<div>Fully charged 4S lipo will be over 16v. Has anyone tried a 4S A123 pack? That would be 14v or less.</div> <div> </div> <div>Bob R.</div> <div><BR><BR><B><I>JShulman <jshulman@cfl.rr.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">I had the same thing happen to mine with a 4S set-up. The first warning sign was the starter had gotten really hot. The second, and<BR>final sign, was the starter locked-up. I think it's a combination of the higher voltage and, for me, the longer time running it<BR>trying to start the motor (setting and fine tuning), maybe.<BR><BR>Regards,<BR>Jason<BR>www.jasonshulman.com<BR>www.shulmanaviation.com<BR>www.composite-arf.com<BR><BR>-----Original Message-----<BR>From: nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org]On Behalf Of<BR>adriancwong@earthlink.net<BR>Sent: Friday, August 22, 2008 3:26 AM<BR>To:
NSRCA-discussion@lists.nsrca.org<BR>Subject: [NSRCA-discussion] Kavan starter with Li-Po battery<BR><BR><BR>To all,<BR><BR>I have been using a Kavan starter with a 10 cell, 12V, 2.2A ni-cd pack for many years with good results. However, ever since the<BR>1400DZ came out, it required more cranking power from the starter and one charge would normally only last for two weekends of<BR>flying. By the time the 160Z came along, I've switched to a 12 cell, 14.4V, 2.2A ni-cd. Again, it performs flawlessly. However, as<BR>you are aware, the 12 cell pack is really heavy.<BR><BR>At the beginning of this year, I have switched to two li-po packs - 2 cell, 7.4V, 2100 mAh with 15C continuous, 20C burst on each<BR>pack. The first starter lasted for 6 months until it stopped working after normal wear and tear. The second one stopped working -<BR>frozen solid - after about 2 months - I could tell this one had some strange noise to began with, like something was rubbing inside.<BR>Therefore,
I wasn't surprise that it stopped working only after two months.<BR><BR>The third starter I rigged up was relatively new, and has been working perfectly, until this afternoon. After the first flight, it<BR>was frozen solid again. Like the second starter, it didn't give any warning sign whatsoever - slowing down, getting hot on either<BR>the starter or the battery.<BR><BR>My question:-<BR><BR>1) Am I using the wrong battery pack?<BR><BR>2) Too high of a discharge rate because it's a li-po instead of ni-cd?<BR><BR>3) Once the starter is frozen, is there a way to fix it? Sure hate to keep tossing away starters.<BR><BR><BR>Any advice or suggestion from you electric gurus are greatly appreciated.<BR><BR>Thanks in advance,<BR><BR>Adrian<BR><BR><BR>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>No virus found in this incoming message.<BR>Checked by
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