Quote:
Originally Posted by Daox
Also, I have noticed that on a rainy day the back windshield stays completely dry at highway speeds.
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is your rear window more sloped than your other cars
or it there a possibility that the distance of the rear spoiler to the trunk lid is carefully determined like the boundry layer (usually the lenght of both wings combined) as it provides a cushion of air that has allowed many ocean flying, out of fuel, airplanes to "coast" for many miles and make a safe terra firma landing.
perhaps in your case it creates a venturi, creating a low pressure area in front of the spoiler thus allowing air to speed up as it flows down the rear window?