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#Post#: 3375--------------------------------------------------
US VAWT prototype from 2010
By: lynx wind Date: June 17, 2014, 1:11 pm
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If the Seagull 75 had a 36" diameter it would look just like
this. This US VAWT prototype never made it to market, but it
was a good performer. It had 36" tall NACA 0020 blades just
like the Seagull 75. In this video it touches 42 watts out of
the GTI at about 17-18 mph windspeed. That was momentarily
above Betz limit so there was probably a gust or stored energy
in the GTI capacitors. It only had one spar (1/2" aluminum
tubing) which bent in high winds.
HTML http://www.youtube.com/watch?v=qsZjgxooFXQ&list=PL65B357C2FAB93707&feature=share&index=54
HTML http://www.youtube.com/watch?v=qsZjgxooFXQ&list=PL65B357C2FAB93707&feature=share&index=54
#Post#: 5917--------------------------------------------------
Re: US VAWT prototype from 2010
By: Polypricer Date: April 23, 2015, 12:05 am
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This is rather good for me.
#Post#: 5918--------------------------------------------------
Re: US VAWT prototype from 2010
By: ethan Date: April 23, 2015, 6:12 am
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I dont see wing support struts in the video, are there any?
#Post#: 5919--------------------------------------------------
Re: US VAWT prototype from 2010
By: sut Date: April 23, 2015, 7:58 am
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@ ethan May be that's why the spar bent nothing holding it
#Post#: 5920--------------------------------------------------
Re: US VAWT prototype from 2010
By: lynx wind Date: April 23, 2015, 10:20 am
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Back in the early stages of testing I only used one spar. It
was aluminum. In winds over 20 mph it would bend. Then went to
two spars. At winds over 24 they would bend. Then went to
fiberglass spars. In winds over 24 they would bend and the foam
blades would deform where they met the rotor.
Finally, I added the bracing.
I think SUT's new design may be the simpler and better solution.
Blades held together tip to tip instead of tip to rotor.
#Post#: 5921--------------------------------------------------
Re: US VAWT prototype from 2010
By: ethan Date: April 23, 2015, 11:16 am
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Can we see a picture of the tip to tip?
#Post#: 5922--------------------------------------------------
Re: US VAWT prototype from 2010
By: steve C Date: April 23, 2015, 2:24 pm
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@Lynx
what type of alternator did this turbine use , single phase or
three phase ?
how much more power/torque did this turbine produce by being
3foot diameter instead of the smaller diy75 of 2foot diameter ?
#Post#: 5924--------------------------------------------------
Re: US VAWT prototype from 2010
By: sut Date: April 23, 2015, 5:33 pm
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If you want to see tip to tip look at the 175 I lighten (page
23 post #343) has a ring at top and bottom . Now it doesn't
have to be a ring it could be straight I thought a ring looks
better .
#Post#: 5925--------------------------------------------------
Re: US VAWT prototype from 2010
By: ethan Date: April 23, 2015, 6:00 pm
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Nice. I wonder if just wire rope would work.
#Post#: 6162--------------------------------------------------
Re: US VAWT prototype from 2010
By: Renoxz Date: July 25, 2016, 2:36 am
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