I put some tuft a few days ago over the hood. They are very calm, moving by less than a 1/4 inch while there is nobody in front of me. As soon as there is someone then they move much more, up to 1 inch. Following a truck I got a situation I could see them being more or less calm alternatively, may be showing the vertical wave generated by the left side of the truck.
I have also being wondering about some hubcaps being "asymmetrical" when being on the left side or on the right side. May be some could improve the drag on one side while deteriorate it on the other side. With some cars it could be better to push some air under the car while with others it could be better to pull it outside.
Anyway, thanks for the test.
Have fun,
Denis.
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