... MIGHT i suggest looking at the old NACA write-ups. Cowlings and nacelles have been found to enhance cooling for radial engines and reduce drag. Of course...
1869
John Alba
ehricus2000
Nov 4, 2008 1:10 pm
My humblest greetings to everyone. My name is John. I am from Singapore and I have been trying to build my own alternator. Unfortunately, a lot of the parts...
1870
Steve Spence
sspence65
Nov 8, 2008 12:50 pm
http://www.fieldlines.com/story/2004/9/20/0406/27488 commercial unit: http://www.hydrogenappliances.com/batteryregulator.html -- Steve Spence ...
1871
Bill Williams
vipond50
Nov 8, 2008 6:08 pm
Thanks Steve for the heads up on this device. I am not quite ready for this yet, but will consider it. Steve one Q though Do  U know how much transient is...
1872
Steve Spence
sspence65
Nov 8, 2008 6:10 pm
When the loads are simple heating devices, I'm not sure there is an issue. Steve Spence http://www.green-trust.org...
1873
capthook2010
Nov 12, 2008 12:29 pm
Preparing to build first axial flux after having built 4 other type alternators will poor performance (cogging, low output etc) Please comment on my planned...
1874
Harold
vwbiofuels
Nov 14, 2008 10:49 pm
The Axial Flux, and any other wind turbine, can create enough electric to cut your electric bill substantially. Why is it that most people stop at ONE? If you...
1875
Harold
vwbiofuels
Nov 14, 2008 10:52 pm
If you consider the higher efficiency, would it be worth going with silver, silver coated copper, gold or gold coated silver to increase efficiency of...
1876
Steve Spence
sspence65
Nov 14, 2008 11:01 pm
Gold makes good contact material, but these units do not have contacts. I don't have gold wire to test, but something tells me it won't generate much of a...
1877
Steve Spence
sspence65
Nov 14, 2008 11:02 pm
The tower costs more than the turbine, but it is good to have at least two, in case one is down for maintenance. I have two solar arrays, two generators, two...
1878
daizolee(yahoo)
daizolee
Nov 15, 2008 3:50 am
1. Did you try to use rectangula (not round shape)Â shape wire wound for increase efficiency of Alternator coils? 2. Did you try to use more stronger...
1879
jerry freedomev
freedomev
Nov 15, 2008 1:33 pm
Hi Harold and All, Silver wire will be more eff and allow you to have more turns if you want but better magnets would cost less, allowing thicker copper of...
1880
Mike Burgess
mike_burgess
Nov 16, 2008 2:12 pm
... Silver is only a slightly better electrical conductor than copper, and it oxidizes faster, requiring better sealing from air. Gold is not a very good...
1881
charlieknox
Nov 18, 2008 4:41 am
This past spring, I built a 24 volt 8 foot axial flux system, exactly to the specs in Hugh Piggotts plans in his book (it works fine). This spring, I'd like...
1882
mickmcconway
Nov 18, 2008 1:25 pm
... I'd highly recommend Hugh's new "A Wind Turbine Recipe Book" which covers just theses points in great detail. Good luck Mick...
1883
Bryan
bryanscoot_2000
Nov 18, 2008 1:27 pm
Hey Charlie other power dose have a book out now. You can buy it on thier website I have the book and it goes in to great detail on every aspect of building...
1884
Dan Fink
danbob88
Nov 18, 2008 9:21 pm
Hi Charlie -- our new book "Homebrew Wind Power" will be shipping Friday. You can get it from the products page on Otherpower.com (it won't go up until the...
1885
hdavis30318
Nov 20, 2008 1:45 pm
How is the best way to test the voltage that is developed on a single coil? I want to test various configurations of coils and magnets but need direction for...
1886
Steve Spence
sspence65
Nov 20, 2008 2:02 pm
wire up your coil pack (3 coils in each series set), and rotate the magnets at the speed you expect. you will need the rectifier wired in if you want to see...
1887
Charlie Knox
charlieknox
Nov 21, 2008 10:19 pm
An oscilloscope will give you the AC results. Some software (freeware) o'scopes hook to a sound card input (voltage divider needed). A DMM might be hard to...
1888
John Bishop
ka3ohh
Nov 22, 2008 4:36 pm
Check out Swiger coils website. They use silver bearing wire for power generation and have about 700 varieties for sale. I'd like to use their wire for my...
1889
rolando elizondo
rolando_eliz...
Nov 22, 2008 4:56 pm
and the way to test the amps?? should we multiply amps-coils? greetings ¡Todo sobre Amor y Sexo! La guía completa para tu vida en Mujer de Hoy. ...
1890
Steve Spence
sspence65
Nov 22, 2008 4:58 pm
I assume it's enameled? I don't see how it's more efficient at capturing a magnetic field. Steve Spence http://www.green-trust.org...
1891
Steve Spence
sspence65
Nov 22, 2008 4:59 pm
Put a load on it. amps is very dependent on the wire size, and the driving force. Steve Spence http://www.green-trust.org...
1892
Steve Spence
sspence65
Nov 22, 2008 5:04 pm
Remember, coils in series add volts, amps stay the same, coils in parallel (phases) add amps. Steve Spence http://www.green-trust.org...
1893
waterleat2000
Nov 23, 2008 7:33 pm
... (freeware) o'scopes hook to a sound card input (voltage divider needed). A DMM might be hard to read, or inaccurate, depending on response time of the...
1894
carltonroylee
Nov 23, 2008 7:39 pm
Are car alternators that are changed over to permanent magnets considered Axial Flux alternators?...
1895
John Bishop
ka3ohh
Nov 23, 2008 7:42 pm
It isn't more efficient at collecting the magnetic field lines but has lower resistance and therefore a lower I squared R loss.  On my generator it would...
1896
Steve Spence
sspence65
Nov 23, 2008 7:43 pm
I had not seen enameled silver wire. It doesn't seem that critical to go to the expense and effort. Steve Spence http://www.green-trust.org...
1897
Kirk McLoren
kirkmcloren
Nov 23, 2008 7:51 pm
saved energy is measured in delivered units/time for example watt hours. Commercially we buy power in kilowatt hours. The difference in efficiency would be...
