What are the basic element in wind energy conversion device?

I have to build a wind energy conversion device for my design subject. However, I can’t use toothed gears, gearboxes, energy storage systems (e.g. flywheels, batteries, pressurised fluids, etc), rolling
element bearings and existing (pre-made) fan impellers.

So I need rough ideas on what are the things that can replace those items which can make the device moving.

how many wind turbines to power the US?

im doing a project for school and i am trying to figure out the most efficient but least expensive way to power the US on alternative energy. Please i need to know the cost and how many wind turbines it would take!

Is there a way to build some kind of alt energy source for my home with household materials?

I don’t know how hard it is to build solar panels or something that could actually be used to help as an alternatvie energy source for my home? Any ideas??

How to set up a wind power system in the home?

Hi yahoo answers tell me the procedure for setting up the power system in the home..