1. Windmill Michael Culley Chris Hensel Olivia Juneau Logan Taylor

2. Team Picture

3. Introduction Goal To generate enough energy to light a 75-watt light bulb. -To design a clean and safe operating windmill with the approximate dimensions of.5mx.5mx.8m -Windmill must will be operated with out human interaction once started. Materials House hold items Cooper/ Tin wire (1500ft) Cardboard box Brass rods ( 12 inches ) Hot glue Styrofoam Canada Dry Cans ( bc Olivia is Canadian)

4. Picture of finished product

5. Mech. Intro The Fan: The Gears, Shaft, and Washers: Generator:

6. How it works In electromagnetic generator s they don’t pull electricity from nothing. It uses the mechanical energy from the moving magnets and then converts it to electrical energy. It does this by electromagnetic induction Which is the reverse conversion of electrical energy into mechanical energy is done by a motor. i.e. car motors A generator forces electrical charges to move through an external electrical circuit, The electricity is already in the wire the magnets just move it http://en.wikipedia.org/wiki/Elec trical_generator http://www.physics.uiowa.edu/adventure/fall_2005/oct_15-05/light_bulb.jpg Electrical Intro:

7. Calculations Equations KE =  1 / 2 ρ(L*A)v 2 P(calculated) = 1 / 2 ρAv 3 Actual P = IV Efficiency = η η =[(Actual)/(Calculated)] * 100 Symbols V = Voltage P = Power(watts) I = Current(Amps) Rho (ρ )= density of air T = time A = Area L = Length v = wind velocity

8. (1/2)*(1.2 kg / m 3 )*( AREA m 2 )(????) 3 P = W η = actual power / calculated power η = actual power / calculated power P = IV P = IV I = current R = resistance

9. Summary As the project states we have build a windmill. With a number of people moving to a green world wind power is becoming very big. Windmills use wind to rotate a fan and that fan then produces electricity via electromagnetic generator. Windmills use wind to rotate a fan and that fan then produces electricity via electromagnetic generator. The generator functions as described before. http://www.flatrock.org.nz/topics/environment/assets/energy_windmills_copenhagen2.jpg

10. Conclusion Construction Issues and Design Fails -Original wire was not long enough -box was too small to house both gears and generator -gears required too much force to spin the propeller -Too much insulation for the magnets to transfer electrical current to the wire Time Management -We started designing our windmill right off the bat. -We met as a group about 3 times, and worked individually on some parts too. -We spent about $20 on the materials. - Logan and I went to buy the materials. We all contributed the the building, and PowerPoint.