Wind Power C

[illusionist]

WHAT?!?! 4.2 V without the resistor? Wow, that's pretty awesome! Wire it so that one 10 ohm resistor connects the positive and negative leads form the motor, and another resistor is below the first one, also connecting the positive and negative leads. It should look something like an "H" with two things in the middle instead of one.

[2win]

WHAT?!?! 4.2 V without the resistor? Wow, that's pretty awesome! Wire it so that one 10 ohm resistor connects the positive and negative leads form the motor, and another resistor is below the first one, also connecting the positive and negative leads. It should look something like an "H" with two things in the middle instead of one.

Haha, thanks x) OHHHHHHH, I NEED TWO OF THEM >.< hehe.... alrighty, THANK YOU SO MUCH I LOVE YOU!!!!!!! (NO HOMO, if youre a girl, NOT IN THAT SENSE, if youre a guy)

I'll post my results tomorrow, lol... *sigh*

[illusionist]

Hahah, I'm a guy. But yeah, according to I believe Ohm's Law (or some other equation), two 10 ohm resistors in parallel will result in 5 ohms of resistance. Two 15 ohm resistors in parallel will result in 7.5 ohms of resistance.

[eeldj123]

You want a very minuscule angle on the outside, because it has to spin faster, this will eliminate drag, but a higher pitch on the inside.

Yes, though the point I was trying to make with the little story is that the building section of this event is more empirical (;

And 4.2 is pretty crazy, even if it's a combined voltage.

[2win]

haha, i may have read it wrong XD Okay, well, if the voltmeter is set on Volts and the dial is a the number 2 (not 20): http://www.scienceshareware.com/images/ ... tmeter.jpg

Then how much is that??

Also... how much detail/info should i need for my binder? i mean, i have pretty basic summaries for everything, details on how they work...

[Frogger4907]

Basic information isn't enough.

[illusionist]

FOR SURE. My partner and I died during our states test. It was like 8 questions or something, hardest test ever.

[eeldj123]

Basic information isn't enough.

Whenever "basic information" is mentioned in the event description, expect it to be more than just "basic information".

[Frogger4907]

Exactly.

[obstinator]

hey guys i was wondering, if you have a turbine that takes a while to start up, would they take the average starting from when the fan is
first turned on? or would they allow the turbine to get going before taking the average?

thanks

[Frogger4907]

During your set up time, u can ask them to turn the fan on, which will allow it to start spinning, once it reaches top speed ask them to begin recording.

[OptimusPrime]

Does anyone know what the winning blade score from nats were?

[Paradox21]

Does anyone know what the winning blade score from nats were?

As you know, the scores change highly depending on the setup, so the number is meaningless unless you competed at nationals. I did ask the high speed fan guy what the top score was (I went in the last time slot). He said the top score (high speed fan only) was about a 550 max, 500 average. It was a 2-blade design. I didn't ask the low speed guy what the top score was. Our fan had a 350 average on high (I actually don't remember the low score) and it got us a tidy 15th place.

The test at nationals was VERY easy, so the rankings should correlate very tightly with fan blade performance.

[illusionist]

I wish it was like that for me at States. I'm not really a Study event guy, so the test was hard, but our blade did beastly. Unfortunately, it was a 12-or-so question test, which is weighted as half our score...

[BVSOrcguy]

i wanna know how the heck you got 4.2v without a resistor! our highest ever without a resistor was 1.7v. our three blade this year did 450 on high in testing on a 8(?) ohm resistor. we got first at states. although i was at sumo bots during wind power(why are they always at the same time?! ), my partner said the test was hard, but we had the fastest turbine.

next year, we have some ideas that involve either lexan or fiberglass.