Effects of Skyer spoiler for coupe?

[The HACK]

Wanted to share this. I didn't take a picture of it but it was definitely interesting.

At the track event this weekend, it was cold enough in the morning for dew to form all over the top of the car. We left early enough for me to drive on the i5 freeway North at speed where the aerodynamics played an interesting role in the "shape" of the air around the dew.

At slightly above freeway speeds, the dew on the rear of the window wasn't moving in a specific section. See attached diagram. Red parts on the rear windshield indicate what I can see, toward the bottom of the windshield between the cut-out, air was not moving at all. There appear to be a pocket of high pressure air that prevented the dew from clumping up and washing off. On each side the effect petered off, closer to the edge of the hatch window the dew flew off quicker, as well as the top edge.

I've driven at cold climates where there's dew in the morning, and I remember the dew would clump and fly off at highway speeds relatively quickly. After about 15 minutes of driving to the track, most of the dew in the solid red section remained as I pulled in to the paddock.

The spoiler is doing something for sure. I'd like to open it up for discussion amongst some of our more knowledgeable members here to see if that pocket of unmoving air means the air is being kicked up and separated above the rear hatch window quicker, and what that effect means for downforce.

Discuss.

[Ryan13]

Maybe this will help in the discussion.