Wind Power B/C

[Sasstiel]

I don't really understand how the blade can extend behind the CD, can anyone explain?

[dragonfruit35]

I don't really understand how the blade can extend behind the CD, can anyone explain?

If you attach your blades by cutting slits in them and sliding them on. That's what I did last year! Although I'm pretty sure this year you're not allowed to have anything back there.

[JonB]

Or is it the case that (generally) if a design works well at 5 ohms it also works well at 25 ohms?.

This.

[mkfiddler11]

Or is it the case that (generally) if a design works well at 5 ohms it also works well at 25 ohms?.

This.

Does that mean, the output voltage is same for both setups using 5 and 25 ohms?

[kenniky]

Is there a cheap, fast way to make a reliable test stand setup? Currently we are using a music stand (http://static.musiciansfriend.com/stati ... -15-13.png) with a motor duct-taped onto it, but obviously that is far from optimal as it wobbles quite a bit (If you hold the bottom it's fine but it would be nice to get a stabler one)

Before you ask - yes, I do know of the instructions on the website; however, they are pretty involved. Is there a way I can make a relatively stable setup out of common household materials within about 2 days?

Thanks

[JonB]

Or is it the case that (generally) if a design works well at 5 ohms it also works well at 25 ohms?.

This.

Does that mean, the output voltage is same for both setups using 5 and 25 ohms?

No, I am not sure that would be possible. I was referring to the fact that our turbines that work best with low resistance are also working best with high resistance.

[mkfiddler11]

This.

Does that mean, the output voltage is same for both setups using 5 and 25 ohms?

No, I am not sure that would be possible. I was referring to the fact that our turbines that work best with low resistance are also working best with high resistance.

Thanks for clarifying. I agree with you. Our team's best designs work well regardless of the setup.

[Alex-RCHS]

Thank you for the response, JonB.

[chalker]

Is there a cheap, fast way to make a reliable test stand setup? Currently we are using a music stand (http://static.musiciansfriend.com/stati ... -15-13.png) with a motor duct-taped onto it, but obviously that is far from optimal as it wobbles quite a bit (If you hold the bottom it's fine but it would be nice to get a stabler one)

Before you ask - yes, I do know of the instructions on the website; however, they are pretty involved. Is there a way I can make a relatively stable setup out of common household materials within about 2 days?

Thanks

The suggestions on the website aren't that complicated. A few pieces of PVC pipe you can pick up at any hardware store for relatively cheap, which you just slide together. You should be able to build it in less than an hour, including the time it takes to go to the store to buy the pieces.

[Ionizer]

I don't really understand how the blade can extend behind the CD, can anyone explain?

If you attach your blades by cutting slits in them and sliding them on. That's what I did last year! Although I'm pretty sure this year you're not allowed to have anything back there.

If you are asking how this is possible, some teams last year glued the blades to the back of the cd. They may have also had designs with blades glued on the edge of the cd, or, in theory, they could have also had designs with large bends in the blades. There are probably other ways too, these are just examples. If you are asking whether blades can extend behind the cd or not this year, it is against the rules.