Just a handful of pics arranged in an order meant to help you see aero features. Several pics are of the dust trailing wakes of the cars I photographed before their runs.
Here is the wake of the streamliner motorcycle featured in the attached pics:
Here is the wake of a roadster:
Here is the wake of the yellow Austin van featured in the attached pics:
All images taken from almost the same distance, give or take a dozen yards or so...