Windtunnel photos of various cars
58 Attachment(s)
A buddy of mine posted this on another forum:
BMW X6 M frontal surface area (A) 2.85m² cw (cd) 0.38 airdragindex (cd x A) 1.07 at 200km/h (125mph) lift front axle 69kg lift rear axle 48kg https://www.miataturbo.net/attachmen...ine=1343223372 Audi R8 V10 5.2 (A) 2.024m² (cd) 0.36 (cd x A) 0.72 at 200km/h lift front 23kg downforce rear 3kg https://www.miataturbo.net/attachmen...ine=1343223372 Mercedes SL 65 AMG Black Series (A) 2.17 m² (cd) 0.37 (cd × A) 0.80 at 200km/h lift front 56kg downforce rear 22kg https://www.miataturbo.net/attachmen...ine=1343223372 Corvette ZR1 (A) 2.059 m² (cd) 0.32 (cd × A) 0.66 at 200km/h lift front 39kg lift rear 14kg https://www.miataturbo.net/attachmen...ine=1343223372 Ford GT (A) 1.92 m² (cd) 0.35 (cd × A) 0.67 at 200km/h downforce front 44kg lift rear 2kg https://www.miataturbo.net/attachmen...ine=1343223372 Mini Cooper S John Cooper Works (A) 2.05 m² (cd) 0.36 (cd × A) 0.73 at 200km/h lift front 17kg lift rear 20kg https://www.miataturbo.net/attachmen...ine=1343223372 Lexus IS-F (A) 2.22 m² (cd) 0.30 (cd × A) 0.67 at 200km/h lift front 31kg lift rear 7kg https://www.miataturbo.net/attachmen...ine=1343223372 Ford Focus RS (A) 2,35 m² (cd) 0,36 (cd × A) 0,86 at 200km/h downforce front 8kg lift rear 4kg https://www.miataturbo.net/attachmen...ine=1343223372 Nissan GT-R (A) 2,30 m² (cd) 0,31 (cd × A) 0,71 at 200km/h lift front 3kg downforce rear 8kg https://www.miataturbo.net/attachmen...ine=1343223372 Porsche GT3 facelift (A) 2.04 m² (cd) 0.32 (cd × A) 0.66 at 200km/h downforce front 15kg downforce rear 19kg https://www.miataturbo.net/attachmen...ine=1343223372 Audi TT-S (A) 2.10 m² (cd) 0.32 (cd × A) 0.68 at 200km/h lift front 42kg lift rear 17kg https://www.miataturbo.net/attachmen...ine=1343223372 Lamborghini Gallardo LP 560-4 (A) 1.93 m² (cd) 0.35 (cd × A) 0.67 at 200km/h downforce front 4kg lift rear 37kg https://www.miataturbo.net/attachmen...ine=1343223372 Alpina B3 Coupe (A): 2.14 m² (cd): 0.29 (cd × A): 0.63 at 200km/h lift front 12kg lift rear 13kg https://www.miataturbo.net/attachmen...ine=1343223372 Aston Martin DBS (A): 2.11 m² (cd): 0.36 (cd × A): 0.76 at 200km/h lift front 11kg lift rear 10kg https://www.miataturbo.net/attachmen...ine=1343223372 Abarth Grande Punto esseesse (A): 2.21 m² (cd): 0.34 (cd × A): 0.75 at 200km/h lift front 26kg lift rear 31kg https://www.miataturbo.net/attachmen...ine=1343223372 Mercedes C 63 AMG (A): 2.18 m² (cd): 0.32 (cd × A): 0.69 at 200km/h lift front 35kg lift rear 42kg https://www.miataturbo.net/attachmen...ine=1343223372 BMW Z4 3.0si Coupé (A): 1.94 m² (cd): 0.33 (cd × A): 0.64 at 200km/h lift front 28kg lift rear 43kg https://www.miataturbo.net/attachmen...ine=1343223372 Lotus Exige S (A): 1.62 m² (cd): 0.44 (cd × A): 0.71 at 200km/h downforce front 5kg downforce rear 24kg https://www.miataturbo.net/attachmen...ine=1343223372 Porsche 997 Carrera S facelift (A): 2.02 m² (cd): 0.29 (cd × A): 0.59 at 200km/h lift front 24kg lift rear 14kg https://www.miataturbo.net/attachmen...ine=1343223372 Ferrari 430 Scuderia (A): 2.02 m² (cd): 0.33 (cd × A): 0.66 at 200km/h lift rear 4kg https://www.miataturbo.net/attachmen...ine=1343223372 Audi S5 (A): 2.18 m² (cd): 0.31 (cd × A): 0.67 at 200km/h lift front 52kg lift rear 34kg https://www.miataturbo.net/attachmen...ine=1343223372 Lamborghini Murcielago LP 640 (A): 2.04 m² (cd): 0.35 (cd × A): 0.71 at 200km/h downforce front 30kg downforce rear 11kg https://www.miataturbo.net/attachmen...ine=1343223372 from a other planet were the Gumpert Apollo numbers.. Gumpert Apollo Sport (A): 1,99 m² (cd): 0,57 (cd × A): 1,14 downforce front 20kg downforce rear 176kg https://www.miataturbo.net/attachmen...ine=1343223372 Honda NSX-R (2002) (A): 1.7800 m² (cd): 0.34 (cd × A): 0.60 at 200km/h downforce front 32kg downforce rear 5kg https://www.miataturbo.net/attachmen...ine=1343223372 Porsche Carrera GT (A): 1.95 m² (cd): 0.37 (cd × A): 0.72 at 200km/h downforce front 49kg downforce rear 40g https://www.miataturbo.net/attachmen...ine=1343223372 Mitubishi Evo VII (A): 2.12 m² (cd): 0.37 (cd × A): 0.79 at 200km/h downforce front 37kg downforce rear 8kg https://www.miataturbo.net/attachmen...ine=1343223372 Pagani Zonda F (A): 2,08 m² (cd): 0,36 (cd × A): 0,74 at 200km/h downforce front 1kg downforce rear 25kg https://www.miataturbo.net/attachmen...ine=1343223372 Koenigsegg CCR (A): 1,86 m² (cd): 0,35 (cd × A): 0,64 at 200km/h downforce front 13kg lift rear 11kg https://www.miataturbo.net/attachmen...ine=1343223372 Porsche 997 Turbo old (A): 2.04 m² (cd): 0.29 (cd × A): 0.59 at 200km/h lift front 9kg downforce rear 12kg https://www.miataturbo.net/attachmen...ine=1343223372 |
No miata?
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No NA miata, no care.
JK. Interesting info there. Obvious why the wife's cooper's rear window is filthy by the time I get to the end of my street. |
Love this. Cool stuff.
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The Gumpert (with its diffuser) is really pretty amazing to see.
I think the one I was most surprised with was the Evo VII (generating downforce front and rear). |
I was surprised at how high the CD was for a lot of the cars, until I realized that they had traded some of that for the downforce they were making. Made sense after I made that connection.
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Gumpert Apollo looks like it does pretty good.
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Carrera GT impressed me. Good numbers, and looks wonderful.
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The NSX-R, a 10-year old car, had really good drag to lift (downforce) ratios.
Some of the newer designs are embarrassing in comparison. Look at the Aston, the Audis TT and S5. Lots of drag and lots of lift at both ends. Styled by the stylists and not by the wind. :giggle: |
I wish I knew how to look at the smoke and tell what was good and what was bad.
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I've always though a little more downforce in the front vs rear or less front lift than rear was better. Keep the front end down thinking. Wish I had a better sense for reading the airflow too. I liked the Mucielago pic. Seemed like a good set of numbers (read I have no idea what is good) Little bit of downforce and not too draggy?
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18 Attachment(s)
There was apparently more in the original SportAuto info:
Originally Posted by Georg Because at the GT-R datasheet discussion at factory claimed cd of 0.27 and sportauto clocked 0.31 on one of the most modern windtunnels in the world I thought it would be interesting to compare the sportauto results to manufacturer claims.. Important... not cd is important.. the airdragindex is the important number... the combination of cd and the size of the vehicle.. the lower cd x A the better is the aerodynamic of a car... a other sidenote... many "noseheavy" cars can become nearly weightbalance neutral at higher speeds if the lift at the front axle is greater than it is at the rear Mercedes SLR (A): 2.07 m² (cd): 0.37 (cd × A): 0.77 at 200km/h downforce front 19kg downforce rear 35kg https://www.miataturbo.net/attachmen...ine=1343238602 Maserati Coupé Cambiocorsa (A): 2.016 m² (cd): 0.34 (cd × A): 0.68 at 200km/h downforce front 55kg downforce rear 45kg https://www.miataturbo.net/attachmen...ine=1343238602 Ferrari 575 M Maranello (A): 2.09 m² (cd): 0.32 (cd × A): 0.66 at 200km/h lift front 61kg lift rear 40kg https://www.miataturbo.net/attachmen...ine=1343238602 Porsche 996 GT3 RS (A): 1.94 m² (cd): 0.30 (cd × A): 0.58 at 200km/h lift front 19kg downforce rear 26kg https://www.miataturbo.net/attachmen...ine=1343238602 Ferrari Challenge Stradale (A): 2.0 m² (cd): 0.31 (cd × A): 0.62 at 200km/h downforce front 10kg lift rear 21kg https://www.miataturbo.net/attachmen...ine=1343238602 Mercedes CLK DTM AMG (A): 2.15 m² (cd): 0.34 (cd × A): 0.73 at 200km/h lift front 37kg downforce rear 12kg https://www.miataturbo.net/attachmen...ine=1343238602 Mercedes SL 65 AMG (A): 2.1 m² (cd): 0.31 (cd × A): 0.65 at 200km/h lift front 29kg lift rear 33kg https://www.miataturbo.net/attachmen...ine=1343238602 Mercedes SLK 55 AMG (A): 1.95 m² (cw): 0.32 (cw × A): 0.625 at 200km/h lift front 23kg lift rear 31kg https://www.miataturbo.net/attachmen...ine=1343238602 Corvette C6 Coupe (A): 2.0 m² (cd): 0.29 (cd × A): 0.59 at 200km/h lift front 54kg lift rear 28kg https://www.miataturbo.net/attachmen...ine=1343238602 Lotus Exige (Mk I) (A) 1,631 m² (cd) 0.43 (cd x A) 0.70 at 200km/h downforce front 20kg downforce rear 58kg https://www.miataturbo.net/attachmen...ine=1343238602 no windtunnel picture online Opel Speedster Turbo (A): 1.61 m² (cd): 0.38 (cd × A): 0.61 at 200km/h downforce front 23kg lift rear 19kg https://www.miataturbo.net/attachmen...ine=1343238602 no windtunnel pitcure online Ferrari 599 GTB Fiorano (A): 2.23 m² (cd): 0.33 (cd × A): 0.73 at 200km/h lift front 41kg lift rear 24 kg https://www.miataturbo.net/attachmen...ine=1343238602 BMW e92 M3 (A): 2.17 m² (cd): 0.33 (cd × A): 0.71 at 200km/h lift front 10kg lift rear 23kg https://www.miataturbo.net/attachmen...ine=1343238602 Corvette C6 Z06 (A): 2.1 m² (cd): 0.308 (cd × A): 0.647 at 200km/h lift front 49kg lift rear 22kg https://www.miataturbo.net/attachmen...ine=1343238602 Opel Corsa OPC (A): 2.15 m² (cd): 0.36 (cd × A): 0.78 at 200km/h downforce front 23kg lift rear 22kg https://www.miataturbo.net/attachmen...ine=1343238602 no windtunnel picture online Ferarri F430 (A): 2.04 m² (cd): 0.34 (cd × A): 0.70 at 200km/h lift front 11kg lift rear 6kg https://www.miataturbo.net/attachmen...ine=1343238602 RUF RT12 (A): 2.04 m² (cd): 0.33 (cd × A): 0.67 at 200km/h lift front 11kg downforce rear 34kg https://www.miataturbo.net/attachmen...ine=1343238602 Honda Civic Type R (A): 1.93 m² (cd): 0.326 (cd × A): 0.63 at 200km/h downforce front 19kg lift rear 44kg https://www.miataturbo.net/attachmen...ine=1343238602 |
Originally Posted by TorqueZombie
(Post 907903)
I've always though a little more downforce in the front vs rear or less front lift than rear was better. Keep the front end down thinking. Wish I had a better sense for reading the airflow too. I liked the Mucielago pic. Seemed like a good set of numbers (read I have no idea what is good) Little bit of downforce and not too draggy?
If you understand the effects, you can work with anything. I think the traditional thinking (even in some higher levels of racing) is to try for some downforce bias that is slightly rearward of neutral (based on the weight bias of the car). In that way, the car has similar handling bias at different speeds, but if the lift/downforce bias starts skewing things, it skews them towards understeer at higher speed, rather than towards oversteer. This makes sense to me because at higher speeds, there is insufficient torque to bias the handling with the throttle. |
^Makes some sense. I'm sure when I get further in my degree it will make more sense. This gives me something to think about and makes me want my own wind tunnel.
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