Nice video... but what's the point of it? did they show any numbers? did they show that the props were even doing anything other then spining? how big of a prop ('fan") are you thinking? because... stollen from
otherpower.com
wind velocity is in meters per second If we work the formula for a 5-foot diameter turbine in a 10 mph wind:
5 feet = 1.524 m swept area = pi * r2 = 1.8241m2 wind Speed = 10 mph = 4.4704 m/s So
Power available (Watts) = ½ * 1.23 * 1.8241 * 4.47043
=
100.22 Watts
and just to run the ECU on my car is 80 watts, of course I drive alot of highway miles and according to the time log built in to my under hood tac, I've averaged about 37mpg, but others average much lower and you can fingure that anything at less then about 10mph is worthless.