Table of Contents

Abstract

Purpose/Hypothesis

Literature Review

Experimental Design


Materials/
Equipment

Test Station Construction

Observations

Calculations

Results

Statistical Analysis
Conclusions

Discussion
Sources of Error

Applications


Glossary of Terms

Acknowledgements
Bibliography

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Procedure

Note: The manipulation of dependent variables is detailed on the previous experimental design chart. In total, there were 12 rotor variables manipulated, using one, two or three rotors, three sizes of DC motor at medium and high fan speeds. Each variation was tested ten times.

1. The rotor(s) was/were attached to the horizontal axis. The plastic end cap was placed on the end of the axis.
2. A DC motor (1.5-3 V, 9-18 V or 12 V) was coupled to the other end of the axis and the leads of the multimeter attached to the poles of the motor using electrical connectors.
3. The fan speed was set at medium or high and the rpm and wind velocity at the rotor end of the axis were measured using the digital tachometer and anemometer and recorded.
4. Step 3 was repeated a total of ten times.
5. Ten measurements each of mAmps and mVolts were taken using the digital multimeter.
6. If the rotor variation failed to start and continuously turn the DC motor, the rotor variation RPM was equal to zero and testing of that variation stopped.
Caution: The rotating blades could cause serious injury. Care was taken to ensure that body parts, hair and clothing were always kept clear of the moving rotors.

Observations