How To Make An Anemometer (Medium Level)

How To Make An Anemometer (Medium Level)


Materials:

• Straight Pin
• Stapler
• Tape
• Straws x2
• 3oz Plastic Cups x4
• Small, Long Wooden Stick (About 1cm wide and 20 cm tall)
• Strong String
• Scissors
• Timer
• Color Marker
• Ruler
• Electrical Fan (For testing. Optional)
• Thick Heavy Cardboard
• Tape
• Carpenter Glue

Procedure:


1. Cross the straws so they make a perfect "X".


2. Staple the middle of the straws together twice.


3. Now cut the all the cups in half.


4. Pick out the bottom part of the cups you just cutted.  Color ONLY one cup in with your color marker.


5. Poke a hole that the straw could just fit on the SIDES of the cup. (One hole per cup)


6. Insert the straws in the holes you just made in the cups. (Make sure the straws doesn't stick out of the cups)


7. Tape the straw and the hole on the cup together.


8. Pin the middle of the straws (where you just stapled) onto the stick.


9. Pull the pin up just a little bit so there is space between the straws and the stick.


10. Now put carpenter glue on the bottom of the stick (Not the side you just pinned on), then place it on the thick heavy cardboard.  Hold and press it for 5 minutes (hold the middle of the stick).


11. Draw a straight line on the cardboard with your ruler and color marker.


12. Cut 4 strings.


13. Tape one end to the stick and the other on the cardboard, make sure they are tight, if it's loose, it will not work.  Repeat with the other strings.


14. Get your timer and electrical fan ready.  If you don't have a electrical fan, use the wind outside.


15. Move the cup that you COLORED in step 4 so it lines up with the line you just drew on the cardboard.


16. Start timing, record how many times the colored cup went through the line on the cardboard in 1 minute.  That's your result.


17. Now if you want to put it outside, it will be totally water-proof and you can measure the wind speed everyday!




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