Quote:
Originally Posted by duffremle
I've kind of wondered about the feasibility of a windsock style boattail. Something along the lines of a sea anchor, but fitted to the rear end of the car with just enough of an opening to fill it with air at speed.
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Wouldn't this work like a parachute, sucking energy from the car?
Here's how I see it. To inflate the sock it would have to have at least equal pressure inside than out. This would mean it's got to pull in a lot of air. So, to keep it from deflating or rippling at speed it might add more drag to your car than it actually solves. If you closed off the back and had small intakes at the cant rails like a Ford RS200's air intakes you might be able to keep it inflated. But I still doubt the real-world viability. Venturi intakes, perhaps?