1. Team Volunteers Matt Rhule Tony Carr Kevin Black David Young

2. Overview We used plexiglass for the frame. We used 4 magnets inside the frame wrapped with magnetic wire on the outside. We attached the fan to the metal rod and stuck it through the frame.

3. Mechanical and Electrical Aspects Mechanical – The wind hits the fan and causes the blade to spin. – The fan then turns the rod that the magnets are attached to. Electrical – As the magnets spin, a magnetic field creates a current. – The current then runs through the wire which is connected to the light bulb to turn it on.

4. Calculated Efficiency η (Efficiency in %)= (Actual Power / Theoretical Power) * 100 Theoretical Power = Power of fan = ½ρAv³ = ½( 1.204 kg/m³)(.0113 m²)( 6.7056 m/s)³ = 2.0511 watts Actual Power = Power of generator = IV = (0.18 amps)(3.6 volts) = 0.648 watts (0.648 watts)/(2.0511 watts) * 100 = 31.593% Efficiency

5. Construction/Design Issues The original design failed to produce a current, probably due to faulty magnets or wiring. The original casing hindered easy development and wasn’t stable. In both designs, the blade is a little heavy, causing friction and less power generated.

6. Conclusion Despite having to redesign the windmill, the project was successful, correctly lighting up a light bulb. Worked well in a group and learned about current, electricity, and basic generator design.