Cerb wind tunnel, CAD model wanted
Discussion
I'm just reading a book on aerodynamic theory for road vehicles. On the surface the Cerbera looks quite good apart from the rounded door edges. Could probably do with a front air dam and better ducting through the engine bay. Front number plate and original headlights not excellent. In general the frontal area, front screen rake and roof-to-boot tip look OK. The again I don't actually know what I'm talking about.
I did post last week asking if anyone had drag figures, wind tunnel results and any subtle mods.
I now know why the Crebera Speed 12 looks like it does.
It would probably mess the styling and cause the manifolds to glow but I wonder if anyone has tried modifying the bonnet to make a ducted cooling flow like the GT4.
I did post last week asking if anyone had drag figures, wind tunnel results and any subtle mods.
I now know why the Crebera Speed 12 looks like it does.
It would probably mess the styling and cause the manifolds to glow but I wonder if anyone has tried modifying the bonnet to make a ducted cooling flow like the GT4.
your best bet for a cad model of a cerbera is to ask some people on the computer game forums who design cad models for fun (and profit) so that they can add them into games like gt4. I actually was intending on doing exactly what you are intending on doing, but never really got round to it. I was actually given a file for a cerbera for use in a computer game modeler, but I never aquired the software needed to open the file and extract the cad geometry. Once you've done that then importing it into your cfd software should be easy (then you have the fun of trying to mesh it of course!).
If you dont mind paying a bit of money for a ready made model, then you could go to turbosquid.com and buy a cerbera model (though from memory they only have a speed 12 model on their web site).
The other thing i did find was the website of a guy in the UK (pqd developments) whos used cfd to design a new spoiler for the cerbera. I emailed him asking if he'd let me have the cad file, but surprisingly enough he never replied. Interestingly, here's what he said about the spoiler he designed:
"The shots from the CFD software showing the velocity and pressure distributions surrounding the car with the spoiler fitted. Our calculations show the standard car generated a positive lift force at 160mph of 0.183 and the spoiler converts this to a negative force of -0.081 that is a force of 559.98N at this speed."
So, if he's to be trusted, then clearly there's quite a lot that could be done to improve the aero characteristics of the cerbera. No, Peter Wheeler didn't care much for wind tunnels when he signed off the design of the cerb!
If you dont mind paying a bit of money for a ready made model, then you could go to turbosquid.com and buy a cerbera model (though from memory they only have a speed 12 model on their web site).
The other thing i did find was the website of a guy in the UK (pqd developments) whos used cfd to design a new spoiler for the cerbera. I emailed him asking if he'd let me have the cad file, but surprisingly enough he never replied. Interestingly, here's what he said about the spoiler he designed:
"The shots from the CFD software showing the velocity and pressure distributions surrounding the car with the spoiler fitted. Our calculations show the standard car generated a positive lift force at 160mph of 0.183 and the spoiler converts this to a negative force of -0.081 that is a force of 559.98N at this speed."
So, if he's to be trusted, then clearly there's quite a lot that could be done to improve the aero characteristics of the cerbera. No, Peter Wheeler didn't care much for wind tunnels when he signed off the design of the cerb!
Thanks, I have sent a few feelers out in a couple of the 3D forums. Im not really looking for a full manufactures model (dont even think TVR had one), just a dimensionally accurate shell/mesh. Don’t really want to spend a £££££s as it’s just for curiosity more than anything.
If I get anywhere with this ill post and share the findings.
Cheers
If I get anywhere with this ill post and share the findings.
Cheers
A long time ago I wrote a feature about a 3D laser scanner designed to make replica heads. Basically you sat in a chair and the laser spiralled around you head creating a high resolution 3D model. That was 15-years ago, so the technology must be available commercially somewhere. At the time I recall it was operating as a tourist attraction in London. If you had relatively accurate toy model of a Cerbera I don'e see why this could not be user to generate a 3D surface map quickly and at reasonable cost.
brogenville said:
Sure, 3d laser scanners are very much in use today. Obviously they're not cheap, but if you speak nicely to someone at a university with a good fluid dynamics department, you might be able to persuade them to scan a model (toy) cerbera?
Don't do toy scanning whatever you do. Toy manufacturers accent the body lines more, more curvature etc, and they would look silly just blown up, they would look nothing like a real car, I was told this by one of my tutors at uni when I was doing my car design degree, I would never doubt him, he is a legend in his own lifetime!Olly said:
That stuff is brilliant!Gassing Station | Cerbera | Top of Page | What's New | My Stuff