Return-Path: <13brv3@bellsouth.net> Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 341929 for flyrotary@lancaironline.net; Sun, 01 Aug 2004 18:56:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf20aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040801225551.SXAR1721.imf20aec.mail.bellsouth.net@rd> for ; Sun, 1 Aug 2004 18:55:51 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Battery 101 Date: Sun, 1 Aug 2004 17:55:56 -0500 Message-ID: <026501c4781a$b47de990$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0266_01C477F0.CBA7E190" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0266_01C477F0.CBA7E190 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Here is a question for those on the list that know about the vagaries of = why batteries drain down to 10.2 volts in about 10 days time. This 12v, = 24AH, sealed lead acid battery was new in Oct 03. It has held a charge(except when I leave a switch on) until now. I can not find any closed circuits except for the little electronic compass that draws little. =20 If it just started doing this, either the battery is going bad, or there = is some circuit you don't know about that's draining juice. You should be = able to turn off everything just like normal, then disconnect one of the = leads of the battery, and put a DC ammeter in between the removed lead, and the battery terminal. That will let you read the actual current that's = flowing through your compass, and anything else that might be turned on. The = lower tech method would be to just remove one lead of the battery when you = leave the plane, and check the voltage when you return. If it's still losing voltage that quickly, with nothing connected, it would have to be the battery. =20 How's your charging voltage? If it's too high, you may be boiling off = the liquid, and killing the battery. Should be around 13.5-14.5 V with the engine running. =20 When you do replace the battery, remember the word- Odyssey. VERY = impressed with these batteries. During the 3-4 month Rev-2 upgrade, I never = charged my battery. I also ran the starter and other electrical items along the way. When it came time to actually crank the engine, it was like the battery had a fresh charge. Just amazing. =20 Cheers, Rusty (no comment) =20 =20 ------=_NextPart_000_0266_01C477F0.CBA7E190 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Here is a = question for=20 those on the list that know about the vagaries of why batteries drain = down to=20 10.2 volts in about 10 days time.  This 12v, 24AH, sealed lead acid = battery=20 was new in Oct 03.  It has held a charge(except when I leave a = switch on)=20 until now.  I can not find any closed circuits except for the = little=20 electronic compass that draws little.

 

If it just=20 started doing this, either the battery is going bad, or there is=20 some circuit you don't know about that's draining juice.  You = should=20 be able to turn off everything just like normal, then disconnect = one of the=20 leads of the battery, and put a DC ammeter in between the removed lead, = and the=20 battery terminal.  That will let you read the actual current that's = flowing=20 through your compass, and anything else that might be turned on.  = The lower=20 tech method would be to just remove one lead of the battery when you = leave the=20 plane, and check the voltage when you return.  If it's still losing = voltage=20 that quickly, with nothing connected, it would have to be the=20 battery.

 

How's your = charging=20 voltage?  If it's too high, you may be boiling off the liquid, = and=20 killing the battery.  Should be around 13.5-14.5 V with the = engine=20 running.

 

When you do = replace the=20 battery, remember the word- Odyssey.  VERY impressed with these=20 batteries.  During the 3-4 month Rev-2 upgrade, I never = charged my=20 battery.  I also ran the starter and other electrical items along = the=20 way.  When it came time to actually crank the engine,  it = was=20 like the battery had a fresh charge.   Just=20 amazing.

 

Cheers,

Rusty (no=20 comment)   

 

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