DIY Wind Vaneometer

Toys from trash are amazing! And we couldn’t say that enough. The extent of topics a toy can teach/can be learnt is limited by our imagination. One such example is the Wind anemometer, add a wind vane to it, Vane+Anemometer- Vaneometer!

Things you’ll need:

  • 4 paper cups
  • Foam block
  • Plastic cup with lid
  • Some sand
  • 5 Skewers
  • Plastic Straw
  • Compass


The Science:

An anemometer works on the fact that..wait for iiit..air pushes things. And yet this insanely simple principle is used in ATCs and weather stations to measure wind speed! The faster the wind velocity, the faster will the cups rotate.  And yeah, there are a thousand different ways to build this toy so yeah, go ahead!

We’ve already discussed the fact that air pushes things and faster the wind, higher is the rotation of the anemometer. Now the same principle is applied to a type of wind turbines which generate electricity.

So how do you relate the wind speed to the number of rotations of the anemometer? And that’s when calibration comes to the rescue. In simple words, calibration is setting a device to a set/ reference standard.

So sit back inside a car, take your anemometer out and ask your parents to drive at 10 kmph. Note the number of rotations. Now ask them to drive at 20 kmph and repeat the same experiment. That way when you want to measure wind speed, simple count the number of rotations and compare with the table you’ve made!

Now for the direction, place a compass next to the Vaneometer and mark the North direction on the base-cup. And there you have it, wind speed and direction!

Try finding the wind patterns for a whole year!


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