Put another couple of hours in. Getting a little better with the tools.
I appreciate all the comments I've gotten. I had been basing this on the dimensions of the RB6 But I haven't been able to find a top-down picture of the car so I improvised with a Ferrari top view. Unfortunately It fooled me due to the different lengths and wheelbases of the two cars. I've since switched to the Toyota '09 car. This is more of a styling exercise that a technical drawing, though I'm trying to keep it close to the regs.Front wing and wheels are temp items just to give a sense of proportion.
This is done in Blender 3D
http://www.blender3d.org A pretty nice tool that's free. Unfortunately It currently only works with 3 and 4 point polys which makes some shapes harder to get smooth.