Abstract

Purpose/Hypothesis

Literature Review

Experimental Design

Materials/
Equipment

Test Station Construction

Observations

Calculations

Results

Statistical Analysis
Conclusions

Discussion
Sources of Error

Applications
Phase 2

Glossary of Terms

Acknowledgements
Bibliography

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Procedure

Note: The manipulation of dependent variables is detailed on Table 1. In total, there were 42 variables manipulated, using one or two rotors, of the same or different sizes, at varying fan speeds and different positions on the same horizontal axis. 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. The fan speed was set at low (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.

3. Step 2 was repeated a total of ten times.

4. One end of the fishing line was taped to the end of the axis and the other was attached to the snap swivel that was connected to the weigh scale.

5. The rotor(s) was/were allowed to rotate and the fishing line was guided as it wound around the axis. When the fishing line became taut and the axis stopped rotating, the weigh scale measurement in Newtons was recorded.

6. The fishing line was unwound and step 5 was repeated at total of ten times.

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