way the air attaches to the vehicle's surface, and the way it leaves the rear end.
To improve Cd (coefficient of drag), designers may make the following changes:
Round the edges of the front end
Tune the grille and fascia openings
Tune the wheel openings
Place spats (small spoilers) in front of the tires to reduce turbulence
Tune the size and shape of the outside mirrors and their attachment arms
Reshape the water channel on the A-pillars
Adjust the front fascia and air dam to reduce drag under the vehicle
Add side skirts
Tune the deck height, length and edge radius
Install a rear spoiler
Adjust the angle of the rear window
Tuck up the exhaust system
Use a diffuser to tune air coming off the underside
Install "belly pans," underbody panels that cover components and smooth airflow
Ford's Wegryn also predicts increased use of active aerodynamic devices in the future, such as:
Active air dams that drop lower at higher speeds (when driveways and speed bumps are not an issue)
Active rear spoilers that pop up to reduce lift at higher speeds, as on the Porsche 911 Carrera
Active ride height that lowers the vehicle at speed, which Ford employed on the Lincoln Mark VIII and which appears on Mercedes-Benz vehicles with Airmatic suspensions. According to Mercedes, "Lowering the ride height at speed results in a 3-percent improvement in drag."
How to Improve the Aerodynamics of Your Car Automakers spend a lot of time optimizing vehicles' aerodynamics. But is there anything we can do to improve — or at least not degrade — the aerodynamics of our own vehicles?
It turns out the biggest gains are to be found on pickups — not by dropping the tailgate (a common misconception), but by installing a tonneau cover. "A tonneau cover improves the aerodynamics dramatically — on all pickup trucks," according to Ford's Wegryn. "In general, a tonneau cover can provide a drag reduction of 2 to 7 percent, depending on cab style, box length and overall vehicle Cd. Average fuel economy improvement ranges from 0.1 to 0.3 mpg." From an aero standpoint, it doesn't make a difference if you choose a soft or hard cover.
You'll also improve aerodynamics by:
Reducing the use of roof racks
Rolling up your windows and turning on the air conditioner at higher speeds, typically above 35 mph
Replacing a broken or missing front air dam
Lowering your vehicle
Running narrower tires
Choosing smoother wheels (ideally, flush discs like those on vehicles trying to set land speed records)
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