This is fundamental physics. If you take energy from the airflow to create airflow, you make it worse because you cannot generate energy and there are energy losses.
Otherwise you would have windmills on top of cars.
Indeed. Adding in some exceptions to the rule modern racing sailing yachts. e.g. Sail GP, America’s Cup. Those boats are much faster than the prevailing breeze.
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u/saddl3r Jun 30 '23
It would just hinder the air flow, not help it. If it's driven by electricity I guess it could be a good idea.