conclusion

Windmill blades

The variables that we tested where number of blades length of the blades the speed of the wind, shape of the blade angle of the blades where made from.
What we learned from this what would make the blade spin the fastest. I learned that what the blade was made from had the largest effect upon the rotating speed witch effect would spin the turbine generator the fastest creating the most amount electricity witch is the goal of our wind turbine. We found that with the number of blades having two blades worked the best in terms of number of blades. I believe this happened because It didn’t weigh it down causing it to spin faster make the generator produce more electricity. The shortest blades worked best when it came down to the size of the blades. I believe that it was for the same reason as the 2 blades worked best. They had little weight. In terms of wind speed high speed worked the best. The blades had surface areas and the wind pushed the surface area and the force made it move. I predicted that that was what was going to happen. I believed that it would be square blades yet it wasn’t it was notched blades. I didn’t look as if it was something that would spin fast yet it was. I have no expiation for this. When it comes to angle 45 degrees was the best apposed to 90 degrees and 0 degrees. 90 degrees I believe this is accurate information because 90 degrees has no angle to turn so it has no particular way to turn. 0 degree has no surface area to the wind so it receives no power. Styrofoam was blades work the best in terms of what it was made from. I believe this happed because it could have a large surface area with out producing a large amount of weight.
The process of this experiment was rather simple. We set up six stations and divided our selves into six groups. We hooked up the blades to a generator that was wired down to an electric current tester. We power the blades with a fan. Read the amount of electricity that it was producing then swapped out the blades for the other kind in that section then we went to the next station and did this again.
The purpose of this experiment was to know how to design our wind turbine blades also if we need this information in a totally unrelated to school event or if we become engineers or wind mill blade designers.
If we where to do this again I would change several things. I would make sure all blades where angled right every time, that the fan is in the same position the whole time and that the fan remains intact the interne time.
What I would have done in forger to make a perfect blade I would make a Styrofoam, rather short, notched with 2 blades at a 45 degree angle with full wind speed.