Both of the cars have the same drag coefficient of 0,26. How?

Both of the cars have the same drag coefficient of 0,26.

How?

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  1. 4 weeks ago
    Anonymous

    I don't understand the question, which part don't you understand? The bigger car might be smoother, for example the door handles are sunk and the wheels are flatter. Electric cars also don't have wind tunnels going through the engine bay

  2. 4 weeks ago
    Anonymous

    Might be a lot subtle things like the shapes of the wheels & wheel wells, plastic under the car (it's not just there to keep pebbles away from the body), cooling air intakes, little details in the rear to help the airflow detach cleanly instead of generating drag, etc.
    With all the computer aided design/manufacturing tools they have. they can simulate this stuff pretty well these days, and even 3D print mockups for wind tunnels to verify the results.

  3. 4 weeks ago
    Anonymous

    drag coefficients are weird, but for reference, the g35 at launch had a better drag coefficient than the c5 corvette

    • 4 weeks ago
      Anonymous

      Pretty cool chart, thanks for sharing anon

  4. 4 weeks ago
    Anonymous

    Electric cars have flat undersides instead of axles, exhausts and tubing running everywhere. Underside is a hugely underestimated part of drag

  5. 4 weeks ago
    Anonymous

    Drag COEFFICIENT does not count area just the shape. Make the left car smaller by mspaint and you see

    • 4 weeks ago
      Anonymous

      Now multiply it by the area that the wind hits.

      This.

    • 4 weeks ago
      Anonymous

      The image shows the vehicles the same size, and it's obvious why the left has a better rating.

  6. 4 weeks ago
    Anonymous

    Now multiply it by the area that the wind hits.

  7. 4 weeks ago
    Anonymous

    Diffusers play a part, older cars almost never had them but every new car has some sort of diffuser.

    • 4 weeks ago
      Anonymous

      That's a fisher price diffuser bro, it does nothing except "look aggressive"

      • 4 weeks ago
        Anonymous

        That's what he said, these diffusers just add drag at zero performance gain

        The drag coeficient may be the same, but the drag coefficient x frontal area is much better on the right.

        Frontal area is included in the calculation for drag coefficient, dumbass
        >The reference area depends on what type of drag coefficient is being measured. For automobiles and many other objects, the reference area is the projected frontal area of the vehicle.

        • 4 weeks ago
          Anonymous

          Eh, I doubt they add appreciable drag either, it's really just a cosmetic feature.

        • 4 weeks ago
          Anonymous

          No it's not. The often quoted number, Cd, is a dimensionless number that qualifies the whole shape. CdA is the number that accounts for frontal area, and it's much higher than the cd (because cars have more than 1m2 of frontal area)

          For example the opel calibra has a cd of 0.26, but a cda of 0,47 m2 because it has 1,8 m2 of frontal area. The old tesla model s has a cd of 0,24, but because it has 2.3 m of frontal area it's cda is 0,56 m2. Only the new model s with a 0,2 cd can actually match the calibras overall drag, at a cda of 0.47 m2.

        • 4 weeks ago
          Anonymous

          >Frontal area is included in the calculation for drag coefficient, dumbass
          Hahahahaha morons are so confident it's cute

      • 4 weeks ago
        Anonymous

        What are you talking about?
        You can clearly see wind channels in it.
        It's not going to be as effective as it tries to make it look, but it's doing a lot better than a big cavity with a muffler in it.

        • 4 weeks ago
          Anonymous

          They could make it aerodynamic without making it look like a fisher price diffuser that doesn't do anything

          • 4 weeks ago
            Anonymous

            Yeah they could.
            But you're still wrong that it "does nothing except "look aggressive""

          • 4 weeks ago
            Anonymous

            Any effect is coming from the fact that the axle-to-bumper cavity is enclosed. The fake diffuser styling isn't doing anything.

          • 4 weeks ago
            Anonymous

            Except it clearly has wind channels, in an area no one can even see.
            Just because they're not six inches deep like in your video games, doesn't mean it's not functional.
            Also
            >moving goalposts

          • 4 weeks ago
            Anonymous

            What exactly do you think these wind channels on fake road car diffusers do? Diffusers work on racecars because they have a full underbody and they're like 2 inches off the ground. They're for generating downforce.

  8. 4 weeks ago
    Anonymous

    The drag coeficient may be the same, but the drag coefficient x frontal area is much better on the right.

  9. 4 weeks ago
    Anonymous

    israeli propaganda. if drag coefficient was real big rigs would fly around on a windy day and children would run faster than adults. it's nonsense. are top runners small and aerodynamic? no they're tall af

  10. 4 weeks ago
    Anonymous

    Drag coefficients and frontal area aren't the same thing, go lrn some frickin sience moron.
    Drag coefficient =/= drag

    • 4 weeks ago
      Anonymous

      This. Take a look at the drag formula - there’s the coefficient and the frontal surface area.
      There’s no way the smaller car has higher surface area than a fat ass suv, so in the end it may have lower drag, depending on how different they are.

      Another important factor here is that there isn’t a perfectly standard method of determining either cd or area. Take a car to a different wind túnel and you’ll get a different reading. Manufacturers pay a lot of these variances to their favour.

  11. 4 weeks ago
    Anonymous

    >coefficient
    You don't understand what that coefficient means.
    Car on the left has way higher drag than one on the right.

  12. 4 weeks ago
    Anonymous

    I still can't fathom how the incredibly mediocre Vectra got turned into the most aerodynamic production car for about a decade

  13. 4 weeks ago
    Anonymous

    Aerodynamics are for people who can't build engines.

    • 4 weeks ago
      Anonymous

      t. Enzo Ferrari when his cars started losing

      • 4 weeks ago
        Anonymous

        incorrect. Enzo couldn't build an engine and didn't know aero. when he started losing he cried like a b***h to officials and sucked dicks till they changed rules in his favor. Ferrari was never good, and that's why Ford plowed his wife right in front of him. which of course made him cry and get rules changed

        • 4 weeks ago
          Anonymous

          Ford were the great Satan at Le Mans, throwing millions at a vanity project to spite someone who didn't let them get away with a rugpull

          • 4 weeks ago
            Anonymous

            >Le Mans
            You mean the event historically known for banning any thing that beats europoor brands?

          • 4 weeks ago
            Anonymous

            Kinda like how NASCAR banned foreign marques and removed most road courses from the calendar in the 50s after Jaguar and MG dominated the road courses?

          • 4 weeks ago
            Anonymous

            but MG and Jaguar got BTFO in nascar?

          • 4 weeks ago
            Anonymous

            It's not like lemans only bans non european cars, the car that stayed banned from lemans the longest was probably the maserati mc12 gt1 just because it was too fast. They had to ban the porsche 962 because as a road car it was owning actual prototypes and was about to dominate their top level gt1 class meant for road going sportscars, and even the viper was banned alongside many other european cars with large engines, like the lister storm...

            Now if you were talking about the nurburing 24h trying to ban any non german car from winning repeatedly you'd be right, but to be fair the ssca did the same when the audi quattros dominated transam and imsa...

          • 4 weeks ago
            Anonymous

            Yeah the whole ford vendetta thing was lame. Euros were all running enlarged versions of their 3 liter engines and ford comes along with 7+ liters like some moron who just doesn't get it.

          • 4 weeks ago
            Anonymous

            lmfao at the fan boys cucked hard still not getting it. say the line again. Americans can't turn lmfao. they win your races though when they bother to give a minimum effort lmfao.

          • 4 weeks ago
            Anonymous

            The GT40 is a British car with a Ford swsp though

          • 4 weeks ago
            Anonymous

            except for the ones that aren't, which won first before they were banned.

    • 4 weeks ago
      Anonymous

      Clearly Volvo must build the best engines in the world with their brick cars

      • 4 weeks ago
        Anonymous

        >he doesn't know about the red block engine

  14. 4 weeks ago
    Anonymous

    A lot of drag comes not from how the air moves over the body of the car, but what the air does after it comes off the back of it. If the air coming off the top of the car and off the bottom of the car take a long time to rejoin, you end up with a pocket of low pressure air behind the car that literally pulls backwards on the car.

    • 4 weeks ago
      Anonymous

      modern aerodynamics. thats literally it

      this
      /thread

  15. 4 weeks ago
    Anonymous

    It means that gm engineers from 30 years ago did their job well.

    Also drag coefficient is just a coefficient, not the absolute drag value of a vehicle. Big teardrop has more drag than a small one.

  16. 4 weeks ago
    Anonymous

    rounded rear end probably has a lot of turbulance and flow trying to stay attatched causing drag, plus whatever grey cuckbox that is probably has a full underbody tray which is huge in reducing drag

  17. 4 weeks ago
    Anonymous

    >same drag coefficient
    Just wanted to make sure you know drag coefficient is measured per crossection area
    The sporty coupe is still more aerodynamic thanks to being smaller

  18. 4 weeks ago
    Anonymous

    You're assuming the drag coefficient on the left isn´t fudged a bit with adjustable suspension, wind tunnel temperature, generous frontal area calculation and other tricks:

    https://www.arenaev.com/wind_tunnel_test_challenges_cybertrucks_official_figures-news-3353.php

    Claimed 0,34 Cd for the cybertruck, real world measurement indicated anything in between 0.382 and 0.535 depending on the setup...

  19. 4 weeks ago
    Anonymous

    One was designed by a computer that gives usable data.
    The other was designed by a guy who eyeballed it.

  20. 4 weeks ago
    Anonymous

    Lots of modern car aerodynamic gains are from how the air is routed under and through the cars

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