Step 1: Materials
2. Can opener
6. Yakult / Vitagen drinking straw
Step 2: Step 1
Step 3: Step 2
Step 4: Step 3
Step 5: Step 4
For each fold, bend the strip slightly in the same direction so as to create an angle of attack for the propeller blades relative to the airflow.
The propeller pitch will affect the windmill performance. Generally, fine pitch will work well in low wind condition, while coarse pitch allows the windmill to spin faster when the wind is strong.
Step 6: Step 5
Attach the windmill to any stick or stable structure and place it facing into or away from the wind direction.