2. Methods

2. Methods

2.1 Equipment List


  • Mechanism stand for airfoil (made with basswood, balsa) x1
  • Airfoil (made from wood, carbon fiber and paper to cover) x4
  • Airfoil (made from styrofoam) x4
  • USB fan
  • Lead weights (for mechanism)  (7 grams per weight) x 2
  • Paperclips (for measuring lift in grams): 0.5 grams each
  • Protractor, ruler x1 each
  • Tape x1 roll


2.2 Diagrams of experimental setup  Unknown-8.jpeg
Screen Shot 2017-02-23 at 11.06.57 AM.png
Figure 1: Experimental setup used to measure lift of airfoils






2.3 Procedures
1)To measure degree of lift:
  1. Set up USB fan 10cm away from mechanism. Set the airfoil to mechanism with tape. Counterbalance with 14gm lead weights.
  2. Check that mechanism arm is horizontal, at 180 degrees with ruler.
  3. Switch on USB fan at full power, which is 3m/s.
  4. Wait for 15s, and then measure the angle of the arm.
  5. Recenter arm, and measure another three times.


2)To measure lift force in grams:
  1. Set up USB fan 10cm away from mechanism. Set the airfoil to mechanism with tape. Counterbalance with 14gm lead weights.
  2. Check that mechanism arm is horizontal, at 180 degrees with ruler.
  3. Switch on USB fan at full power, which is 3m/s.
  4. Start with 1gm of paper clips and measure. If arm does not balance at 180 degrees, add 1gm each until arm balances.
  5. Repeat step 2-4 three times.


2.4 Risk Assessment and Management  

While making the airfoils, we may cut ourselves
High
We should wear gloves to protect our hands or be very careful when cutting.
While sanding airfoils, due to material being styrofoam, may inhale toxic fumes.
Low
We should sand in a well-ventilated area.
Handling lead weights may result in long-term side effects.
Medium
Wash hands thoroughly after contact with lead weights.
We may hurt ourselves while handling the sandpaper.
Medium
Sand the materials with care and take care not to sand on hand.
Legend
Low
Medium
High
Unlikely and not severe harm
Likely but not severe OR Unlikely but severe
Likely and severe harm

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