Quote:
Originally Posted by M_a_t_t
What were you trying to do with the ones on your insight? Was the main goal just for something to mount the rear wing to?
|
The first version of fins was to provide better straight line stability by moving the lateral centre of pressure backwards. The fins also mounted the wing (that kept the fins upright).
The second version supports the fins by a steel frame behind the car and uses a spoiler instead of a wing. When throttle-stop testing this version I found lower drag with the fins, and the fins and spoiler, in place. My guess is that the fins are disrupting the trailing vortices off the pillars.
