I am by no means an expert on this subject, but I do have one idea I would like to throw out there. Would it be feasible to somehow place wind turbines at the top of skyscrappers or any tall buildings far that matter? I know that doubling the altitude of turbines increases wind speed, which would increase energy out. Dosen't make sense to put a turbine on a very tall building?

I was wondering if anyone had instructions with pictures to build this turbine, i need it for my science fair project so i need it to cost under 30$, I only need it to power the small light bulb.
Thanks!

We've had a bunch of wind farms pop up in my area and I was wondering how many homes each turbine could power.
Here's a picture of what I mean:

http://blogs.business2.com/greenwombat/images/2007/07/27/oregon_wind_farm.jpg

Hahaha where I am, it blows almost constantly.

Stick your hand out the window, feel the strong wind flying by your car, why couldnt they install special vents on the front, side and back to funnel that wind into some type of turbine that would create enough party to continually charge batteries

How big must the turbine be?
What average wind speed per month must there be?
How high must the tower be?

http://www.flodesignwindturbine.org/turbine/

Obviously it is still just in testing stages. However, I am curious if this device could be incorporated in non conventional ways (ie. car and/or airplane), especially since it seems that a building in my home town is using a similar design in a skyscraper

http://www.ecogeek.org/content/view/1486/66/

Thanks
Goof
In regards to perpetual motion, it really wasnt what I was thinking at all. So let me ask this for your brains to chew on.

Why is it animals, particularly ones in the sea/lakes have bumps on their surfaces (fins, trunk). Ordinarily I would presume a smooth suface would be aerodynamic, but that is not the case (curse vortices and fluid dynamics). I can think of many cases where adding (disturbances) actually makes products more aerodynamic (golf balls, and that design for a boat that uses two hulls with nothing in the center for example)

On a final note, I am continually disappointed by immediate dismissal of both new and old subjects, its not scientific in the least either.

Discuss!

in other words how big does a turbine have to be to generate how much power?