Quote:
Originally Posted by JacobLeSann
Actually, the rear wing recommendation led me to Progress Auto’s 205MPH Civic.
It’s pretty much my car, with a lot of aero work and engine tuning, etc. Wonder if it could be a good reference.
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If you want to open a hornet's nest, get a copy of the book, ' Modifying the AERODYNAMICS of Your Road Car, by Julian Edgar, and look at Chapter 7, page 186.
*the text discusses SAE Paper 2011-01-0175, having to do with the 2010 Audi A7 Sportback ( fastback ).
* this car has rear body flow separation, including the entire backlight, which increases both drag and rear lift.
* Audi's solution is to add a deployable rear pocket spoiler, which reaches 72.5 mm upwards to the 'template' contour to cancel the separation-induced lift, then reaches a bit further ( 30 cm ) to add 'direct downforce.'
* the 2018 Audi A7 spoiler only goes as high as the 'template.' And it's Cd 0.26, vs Cd 0.28 for the 2010 model.
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When weather permits, you might construct a cardboard and duct tape rear wing for testing, and see if the performance gain ( if there is any ) justifies the trouble to fabricate a durable version.
The Tesla X, dual-position, active rear spoiler was quietly discontinued when it was found that snow and ice would build up below the 'wing', then cause problems when it attempted to lower, and stow itself back inside the hatch.
