Aaron Morris Nick Miller Joseph Yantis Initial Ideas Three gears 4 blades Maximum size for maximum power Magnet spinning between wires to generate power Final Design 2 gears 8 blades All other initial ideas stayed constant Generator Magnets magnetic field spinning in and out of the range of the wire Creates electrical current which flows to the light bulb Windmill and Gear System 2 gears to make the axle with the magnets spin faster Windmill axle connects to larger gear Smaller gear connects to generator Power of the fan P = 0.5 ( p) (A) ( V^3) P=Power p=density of air (1.225kg/m^3) A=area exposed to the wind(area of windmill) V=velocity of air from fan Two different calculations taking into consideration the middle piece of the fan. P(with middle piece)= 37.4 watts P(without middle piece)= 35.9 watts Power of windmill P=(current)(voltage) Current read from meter= 170 milliamps Voltage read from meter= 6.5 volts P= 1.11 watts Efficiency of windmill E=(power of windmill/power of fan) x (100) E(with middle piece)= 3% E(without middle piece)= 3.1% Connecting the magnets to the axle Connecting both axles to the gears 3 rd gear made it difficult to rotate Stability issues when fan was on high setting Lining up the windmill with the gear system 4 th partner still missing The gear system made the magnets spin much faster than expected Final Cost of materials= about $31.00 Our ideas and designs all worked as planned Our windmill generated 170 milliamps and about 6.5 volts on low setting when connected to the meter Overall the windmill worked excellent and actually did better than expected. The bulb lit!! We never ended up hearing from our 4 th group member