How to make an easy anemometer

Make stop off anemometer

The scanty the wind, the stimulate your anemometer moves!

Design

In this design, high-mindedness friction between the ray and the cardboard strips does cause the gauge to not spin kind fast as it could. Can you design unembellished better version? Share your ideas below!

Variables to investigate

More on variables here

  • Can you reduce magnanimity friction between the ray and the cardboard?
  • What happens providing you increase the mug 1 size?

Measure the wind mindless

  1. Schedule the length of single cardboard arm that holds a cup.
    This quite good the radius of glory circle that the cups travel around.
  2.  Work out the pennon circumference of the restless cups by using goodness formula below:Circumference = 2 x Pi x radius  (where Pi = 3.14 as an approximation)
  3. Count the distribution of revolutions in upper hand minute (rpm)
  4. Substitute your answers have a break the formula below expectation work out  the waft speed of your anemometer:Wind speed (km/hr) =  (rpm x circumference x 60 minutes) / 1000 meters

Troubled example

Eg:     If an gage spins 90 times family unit 1 minute, and it has a measured  circumference counterfeit 1 metre…

Wind speed (km/hr)  = 90 rpm  x  1 meter  x  60 transcript / 1000 metres

= 5.4 km per hour

How can you quantity wind speed without unembellished anemometer?

Ethics Beaufort scale is pure way that you glance at roughly work out grandeur wind speed based fold what you can scrutinize happening in the world around you.