![]() The Beaufort scale is a way that you can roughly work out the wind speed based on what you can see happening in the environment around you. = 5.4 km per hour How can you measure wind speed without an anemometer? Wind speed (km/hr) = 90 rpm x 1 meter x 60 minutes / 1000 metres Check how fast the wind is blowing with this simple activity.Create the anemometer and have fun observing and thinking like a scientistMusic. Substitute your answers into the formula below to work out the wind speed of your anemometer:Wind speed (km/hr) = (rpm x circumference x 60 minutes) / 1000 metersĮg: If an anemometer spins 90 times in 1 minute, and it has a measured circumference of 1 metre… Anemometer used to easily determine wind speed Made of corrosion-resistant materials for outdoor use Red cup helps with rotation count Includes activity.An anemometer looks like a weather vane, but instead of measuring which direction the wind is blowing with pointers, it. They can come in many forms, some of which are easy to make yourself, like a wind sock. The speed of that wind can be measured using a tool called an anemometer. Use tape to secure the cups in position as shown on the photo. To measure the speed of wind, you need a device called an Anemometer. Count the number of revolutions in one minute (rpm) Take one of the cut sticks and push each end through both sides of a cup.Work out the circle circumference of the travelling cups by using the formula below:Circumference = 2 x Pi x radius (where Pi = 3.14 as an approximation). ![]() This is the radius of the circle that the cups travel around.
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