Method-steps

Steps:

We will begin with the preparation.

  1. Take a piece of Styrofoam and cut an aerofoil shape that is exactly 1.5 cm in camber and 15 cm long

  2. Cut another aerofoil shape that is almost the same as the previous except that the camber is .5 cm deeper

  3. Repeat steps 1 and 2 until you have 6 aerofoil shapes

  4. Make a frame to balance the wing, and spring

  5. Build wind tunnel

  6. Put coins on the wings as weights

  7. Screw in an eye to the top of each wing, so that they hang at 11°

  8. Attach the spring balance to one frame, and a hook for a wing on the other

  9. Attach toothpick to bottom of spring, to line up with the ruler’s markings

  10. Calibrate spring with weights

  11. Place fan in the end of the tunnel with diffuser infront

  12. Attach first wing to the spring

  13. Test wind flow using wool strips

The next group of steps is to do the experiment

  1. Note the position of the toothpick

  2. Turn on the fan

  3. Note the highest position of the toothpick

  4. Repeat steps 1-3 until you have done it three times for each wing

  5. Move the eye in each wing slightly forward, so that the wings all hang at 22°

  6. Repeat step 4

  7. Repeat step 5, but put the eyes so the wings hang at 31°

  8. Repeat step 4