![]() Place another washer and an insulating tape stopper so that it causes as little friction as possible.Fit in the axis, a washer and the wooden ball to act as a bearing.Insert the knitting needle through this hole, it will be the axis.Also make a hole in the strip, on its side 1 cm wide and about 8 cm from the end.Make the same holes and making them coincide in the guide plate so that they coincide with those of the strip.In the 30cm strip, and on its 2cm wide face, make two holes 1cm apart between them and from the edge.Pass the thread between the guide wire and the sheet, tying it to the upper corner of the table.Attach the ping pong ball to a string with strong glue.Link the wire from one screw to another, following the arc of the wood so that it can later be the guide for the anemometer pendulum. ![]() Fasten all of this to the wood veneer with a new nut.Insert into each hole, and in this order: a screw about 2 cm long, two washers suitable for the screw and then two nuts.Poke two holes at each end of the bow, near the edge.Cut the 15 x 15 cm sheet making an arc with a compass, the vertex of the square being the center of the arc.Wooden ball approximately 1.5 cm in diameter.Didactic objective:īuild an anemometer-vane that allows us to verify its main functions and characteristics, as well as its direct applicability in the generation of wind electric power. Hence, the need for students to know and appreciate its usefulness, both for this objective and for the same meteorology and daily use. The anemometer and the vane are used to measure the speed and direction of the wind and connect or stop the wind turbine depending on it, turning and orienting it depending on its direction. ![]() The wind turbine is the machine used to convert the force of the wind into electricity carrying an electronic orientation mechanism that monitors the direction of the wind by means of a vane. Wind turbines have evolved in a few years from a power of 25 kW to 1500 kW and their power is progressively increased. It has been used for more than 2,500 years: navigation sails, grain mills or water pumping, but it began to be used to produce electricity in the 20th century. Wind farms begin to proliferate in every corner. Anemometers are used to measure the wind speed whereas the wind vanes measure the wind direction.Taking advantage of the wind to generate energy is as old as civilization, but in recent years it has been growing the fastest in the world. The wind is having both speed and direction. They also use the anemometer to know about wind speed and pressure. Note: Farmers and sailors are looking at the wind vanes for detecting the wind direction. Early farmers and sailors were looking at wind vanes to detect the wind direction and hence about the weather. When the wind is blowing then the wind vane points into the wind.Īdditional Information: Before the days of round-the-clock, forecasts about the weather were done with the help of wind and its speed and direction. Typically a wind vane is having a pointer in front and fins in the back. These shafts are connected to a magnet and reed switch or the generator. North being marked for the orientation through the compass. Most anemometers consist of 3 or 4 spinning cups mounted on a shaft.Įlectronic wind vanes are having a small magnet bar within it. With the cross having four letters N (north), E (east), S (south), W (west). Mostly these vanes are consisting of an arrow attached to a spindle. A wind vane is important to measure the wind direction.Īn anemometer is important to measure the wind speed.
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