The Heavy Blowers
Jensen, Samuel, Torin
Team Information
Our names are Samuel, Jensen, and Torin, and we are the heavy blowers. We are
in the seventh grade and attend Ravenscroft school. We are currently taking the
Middle School Engineering class. The class first started learning about the wind
turbine, then the class learned how to collect data from the wind turbine on the
computer. Finally, the class learned what variables will help the blade spin faster.
Designing wind turbines is important because wind turbines help to save energy,
create less pollution, and we won’t have an unlimited amount of fossil fuels.
Process
1.
2.
3.
4.
5.
6.
We would first start with coming up with new blade design ideas.
Then we drew a template of the blade on a piece of paper, so that we could
trace it on the actual material of the blade.
Then we cut the blades out and hot glued the dowel on the back of them.
We set up all of the wires connecting from the turbine to the computer.
Then would then test the blades, and collect the data(mean power, mean
voltage).
Finally, we would record our data on a sheet of paper.
Constants
● We would keep two constants during the testing.
● Keeping the fan as close as possible
● Keeping the fan on the highest power.
Changes
●
●
●
We changed the pitch of the blade.
The length of the blade from the center of the turbine.
The resistance.
We changed these variables so that we could produce the maximum power of the
wind turbine.
Curve Blade
We chose this blade design because it is curved, looks like a plane blade, and we
thought that it would catch wind better with the curve. We used an oatmeal boxes to
create the curve to the blade. The blade length from the center of the hub to the end of
the blade is 18.3 centimeters.Trail number two did not spin.
Trial
1
2
3
4
Number of
blades
3
3
3
3
Blade pitch
-10
10
-10
-10
resistance
100 Ω
0Ω
7 4Ω
100 Ω
Mean power
910.6 mW
0 mW
971.6 mW
1000 mW
Mean
potential
9.557 V
0V
8.476 V
10.14 V
Wind Catcher
We made the blade to catch air and redirect it into energy. Our inspiration was from our
curve blade. We used an oatmeal to form the curve on the blade. The blade length from
the center of the hub to the end of the blade is 19.05 centimeters.
Trial
1
Number of Blades
3
Blade Pitch
15
Resistance
65 Ω
Mean Power
301 mW
Mean Potential
4.049 V
Airplane Blade
Our inspiration was a airplane blade. I made this blade to be as effective as an airplane
blade by pulling instead of pushing the blade. We made this blade out of cereal boxes.
The blade length from the center of the hub to the end of the blade is 24 centimeters.
Trial
1
Number of Blades
3
Blade Pitch
-15
Resistance
105Ω
Mean Power
96.98mW
Mean Potential
3.18V
Football blade
Our inspiration for this blade was a football. I play football and that is my favorite
sport. We made this blade out of cereal boxes. The blade length from the center of
the hub to the end of the blade is 15.5 centimeters.
Trial
1
Number of Blades
3
Blade Pitch
-10
Resistance
120 Ω
Mean Power
795.9 mW
Mean Potential
9.79 V
Submitted Blade design
We used an oatmeal boxes to create the curve to the blade. The blade length from the
center of the hub to the end of the blade is 18.3 centimeters. We chose this blade,
because it produced the highest mean power.