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#Post#: 1211--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: January 6, 2014, 2:59 pm
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Genius!
Even though it's balanced now you will still notice some pulsing
of the pole at low wind speeds. This is the pulse of each blade
getting a push at low wind speeds. Once wind picks up you will
see a slight shudder and then the turbine goes to high speed and
smooths out as it gyros.
#Post#: 1214--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: January 7, 2014, 4:01 pm
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I have used a small bolt with washers and a nut. Add washers as
needed. I wouldn't worry too much about top to bottom balance
unless it is really off.
#Post#: 1218--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: January 8, 2014, 9:03 am
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Are you sure the shaft is centered between the blades?
#Post#: 1220--------------------------------------------------
Re: Seagull DIY Discussion
By: nessprojects Date: January 8, 2014, 5:14 pm
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why not use lead, its small but heavy. I use lead flashing for
roofing on my blades to balance them + you can cut the stuff
with scissors. :)
#Post#: 1222--------------------------------------------------
Re: Seagull DIY Discussion
By: nessprojects Date: January 8, 2014, 6:59 pm
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Here in the UK you can still get it by the roll but it is very
expensive.
How about lead fishing weights, could be molten at a push with a
good blow-torch into flat BLOBS on a piece of steel. (Just a
thought).
#Post#: 1231--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: January 13, 2014, 4:09 pm
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Hurray! Thanks for posting and contributing so much to this
project.
Looks good, what rpm, voltage and wind speed?
#Post#: 1234--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: January 14, 2014, 1:59 pm
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With my Seagull it started charging a 12 volt battery when in
the same wind the multimeter would be reporting 7-8 unloaded
volts. So obviously the tops of the spikes do some work when
the meter is taking more of an rms average.
Charging started for me at around 8-9 mph and was about 2 watts
which is about 40% of the power in the wind at that wind speed.
To me this is perfect. As winds start building watts ramp
quickly.
Sorry my data is all past tense. I parted out the alt and just
have the blade and rotor left.
#Post#: 1263--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: January 19, 2014, 2:58 pm
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Well, that is too bad. I know how frustrating that is. I have
probably experienced every failure possible many times over.
That is why I overbuild every bit of these LYNX VAWTs now.
It's not the cold that breaks the line. I have had stainless
steel wire rated for 50Lbs snap. I think there is quite a lot
of micro vibration at the connections, almost a sonic vibration
that fatigues the bends, and then with the stretching forces it
will snap.
Wire will last about 4-6 hours in high winds. I haven't lost a
blade yet with the straps.
#Post#: 1266--------------------------------------------------
Re: Seagull DIY Discussion
By: sut Date: January 19, 2014, 5:39 pm
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Sorry to see this ! I went with steel strapping that came from a
pallet of brick pavers (you should of saw the look the guy had
when I asked for it ), So far it has been doing the job and the
price was right. Today I was running the windmill unloaded
(under a watch full eye) when it got up to 10 volts I figured I
better load it . ;D
I want to get it up higher but have not found a pipe that fits
tightly over the 1"1/2 emt tightly! but will keep looking . The
wings so far have held up great, the next set will be made out
of a little thinner aluminum and minus the wooden blade formers
pieces. I am trying to make them as light as possible but still
strong enough to withstand the force the wind puts on them
#Post#: 1268--------------------------------------------------
Re: Seagull DIY Discussion
By: sut Date: January 19, 2014, 9:00 pm
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No I am looking for a pipe that will fit over the 1"1/2 emt, the
coupling is to short and I don't think it would be long enough
to give the needed support to hold the extra length of emt
without guy wires. I want it to be like a telescoping mast, so I
can raise it to a higher height like yours with out the use of
building a tripod. I just want to raise the windmill an
additional 5' or 6 feet up . The area where I have the windmill
has quite a lot of low brush pretty close to it and I think the
additional height will help it.Right now the windmill can be
spun by hand without standing on anything to reach it .
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