-How do an airplane or wind turbine use air pressure to rotate.
--The wings on an airplpane use air pressure to help the fly the plane, sort of like a bird uses its wings to fly! A wind turbine uses airpressure by the wind turning the blades on the turbine.
-Why was it necessary to twist the rotor blade at an angle.
--It was necessary because if the rotor blade was straight, the wind would hit it straight on. This would make it more difficult to turn the blades.
-Explain how the rotors on the wind turbine & the sail on the sailboats illustrate the same principal.
--On a sailboat, the wind hits the sail at an angle. This is why its possible for a sail to steer a boat. Turbines use this method too.
-Which rotor had the most power and why?
--Our first rotor (the big pink one) worked best. I think this is because the blades were longer, and a bit bigger than our other rotor.
-The maximum output of other wind turbines varied in our class. What was different about the turbine that had the maximum output?
--The difference between Maddy and Kirsten's wind turbine and ours was that there's was smaller, and thinner. Thats why it worked better i think. It was easier for the wind to spin the blades!
Tuesday, April 17, 2012
Wind Turbine
Medium Speed- 6 washers
39.37grams x 9.82 x 1.05 meters = 398.21 j.
398.21/16.6sec = 23.99w
Airplanes and windmills fly and rotate from the wind pushing against the blades of the turbine.
It was necessary to turn the blades at an angle because otherwise the wind has to have a way to get under it and push it which makes it spin. The rotors on a windmill and the sail of a sailboat illustrate the same principle, because they both use wind to move. The sailboat sail is loose so when the wind blows on the sail it goes forward. When the wind blows on the rotors it makes it turn. Our rotor that was made of Card stock paper produced the most energy. Our other one was made of Aluminum foil. The reason why the card stock worked better is because it was bigger, stronger, and curved more. All these properties helped catch the wind more, therefore it spun better. The difference between mine and the one that made the most energy is the design. Mine was big but it was wide. Thiers was long and thin.
39.37grams x 9.82 x 1.05 meters = 398.21 j.
398.21/16.6sec = 23.99w
Airplanes and windmills fly and rotate from the wind pushing against the blades of the turbine.
It was necessary to turn the blades at an angle because otherwise the wind has to have a way to get under it and push it which makes it spin. The rotors on a windmill and the sail of a sailboat illustrate the same principle, because they both use wind to move. The sailboat sail is loose so when the wind blows on the sail it goes forward. When the wind blows on the rotors it makes it turn. Our rotor that was made of Card stock paper produced the most energy. Our other one was made of Aluminum foil. The reason why the card stock worked better is because it was bigger, stronger, and curved more. All these properties helped catch the wind more, therefore it spun better. The difference between mine and the one that made the most energy is the design. Mine was big but it was wide. Thiers was long and thin.
Friday, March 9, 2012
Thursday, March 8, 2012
Drew, Bret, and Tristin's Video
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