I have done some overlayes conserning my roof chopping and this is bothering me this is correct overlay and its way off:
If I put it about 250-300mm too toward the front it layes perfectly:
So the guestion follows:
If you put the template too much in front of the picture is still layes perfectly ok to the shape. So can I do the same in my lupo and still get nice flow. My own estimation is that when you are at the max roof camber you can make that first few degrees pretty rapidly like those pictures prove or what do you think?
This may be true only if you begin the cambering at the max camber point etc?
third option:
Now template aligned at car underside lowest level and its quite nice match on the roof. Note that sidesills are lower than the cars underside, because its better aerodynamically that way.
Plan is to begin the rood chopping this weekend so would like to get some feedback. My own estimation is that the xl1 roof camber is streamlined in wind tunnel and there is attached flow...
On the 2009 vw L1 model the roofline is according to the template so VW has finded somenthing after that...