Madison Koonce's windmill questions

1) It was necesary for the blade to be at an angle, because if they were straight on, the wind would just blow and the blades wouldn't catch the wind and use that energy to push the next blade around.
2)Roatrs on a windmill and the sail on a sailboat both work with the bernelli's principal. When you have air pushing towards your object from a farther distance you will have more energy to move the sailboat or the turbine.
3)Our ruler windmill had the most power.
4)Limitations on this model could have been that the rulers had holes in them, allowing the air to go past the blades. We later taped the holes so we could keep adding weights.
5)The difference between the maximum out put and others were that we didnt follow the pinwheel model, our blades were at an angle, and we took the bennelli principal into consideration when posistioning our fan.
6)Airplanes and windmills both use air pressure, when the wind (kinetic energy) turns the blades which turns into mechanical.

Number of Washers	Mass	Time in seconds	Height (meters)
17	122.26	15	.86
18	128.45	15	.86
19	155.66	21	.86
20	143.0	30	.86
21	150.4	18	.86
22	157.8	17	.86
10	69.07	29	.86
16	114.89	14	.86