Strive states it well. Notice that he does NOT use Bernoulli's ... "Higher velocity over a surface equals lower pressure on that same surface". I believe his approach is right... But what do I know, I've been working this thing for over 25 years and still haven't got it off the ground. Help! :)
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Blainiac,
Very nice! In your equation, is rho the density of air? Theta is the angle the fins make with the base (or inner diameter of fin connection point), yes? Wait, I see... You're using Bernoulli Navier-Stokes -- That is, you're assuming that the pressure will decrease based upon...