4. Discussion

Our hypothesis is that the deep camber airfoil design would have a higher lift than the low camber and symmetrical airfoils.

From the experiment, results show that the deep camber airfoil design generates more lift than the low camber and symmetrical airfoils as shown in our results page:
http://sst2017-s201-iss-d.blogspot.sg/p/3.html

This is a representation of our results, in the form of a bar graph:

Styrofoam:

















Balsa Wood:

















The key findings are that the Styrofoam and Balsa Wood airfoils have more or less the same findings, just with different statistics. The deep camber airfoil design is ranked 1st for the experiments with both materials.

For evaluation of our hypothesis, the experiment results proved our hypothesis to be accurate, as shown through the bar graph and the results in the link provided above.

Areas for Improvement:
• We experienced communication issues with the construction of the airfoils and mechanism, and what exactly to use. We solved this through a focused discussion, and decided to split our work accordingly and make backup plans should the previous plan fail.
• We experienced problems calculating the lift of the airfoils, as we could not understand the formula very well. We solved this by researching and found a calculator we could understand and use.
• The location of the experiment was not exactly a fair one. We had recorded our findings at different times of the day in the Engineering Lab, styrofoam in the morning and the wood in the afternoon. At the time, the temperature of the aircon, or the aircon fan speed could be different in the afternoon than in the morning, hence the results could have been different.
•Mechanism: The mechanism was fully made out of basswood and balsa, with the moving pivot made out of carbon fiber. The moving arm is slid into the carbon rod, and it creates friction as the moving arm moves up and down. The moving arm would become loose over time and this might affect the experiment.

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