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Low voltage

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loboloda(at)execulink.com
Guest

Posted: Mon Sep 20, 2010 10:50 am Post subject: Low voltage

Coming back to home base yesterday I noticed voltage was indicated at  

11.5 rather than the usual 14.

The ammeter was showing a slight discharge with the strobes on.

Readings were not affected by engine RPM.

I'd made a couple of stops along the way and had no trouble re-starting.



I'm hoping that this is nothing more than an indication that my 6  

year old Odyssey battery has suffered a partial failure.

As always suggestions on probable cause from those who have been  

there would be appreciated.



Dave C-FBZI

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paul.the.aviator(at)gmail
Guest

Posted: Mon Sep 20, 2010 11:50 am Post subject: Low voltage

Hi Dave,



I would start with a discharge test on your battery.  Stores like Batteries Plus do this as a free service.



Paul

  [quote][b]

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Rocketman

Joined: 07 Sep 2010
Posts: 87
Location: USA, Earth

Posted: Mon Sep 20, 2010 2:12 pm Post subject: Low voltage

Dave,



First thing I'd check is that big old 30 amp fuse, then go to the 

battery.  If that don't get it, check the regulator...



Jeff - Baby Blue



On 9/20/2010 1:50 PM, david miller wrote:

 	  Quote: 	
		   



 Coming back to home base yesterday I noticed voltage was indicated at

 11.5 rather than the usual 14.

 The ammeter was showing a slight discharge with the strobes on.

 Readings were not affected by engine RPM.

 I'd made a couple of stops along the way and had no trouble re-starting.



 I'm hoping that this is nothing more than an indication that my 6 year

 old Odyssey battery has suffered a partial failure.

 As always suggestions on probable cause from those who have been there

 would be appreciated.



 Dave C-FBZI

 Checked by AVG - www.avg.com

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rehn(at)rockisland.com
Guest

Posted: Mon Sep 20, 2010 2:37 pm Post subject: Low voltage

Dave

The Odyssey battery is likely what kept you going, I would suspect the regulator/rectifier. Mine went out and it sounds very similar to what you experienced. I also have the Odyssey it's like the energizer bunny! The battery would be the relative cheap fix so maybe?

Jerry



Sent from my iPad



On Sep 20, 2010, at 11:50 AM, david miller <loboloda(at)execulink.com> wrote:



 	  Quote: 	
		   

 

 Coming back to home base yesterday I noticed voltage was indicated at 11.5 rather than the usual 14.

 The ammeter was showing a slight discharge with the strobes on.

 Readings were not affected by engine RPM.

 I'd made a couple of stops along the way and had no trouble re-starting.

 

 I'm hoping that this is nothing more than an indication that my 6 year old Odyssey battery has suffered a partial failure.

 As always suggestions on probable cause from those who have been there would be appreciated.

 

 Dave C-FBZI

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frankm(at)clara.net
Guest

Posted: Wed Sep 22, 2010 1:59 am Post subject: Low voltage

Dave

  

 There is a piece in the Safety Spot in Septembers  Light Aviation about the same problem (though the answer may not be the  same).  Go to http://www.lightaircraftassociation.co.uk/2010/Magazine/2010/Sep/Safety.pdf and  look at the Himax article.  In that case the problem was neither the  battery nor the regulator/rectifier.

  

 Frank

   [quote][b]

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loboloda(at)execulink.com
Guest

Posted: Wed Sep 22, 2010 12:42 pm Post subject: Low voltage

Thanks Frank,

So many causes of electrical problems !

I charged my battery today, went to about 13V, but then as I held the voltmeter on the reading slowly 

began to decrease, working it's way down to the previously indicated 11.6V

I'm presuming this is a battery in need of replacement.



Dave 

On 22-Sep-10, at 5:27 AM, Frank Mycroft wrote:

[quote]  Dave

  

 There is a piece in the Safety Spot in Septembers Light Aviation about the same problem (though the answer may not be the same).  Go to http://www.lightaircraftassociation.co.uk/2010/Magazine/2010/Sep/Safety.pdf and look at the Himax article.  In that case the problem was neither the battery nor the regulator/rectifier.

  

 Frank

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