9:55 am The hotter it goes the faster it spins. Why? Hot air goes up and exits to this bad boy. With this aerodynamic design, no wind velocity is involved but with a temperature differential between the attic space and outside temperature that bad boy WILL SPIN... ... because of the law of Bernoulli. Then let's find out what happens again sometime these afternoon....???
(more)
Link to this comment:
All Comments (0)