Testing on the pole

This is the 3rd part of testing my VAWT, this time on the pole. Power was not impressive, but I think that may be the fault of my alternator which has a huge air gap and high resistance coils.

Category:

Science & Technology

Tags:

• wind
• turbine
• VAWT
• free
• power
• science
• engineering
• alternator
• NACA0020
• NACA
• lift
• Danarious

[rikkiesix]

Hi, is your generator a axial flux one?

What wire and how many rounds did you use if so.

And how stong are your magnets?

By the way, great progress. Keep it up

Greetings

Erik

[sjh7132]

@rikkiesix

Yes, axial flux, but I didn't do a good job on it. My stator is very warpped because I didn't clamp it down when I poured it. I will do better next time. I got the magnets from the windstuffnow site. When I build an alt that works well, I'll post the specs. This one is not worth duplicating.

[sjh7132]

@rikkiesix

Hey Eric, since you were asking about the alt, I thought I'd let you know I teamed up with a guy named LymxSteam on youtube and we created the ultimate alternator. You can see if in the USVAWT channel.  (The new name we call ourselves)

[emagnets]

i like it. true.

The mass (weight) does help the rotation. light blades need the rpm.

not bad dude.

i wish i had the open land/space. I live in a valley full of trees.

great works.

sam

[sjh7132]

@emagnets

Sam are you still working on your left type VAWT? I have to say, when something with a 5 ft diameter is spinning above your head at 200 RPM, it's SCARY! I'm just glade mine is Styrofoam and light aluminum. If it was wood I think I would have ran for cover.

[Caleb6543]

Congratulation! That's a big turbine for such a small pole. That may be an advantage of lift type blades ... not much area for side loading.  Did I hear right that the blades drop out of warp; could be a good new technical term. :-) Based on your results, I think I want to try augmenting my Savonius turbine with some lifting blades at say 3x the diameter.

[sjh7132]

@Caleb6543

Yes, I'm a Trekie. I was thinking that a lenz inner VAWT with some outboard lift blades that were match properly could be a killer combination.

[Zypkin]

Very nice. Bravo :)

since U are just testing and U dont generate much power, you could try reducing the diameter of the turbine and get some more speed (and voltage).

...and maybe get a serious pole??? :)))

[itsandbits1]

from what I can see of your airfoil I think it is a high performance blade and needs a lot more wind but opening up the angle of attack might give it a little more at the lower wind speed. try maybe 3-5 degrees out and if that doesn't work try in. I think you need to get up in the air with alot more structure on the blade mounts and pole. keep it up though cause the never stops. It just goes somewhere else when u need it

[sjh7132]

@itsandbits1

The AOA is 0 degrees. (mounted at the 40% point of the wing.).  I'd guess the wind was about 15 mph. TSR was about 2.3.