Geday Mark This is what happened to my battery also when the Kubota regulator failed (refer archives), I think as a result of overreving the dynamo. The Kubota dynamo revs should not exceed 4250. I then used a bigger pulley (about 4 1/2 inch dia) to slow it down and have had no further problems. I imagine the Deere is similiar. Hey, it could be worse.....at least your battery buffered your avionics.
John The Martindale Family 29 Jane Circuit Toormina NSW 2452 Australia ph: 61 2 66 584767 email: johnja...@optusnet.com.au ----- Original Message ----- From: "Mark Jones" <flyk...@wi.rr.com> To: "KRnet" <kr...@mylist.net> Sent: Saturday, October 22, 2005 11:30 PM Subject: Re: KR> battery had bulged > The battery is a Power Sonic > http://www.portablepower.com/items/batteries/SLA/1/Powersonic/PS-12180/PS-12180NB/SL105/35L105S3 > PS-12180NB. This is a UPS (uninteruptable power supply) type battery and is > optimized by a charge rate of 5.4A till it reaches 14.4 to 14.7 volts. Once > fully charged this type of battery must have a charger that either shuts > itself down or goes into a float voltage mode. A float mode for this battery > is a constant charge range of 13.8 to 13.8 volts continuously. When held at > this voltage the battery will seek it's own current level and maintain > itself in a fully charged condition. I am running the John Deere dynamo > system and this system emits a continuous charge rate of 14.5 volts. This > extra voltage can not be tolerated by this UPS battery and I speculate that > it heated the battery up causing the bulging of the side. There is a > possibility, under these circumstances that the battery case could > rupture/explode while in flight which would create unwanted circumstances. I > promoted this as a good Sealed Lead Acid Battery to use in our aircraft. I > have now flight tested this battery and DO NOT recommend it any longer. Mark > Langford, I suggest you remove yours and replace it as well as anyone else > who may have one. > > Mark Jones (N886MJ) > Wales, WI USA > E-mail me at flyk...@wi.rr.com > Visit my KR-2S CorvAIRCRAFT web site at > http://mywebpage.netscape.com/n886mj > > > ----- Original Message ----- > From: "Dan Heath" <da...@alltel.net> > To: <kr...@mylist.net> > Sent: Saturday, October 22, 2005 4:16 AM > Subject: KR> battery had bulged > > > > Mark, > > So, why do you suppose that your battery was Bulged? > > > > See N64KR at http://KRBuilder.org - Then click on the pics > > See you in Mt. Vernon - 2006 - KR Gathering > > There is a time for building and a time for FLYING and the time for > building > > is over. > > Daniel R. Heath - Lexington, SC > > _______________________________________ > > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > > please see other KRnet info at http://www.krnet.org/info.html > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
