Quote:
Originally Posted by tomauto
aero benefits...
I don't agree with that statement all that much. When I see anntena flush mounted against new cars, it leads me to think that there was some interference, and VW always had the swirl going up their antenna because it (reduced drag)....i'd say every count of drag is worth something.
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I believe antennaes normally do have a significant amount of drag, if you've ever watched, they'll bend back quite a bit at highspeed. If you try to bend them back with your hand that far you'll notice it's actually quite a large amount of force.
The design of antennes is very inneficient, i don't understand why they don't use a more aerodynamic shape, such as the teardrop. Circles actually have a drag Cd of .5!!
The spiral winding I believe is more designed to get rid of the hispeed whistle noise more than to cut down on drag.