The anemometer is an instrument made to measure the wind speed. With just a few tools, it is possible to build one by hand: it is a simple project that even students can carry out to learn different scientific methods and concepts, such as experimentation, data collection, wind speed and other physical quantities. A few simple materials are enough; Read on to learn more.
Steps
Part 1 of 2: Drill the holes in the glasses
Step 1. Drill holes in the glasses
Take four paper or plastic cups that have a capacity of 120ml each. The hole should be about 1.5 cm from the top edge.
Step 2. Make holes in the center glass
Use a drill pliers to make two diametrically opposite holes on the fifth cup, both 1.5 cm from the edge. These must be on the same level. Next, make two more holes 7 mm from the edge, so that they are always diametrically opposite and equidistant from the first two.
Eventually, you will have a central glass with four holes equidistant from each other and close to the top edge
Step 3. Drill a small hole in the base of the center cup
For this you need an awl. Afterwards, you can enlarge the opening with a pair of scissors so that you can insert a pencil in it without jamming it.
Part 2 of 2: Connect the Various Parts of the Anemometer
Step 1. Insert a straw into a glass
You have to pass it through the hole of one of the four single-hole glasses. The straw should stick out about 1.5cm inside the container. Next, bend this end and tape it to the inside of the glass.
Repeat the same procedure with another straw and another glass with only one hole. When finished, you should have two glasses, each with a straw sticking out of one side
Step 2. Insert a straw into the center glass
Take the free end of a straw attached to a glass and pass it through a pair of diametrically opposite holes. When the straw comes out on the other side, put it in another glass that has only one hole. Let the straw penetrate the latter container for about 1.5 cm, bend the end and tape it along the inner wall.
Repeat the same procedure with the second straw
Step 3. Pass the second straw through the middle cup
Insert it so that it goes through the other two diametrically opposite holes in the central container. Next, fit its end into the last glass with a single hole, so that it penetrates 1.5 cm. Fold the end and tape it to the inside of the container.
Make sure the two glasses at the end of each straw are facing opposite directions. When all the containers are connected to the central one, their openings must all be facing clockwise or counterclockwise
Step 4. Insert the pencil into the central cup
Push the end with the grommet into the hole in the base of the bowl until it touches where the straws cross. Now pierce the straws and grommet with a pin to block the intersection.
