Physical Science Lab

[iYOA]

thank you both for your help. We can finnaly start now!!!

One more thing though. Did anyone have to shape their wings to catch a good current or did you just make a flat wing. If so how did you shape it?

we made them flat and that got us a pretty good voltage, 150 watts for low and 250 for high. the fan was one foot away from the base though

[haven chuck]

First of all, you should make sure that it is a meter because i found that certain models can't pick up low speed wind from a meter away.

[iYOA]

and does a very low blade angle, make it hard to pick up low speed winds a meter away?

[haven chuck]

I don't know, but i think it has o do with anersia. Once it gets going, it doesn't matter, but it is hard to get up to a normal speed with the low speed. I think the lighter you can make the windmill, the less of a problem the low speed will be.

[iYOA]

i found that if we make ,the part of the blades farther away from the center, fatter and the other end thinner in relation to that, it gives us the best ammount of voltage, now we are at 320 on high and 205 on low.

[A Tang]

wow, no new posts since last year...

why is box fan recommended? just wondering why...


first year on this event

[haven chuck]

A box fan is propbaly recomended first off so there is more consistensy between competitions. Also, it propbaly gives more equal air everywhere.

[erinwhalen]

we took a cd motor from a tape/cd player and are having trouble finding the wires. what is the easiest way to get a cd motor that works well for the assembly?

[haven chuck]

We took our motor from a portable cd player and we just took everthing part under we had just the motor, then left just a red and black frayed wires (i think). we then just hooked them up to a voltometer. I wasn't involved too much in this part so i don't know that many more details.

[lunchb-0x]

Does the curve, tilt, and spacing on the turbin make a signifant difference on the voltage?