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peteohms
Joined: 31 Oct 2007
Posts: 224
Location: Leander, TX
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 Posted: Thu Mar 26, 2009 6:46 am Post subject: 912 charing problem. |
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Can someone walk me through diagnosing a charging problem? Last week my volt meter was showing a charge between 25% and 50%. A couple days ago I went out to fly around the pattern to see if I could figure out the problem. On the ground it was showing 25% charge but in the air it was down in the red with no charge. What steps do I need to take to determine the cause?
Pete
III/912/Grove
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Pete
Leander, TX
Kitfox III, 912ul, Grove |
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kerrjohna(at)comcast.net
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| Posted: Thu Mar 26, 2009 7:19 am Post subject: 912 charing problem. |
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Not an unusual problem usually requiring the replacement of the voltage regulator. When mine failed it was intermittent, cutting short a trip in the back country of Idaho. I got outa Dodge without delay and had a wingman along side until reaching civilization, relatively, over Hailey. A 30-second conversation with Lockwood got a quick response and a new regulator, not cheap, on the way. No problem since.
John Kerr
Classic IV, 912ul, 875 hours
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Dick Maddux
Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl
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| Posted: Fri Mar 27, 2009 5:50 am Post subject: 912 charing problem. |
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Pete, This probably won't work but it is cheap to try. I was having an overvoltage problem with mine so I removed the voltage regulator and cleaned all the connections. I did have a small amount of corrosion. That did it and it is working fine now.
Also, I think some of the guys are using voltage regulators other than the original Ducatti units. I think they are cheaper and if they work OK I would be interested myself .
Dick Maddux
Fox4
912
Pensacola,Fl
Feeling the pinch at the grocery store? Make dinner for $10 or less.
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peteohms
Joined: 31 Oct 2007
Posts: 224
Location: Leander, TX
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| Posted: Fri Mar 27, 2009 1:12 pm Post subject: 912 charing problem. |
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Can someone please elaborate on "...some of the guys are using voltage regulators other than the original Ducatti units."
Pete
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Pete
Leander, TX
Kitfox III, 912ul, Grove |
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peteohms
Joined: 31 Oct 2007
Posts: 224
Location: Leander, TX
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| Posted: Fri Mar 27, 2009 4:49 pm Post subject: 912 charing problem. |
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My research found some writings by Peter Sherman regarding using Honda Motorcycle rectifier/regulators from the Honda CB250/400 or CX500 in his Ducati mc.
Look here: http://www.geocities.com/750paso/paso/voltageregulator.html
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Pete
Leander, TX
Kitfox III, 912ul, Grove |
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Fox5flyer
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| Posted: Sat Mar 28, 2009 3:13 am Post subject: 912 charing problem. |
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That's a very good option, if you have a source for them. There are other options also, including Aircraft Spruce, but they're pricey. Take a look at the link below. It will help you understand how the system works and my lead to making a good choice. The bottom line is that the stock Ducatti regulators were very troublesome and tended to cause many problems, especially over voltage. One thing that is important with them is that they required a constant load to convert AC to DC. A common replacement was the Key West regulator, but you'll have to search around to find who sells it. Aircraft Spruce used to sell it, but I don't see it now. Might have changed the name. http://www.800-airwolf.com/pdffiles/ARTICLES/Part%2049%20-%204%20page.pdf
Good luck.
Deke Morisse
Mikado Michigan
S5/Subaru/CAP 402+ TT
"The aim of an argument or discussion should not be victory, but progress."
- Joseph Joubert
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