Quote:
Originally Posted by freebeard
............. or any ducted fan.
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I hear what you are saying, looks like a divergent duct.
model aircraft: THE RELATIONS BETWEEN PRESSURE, VOLUME AND TEMPERATURE
The Porsche 959 wing may be similar, notice the angle of the top plane and inner plane.
https://www.stuttcars.com/porsche-models/959/
I've always assumed that there was no attached flow on the back window, and that the wing actually served to fill out the aero-template similar to a Bonneville style spoiler.
This would explain the top side of the wing angle which if a normal wing the angle of attack is that of lift, not down force.
An oddity, when a wing isn't a wing but a plane for re-pressurization or semi-attachment at trailing edge.