Himlar's race tracks

[Himlar]

Hi everybody,

I'm a new guy here, so I better present myself. My name is Fredrik, and I'm a soon to be product developer and all-round race geek. Recently I started to learn Google SketchUp to have a wider CAD/3D knowledge, and stumbled upon you guys designing your own tracks. What a perfect opportunity to combine work and play, and learn SketchUp by designing race cars and race tracks!

This is my first "real" attempt, trying to design a full-on race arena with some sort of stands and pit lane (although very schematic at the moment). The main track is about 5km long, and I've tried to make something that would be at least a bit challenging for the drivers. Driven clockwise, and no elevation at the moment as I haven't figured out how to create elevated turns. If I can make it work, I think that a slight drop from turn 3 (second right turn) down to T5 (right hander hairpin) would make for interesting brake duels ...

As I have no experience in doing this, 'nor knowledge in track design, I want every critisism and comment that you have. Please don't hesitate, I'm here to learn!