This has to be one of the coolest threads I have ever seen - So very very interesting in so many ways.
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No 'physical' wind tunnel here, you asked. That virtual wind tunnel/CFD data (results) was exported into spreadsheets then called back into a totally separate structural analisys. That cfd data can be re-used for e.g. excitations or forced displacements if you prefer. Post structural analisys is meant at solving mostly displacement, force and strains/stress problems on the car componets. So... set evironment; gravity, humidity, temp, and you can predict the behaviour of lets say; your suspension's preload/compression, damping, the force generated on any brackets, your mirrors' mouting points... stuff like that. You can also predict response dynamics (modal) such as vibrations onto body panels (accoustics) and some other more adv nonlinear problems eg. elasticity, buckling, laminates/ply; how much is my 5mm thick cheap fiberglass front bumper is bending at 200miles an hour (seriously lol). All started from a 180km/hrs beaten up air fluid data mapped node-by-nodes onto a Boxster car! My training folder is now at 30+ gigabytes of raw *.dat text files bud ;) Learning the fun way! Chk back in two years... I'll be the official 986Forum Formula 1 Team Aerodymics - adviser ;) |
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If you are a licensed pilot, would you consider taking me for a ride on a rented G-102/103 at Warner Springs? I live in OC and could do a nice drive down Highway 79 and perhaps having lunch afterwards at Ramona? Regards, Gilles PS: Sorry for hacking this great tread, just could not resist |
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The Sport Classic is the only 996 or 997 with a duck tail – on other cars it wasn’t even an option. As far as I can tell, the closest equivalents to the 997.2 Sport Classic are the 997.2 C4 GTS and the 997.2 C4S with the X51 powerkit. All three are wide bodies, and will have larger air intakes in the front bumper than normal Carreras. (The next closest match is the 997.2 C4S without the powerkit, though not sure if the bumper, radiators, etc. are the same.) The C4 GTS has a Cd of 0.30, versus the Sport Classic’s 0.32. It’s easy to blame the duck tail, but it could also be the double bubble roof or the aftermarket looking side skirts. And I’m not sure the bumper is the same either. It would be very interesting to see what your software shows about both drag (where the difference is) and lift. By the way, the GTS was available with and without a GT3 style wing (which was probably an option on C4Ss as well). Comparing eiher version to the Sport Classic would be hugely interesting. And if you will be modelling enough cars to do all three rear ends (normal, duck tailed, and winged), then you’d have all the rear aero answers! Anyway, much though I’d love to see the aero analysis of my car, as you’ve probably guessed, I’d give my vote to the Sport Classic. And I’m betting I’m not the only 996 (or 997) owner who would do the same. |
I guess I´m not the only one who isn´t too pleased with the visuals of the original wing. From a visual standpoint I think this one is the best I´ve seen (my personal preference): http://pictures.topspeed.com/IMG/crop/201012/first-generation-por-4_1600x0w.jpg
Even if I still would like to modify it, I think it has the right thing going for it. Anyway, since I´d except the Porsche guys to have made their homework I´d hesitate to make any changes without some fluid-dynamic calculations to back it up. Great to see this initiative from Nine8Six, I´m hoping for some more conclusions regarding the rear wing vs aftermarket stuff.. My dream product would actually be a carbon fibre rear hatch with included (good looking) wing with a mechanical raise-function like the one on the Turbo.. Unfortunately I don´t think I have the ability to produce it myself, at least not the time.. Again all credits to Nine8Six, lifting the forum to another level :cheers: |
This thread is awesome! Would it be possible to make those drawings with "humps" on?
interested to see if they provide any aerodynamics changes. |
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