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BushWhacker
Junior Member
Canada
255 Posts |
 Posted - 06/03/2008 : 05:50:41
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Sundowner;
What I come up with (rounded off) is 2750/24=114.6 rpm per volt X 13=1490 rpm before you get any usable charge based on a 12 volt system. Of that I feel quite confident. I'm guessing you would see just over 60 watts at that speed.
If you are cranking near 1500 RPM and do not have an affiliation with NASA, their machine shop, and composite materials manufacturing division, I really don't think I would like to be around that turbine while it is making usable power. I hate the thought of blade bits going through my body.
With respect, there are far better gen units available. The key to selection on a DC unit is RPM/voltage X 13=? if you are looking to charge a 12 volt system. The lower the RPM needed to generate 13 volts the better. If you are using a HAWT 300 or less rpm is a good target. If you are using a VAWT 120 RPM will do but under 100 RPM is the good stuff.
Don't worry, we were all there at one time not knowing what to look for. It's a learning curve and I doubt anyone knows it all. I certainly don't and will never pretend to.
Good luck in your quest for cheap power,
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
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Sundowner
Starting Member
Ireland
47 Posts |
Posted - 06/03/2008 : 07:16:47
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Thanks BushWhacker, it is as I suspected from all the reading I've done on here.
This little motor would have to spin too fast to be productive. I could always look at using gears but I think that would get complicated.
I think I hear a drawing board calling me.
Sundowner....huh.........thats what they call us.......Sundowners |
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BushWhacker
Junior Member
Canada
255 Posts |
Posted - 07/03/2008 : 04:18:00
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I don't recall who, but someone on this board has had reasonable results using a drum VAWT and bicycle sprockets and chain to gear up. The 1500 RPM bit still scares me though. That's pretty darn busy.
I wish you luck!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
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Advice and help needed
