EESA09H3 Lecture Notes - Radiosonde, Anemometer, Weather Vane
Document Summary
Wind direction wind vane or weather vane. He linked wind speed to the deflection of a. Leon batista alberti in italy in 1450 horizontal plate. Wind pushed horizontal plate the plate is connected to a spring compression of the spring is proportional to wind speed. Leonardo da vinci created a similar anemometer a few decades later. A century later robert hooke of england created a hooke anemometer. U tube wind blows into tube and pushes liquid in the tube. Wind blows into the tube, and causes liquid to move up and down the tube. The anemometer measures the force of the wind, relative to the force the gravity. James lind in 1774 developed a tube anemometer. What does the pressure anemometer measure?force of wind, relative to force of gravity. Higher wind speed- greater the amount of displaced liquid. The cup anemometer was invented in 1846 by thomas r. robinson of england. It had four cups that were 90 degrees apart.