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Misc. / Re: VAWT inspired aircraft
« Last post by CG on October 17, 2021, 09:11:38 am »
Also like all vawts the rotors are highly likely to fail because the construction is not as strong as the traditional hawt type.
Also isn't there a torque effect somewhere that needs to be compensated for?

Maybe they should be classified as hawt/axial and vawt/radial. But maybe I need more coffee.🤯
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Misc. / Re: VAWT inspired aircraft
« Last post by CG on October 16, 2021, 07:35:44 am »
90 % of the weight is in the turbine. It's a good experiment, but that's all
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Misc. / VAWT inspired aircraft
« Last post by Caleb on October 16, 2021, 06:42:30 am »
I doubt this will ever be practical, but someone has got some money to develop an aircraft based off VAWT technology.  :-)

https://www.youtube.com/watch?v=96DKtu9DFow
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by CG on October 09, 2021, 10:37:35 am »
Got the replacement order. charged them up and they didn't have a shelf life over 24 hours.
Returning them.
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by CG on October 05, 2021, 10:19:14 am »
Tried one on the Joule thief led circuit. Lasted 40 hours.
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by CG on October 04, 2021, 01:41:23 pm »
One of the 4 cells is dead and won't charge, returning them.
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by CG on October 04, 2021, 10:43:38 am »
He doesn't need the float switch, just a ground level 55 gallon drum. Then you recycle the water.
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by Caleb on October 04, 2021, 09:34:39 am »
Now you have me thinking about small hydro storage again.  ;D
Here is a guy's system that uses a 55 gal drum on his roof.  He fills it using a solar panel and has a custom Pelton wheel driven generator to light an LED.  The amount of energy stored is about the same as a AA battery.  Your light could go for a long time on one drum of water.  Maybe you could fill a bag of water, pull it up into a tree and get some light for an entire evening.

https://www.youtube.com/watch?v=CMR9z9Xr8GM
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by Caleb on October 03, 2021, 07:13:11 pm »
Pretty fancy chip!
They are advertised to provide a steady 1.5V output, so I think you are right that they regulate it down.  The mAhr rating is quite low, so the actual battery is probably fairly small.  I wonder if you can charge it with a 6V solar panel or if that would be too high a voltage.
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Battery / Re: Rechargeable 1.5 volt lithium AAA cells
« Last post by CG on October 03, 2021, 06:08:31 pm »
Received, charged and now testing on the Joule thief.The cells built-in circuit protects against over and under voltage. Just wondering about the "Lithium"claim since all the lithium I know that is rechargeable is 3.7 volts not 1.5 volts.
Maybe it really is 3.7 volts, but the output is regulated down to 1.5 volts to fit this form factor.
https://www.dropbox.com/s/05gfhdpbj9jgwiv/20211003_181655_temp.jpg?dl=0
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