Wind Power C

[ichaelm]

You're not in the International Space Station, are you?

[49ers]

no im in Internal School suspension. ISS. you basically can't do anything.

[2win]

no im in Internal School suspension. ISS. you basically can't do anything.

all for having ur phone out in the AMC... harsh...
http://www.scioly.org/phpBB3/viewtopic. ... 3&start=15

scroll down, try that, but if it's still not loading.... >.<
basically, your blade assembly (on a cd) is connected to the generator and there is a parallel-ly connected resistor also. then the volmeter is connected at the end, and they measure how much electricity you've generated (at the low and high speed of the fan)

[kv1296]

Alright so I just want to make sure we're getting our scoring right. Based on what I could understand, with a low power of .29 volts and a high of .39, our total raw score for part 1 would be 47.24 wouldn't it?

[2win]

Alright so I just want to make sure we're getting our scoring right. Based on what I could understand, with a low power of .29 volts and a high of .39, our total raw score for part 1 would be 47.24 wouldn't it?

Power= (Mean Voltage or whichever speed)^2 / load resistance

Raw score for part 1 = Power for low speed + Power for high speed

[kv1296]

OMG 2win, one of my friends moved from here to Texas and goes to your school, you probably don't know her though.

[ichaelm]

Alright so I just want to make sure we're getting our scoring right. Based on what I could understand, with a low power of .29 volts and a high of .39, our total raw score for part 1 would be 47.24 wouldn't it?

Your low and high powers are not measured in volts. They are in watts. If somehow you got volts then you did the calculation wrong. You're using a resistor right?
However, if you were actually talking about your low and high speed voltages, and you used a resistance of 5 ohms, then yes, that would be your raw score for part 1. In watts.

[eeldj123]

Alright so I just want to make sure we're getting our scoring right. Based on what I could understand, with a low power of .29 volts and a high of .39, our total raw score for part 1 would be 47.24 wouldn't it?

Your low and high powers are not measured in volts. They are in watts. If somehow you got volts then you did the calculation wrong. You're using a resistor right?
However, if you were actually talking about your low and high speed voltages, and you used a resistance of 5 ohms, then yes, that would be your raw score for part 1. In watts.

Or maybe kv1296 is just reading straight off the voltmeter.

[eeldj123]

I apologize for the double post, but I wanted to clarify some more things for the turbine...

What does the 6 cm minimum mean? And is it okay if my blade looks like this?

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O[4.0 cm distance between very front of the blades and back of the motor]
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And the blades form a 21 cm diameter. The rules said something about how the blades can't extend more than 2 cm behind the mounting plane for a radial distance of 3 cm, which is somewhat worded in a confusing manner. So assuming my blades are as straight as a ruler, would it meet the 2cm/3cm rule? Since it seems that it is just there to make sure that the blade doesn't attack the mounting plane.

[Flavorflav]

I apologize for the double post, but I wanted to clarify some more things for the turbine...

What does the 6 cm minimum mean? And is it okay if my blade looks like this?

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O[4.0 cm distance between very front of the blades and back of the motor]
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And the blades form a 21 cm diameter. The rules said something about how the blades can't extend more than 2 cm behind the mounting plane for a radial distance of 3 cm, which is somewhat worded in a confusing manner. So assuming my blades are as straight as a ruler, would it meet the 2cm/3cm rule? Since it seems that it is just there to make sure that the blade doesn't attack the mounting plane.

To paraphrase:

1. Within 3 cm of the axis of rotation (i.e., the axle of the motor), you cannot go behind the CD at all;
2. Over 3 cm from the axis of rotation, you can go up to 2 cm behind the plane of the CD;
3. No part of the blade assembly can extend more than 14 cm from the axis of rotation.

That's it. The 4 cm distance you gave is not meaningful, since the rules don't care about the front of the propeller. If your blades are really as straight as a ruler, though, then the entire thing is in front of the plane of the CD and the only part of the rule that matters to you is the 14 cm maximum radius, which you seem to be within.