Traditionally kids fly their kites on a windy day.Â This anemometer craft will give you another option the next time some blustery weather hits your area.Â An anemometer is a tool used by meteorologists to measure wind speed. Because a power drill is needed, youâ€™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 12â€ long
- 3/16â€ Dowels
- Egg carton
- Acrylic or poster paint (optional)
- Power drill
- Coping saw
- Hole punch, 1/8â€
- First prepare your cups by cutting 4 egg holders out.Â Then shape them a bit so they look like a 4-petalled flower. Â Â You can paint them if you like.Â 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.Â Hold the spool in place lengthwise using a workbench.Â Drill a hole through in the middle using a 3/16â€ drill bit.Â Check to see if the dowel fits.Â If not, drill a bit more to make the hole wider.Â Remove the spool, make a quarter turn and secure it back into the workbench.Â Drill another hole through the spool.Â Sand down any wood splinters.
- Next, switch the drill bit to Â¼â€.Â Cut the cork in half and secure into workbench.Â Drill a hole through the middle.Â Set aside.
- Use a coping saw to cut the 3/16â€ dowels into four 5â€ long pieces.
- Set the spool on a flat surface and place the Â¼â€ dowel through the top hole.Â Add glue to the four drilled holes and place a 3/16â€ dowel into each making sure they donâ€™t touch the middle Â¼â€ dowel.Â Â Allow to dry.
- Next, punch a hole in two of the petals of each cup to feed the dowels through.Â You may need to use a pencil to gradually make the holes bigger.Â 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 Â¼â€ dowel. Then set the spool on.Â Attach a cup onto each 3/16â€ dowel and make sure theyâ€™re all facing the same direction.Â
On a windy day set your anemometer in the ground or a flower pot.Â Make a chart and take note of how many rotations your anemometer makes in a 30 seconds.Â Compare the results to other days.Â Or just have fun watching the cups spin.Â Isn’t it mesmerizing?
If this craft was a bit advanced or you just donâ€™t have access to a drill, then please stop by again for our next post.Â Weâ€™ll share instructions on how to make a basic version of the anemometer.
See you soon!