Traditionally kids fly their kites on a windy day. This anemometer craft will give you another option the next time some blustery weather hits your area. An anemometer is a tool used by meteorologists to measure wind speed. Because a power drill is needed, you’ll need to get a grownup to help you out.
Supplies & Tools:
- Wooden spool
- Dowel, 1 thick enough to spin freely in spool and at least 12” long
- 3/16” Dowels
- Egg carton
- Acrylic or poster paint (optional)
- Power drill
- Coping saw
- Hole punch, 1/8”
- First prepare your cups by cutting 4 egg holders out. Then shape them a bit so they look like a 4-petalled flower. You can paint them if you like. Tip: If you paint one of the holders a different color from the others, then it will make counting the rotations a lot easier.
- While your paint is drying, ask a grownup to fire up their power drill. Hold the spool in place lengthwise using a workbench. Drill a hole through in the middle using a 3/16” drill bit. Check to see if the dowel fits. If not, drill a bit more to make the hole wider. Remove the spool, make a quarter turn and secure it back into the workbench. Drill another hole through the spool. Sand down any wood splinters.
- Next, switch the drill bit to ¼”. Cut the cork in half and secure into workbench. Drill a hole through the middle. Set aside.
- Use a coping saw to cut the 3/16” dowels into four 5” long pieces.
- Set the spool on a flat surface and place the ¼” dowel through the top hole. Add glue to the four drilled holes and place a 3/16” dowel into each making sure they don’t touch the middle ¼” dowel. Allow to dry.
- Next, punch a hole in two of the petals of each cup to feed the dowels through. You may need to use a pencil to gradually make the holes bigger. You want the holes to be snug not loose for the dowel.
- Finally, put together your anemometer by placing the cork and washer on the ¼” dowel. Then set the spool on. Attach a cup onto each 3/16” dowel and make sure they’re all facing the same direction.
On a windy day set your anemometer in the ground or a flower pot. Make a chart and take note of how many rotations your anemometer makes in a 30 seconds. Compare the results to other days. Or just have fun watching the cups spin. Isn't it mesmerizing?
We were not experiencing much wind this day so I had to create some with a fan.
If this craft was a bit advanced or you just don’t have access to a drill, then please stop by again for our next post. We’ll share instructions on how to make a basic version of the anemometer.
See you soon!