<div>I would try the new A123 cells (nano-phosphate) for this. Not quite as light as Lipo, but they can be abused without damage, charge quicker, and 4S will add up to between 13 and 14v fully charged.</div> <div> </div> <div>Bob R.</div> <div><BR><BR><B><I>Dwayne Brown <dwaynenancy@suddenlink.net></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">What makes me want any Lithium battery is I don't have to charge it the<BR>night before if I've charged it last week. Dwayne<BR><BR>-----Original Message-----<BR>From: nsrca-discussion-bounces@lists.nsrca.org<BR>[mailto:nsrca-discussion-bounces@lists.nsrca.org] On Behalf Of<BR>adriancwong@earthlink.net<BR>Sent: Friday, August 22, 2008 3:56 PM<BR>To: General pattern discussion; nsrca-discussion@lists.nsrca.org<BR>Subject: Re: [NSRCA-discussion] Kavan starter with Li-Po battery<BR><BR>What drove me to li-po in the first place was the
lighter weight<BR><BR>-----Original Message-----<BR>>From: Bob Kane <GETTERFLASH@YAHOO.COM><BR>>Sent: Aug 22, 2008 4:49 PM<BR>>To: nsrca-discussion@lists.nsrca.org<BR>>Subject: Re: [NSRCA-discussion] Kavan starter with Li-Po battery<BR>><BR>>FWIW, my 10 cell sub-C nicad powered Kavan started has no trouble starting<BR>up to 170DZ engines.<BR>><BR>>Bob Kane<BR>>getterflash@yahoo.com<BR>><BR>><BR>><BR>>----- Original Message ----<BR>>From: "adriancwong@earthlink.net" <ADRIANCWONG@EARTHLINK.NET><BR>>To: General pattern discussion <NSRCA-DISCUSSION@LISTS.NSRCA.ORG>; General<BR>pattern discussion <NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>>Sent: Friday, August 22, 2008 4:41:57 PM<BR>>Subject: Re: [NSRCA-discussion] Kavan starter with Li-Po battery<BR>><BR>>Thanks to all the advice, I'll try a 3S 11.1V, 2100 mAh pack. Hopefully, it<BR>will have enough cranking power.<BR>><BR>>Adrian<BR>><BR>>-----Original
Message-----<BR>>>From: Ed Alt <ED_ALT@HOTMAIL.COM><BR>>>Sent: Aug 22, 2008 1:54 PM<BR>>>To: jpavlick@idseng.com, General pattern discussion<BR><NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>>>Subject: Re: [NSRCA-discussion] Kavan starter with Li-Po battery<BR>>><BR>>> I'm using a 6S2100 LiPo setup with my HD Sullivan. The starter is rated<BR>at 12-24V and it handles the voltage just fine. I've also run it 4S2100 and<BR>it's more than adequate.<BR>>><BR>>>Ed<BR>>> ----- Original Message ----- <BR>>> From: John Pavlick <BR>>> To: General pattern discussion <BR>>> Sent: Friday, August 22, 2008 12:39 PM<BR>>> Subject: Re: [NSRCA-discussion] Kavan starter with Li-Po battery<BR>>><BR>>><BR>>> Ken,<BR>>> THAT is the secret Ken. Good batteries are capable of delivering a<BR>higher voltage under a high current loading. If the starter is designed to<BR>run on 12V you're pushing your luck
with anything much over 14V. That's why<BR>things are breaking. A GOOD 3S pack should be more than adequate.<BR>>><BR>>> John Pavlick<BR>>><BR>>> Ken Velez <KVELEZ@COMCAST.NET>wrote:<BR>>> I have a question about all this. I see people using 2S 7.4 @ 8.4V<BR>charged and a 4S @ 16.8 V charged. I'm using a 1950 mAh 3S Extreme V2 on<BR>mine and although I'm flying Pattern electric mostly I still have other glow<BR>set ups including a YS 1.60 and my starter has no issues starting any of<BR>this and while using the 3S doesn't give you any advantage as power increase<BR>compeered to the 14.4 Ni-Cad packs available the Li-Po's hold a higher<BR>voltage under load without stressing the motor and components. Just my<BR>thoughts.<BR>>><BR>>> Ken<BR>>> ----- Original Message ----- <BR>>> From: Robert Richards <BR>>> To: General pattern discussion <BR>>> Sent: Friday, August 22, 2008 11:31 AM<BR>>> Subject: Re:
[NSRCA-discussion] Kavan starter with Li-Po battery<BR>>><BR>>><BR>>> Fully charged 4S lipo will be over 16v. Has anyone tried a 4S A123<BR>pack? That would be 14v or less.<BR>>><BR>>> Bob R.<BR>>><BR>>><BR>>> JShulman <JSHULMAN@CFL.RR.COM>wrote:<BR>>> I had the same thing happen to mine with a 4S set-up. The first<BR>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<BR>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<BR>[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<BR>pack for many years with good results. However, ever since the<BR>>> 1400DZ came out, it required more cranking power from the starter<BR>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<BR>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<BR>- 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<BR>working after normal wear and tear. The second one stopped working -<BR>>> frozen solid - after about 2 months - I could tell this one had<BR>some strange noise to began with, like something was rubbing inside.<BR>>> Therefore, I wasn't surprise that it stopped working only after<BR>two months.<BR>>><BR>>> The third starter I rigged up was relatively new, and has been<BR>working perfectly, until this afternoon. After the first flight, it<BR>>> was frozen solid again. Like the second starter, it didn't give<BR>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<BR>ni-cd?<BR>>><BR>>> 3) Once the starter is frozen, is there a way to fix it? Sure hate<BR>to keep tossing away
starters.<BR>>><BR>>><BR>>> Any advice or suggestion from you electric gurus are greatly<BR>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 AVG.<BR>>> Version: 7.5.524 / Virus Database: 270.6.6/1625 - Release Date:<BR>8/21/2008 6:04 AM<BR>>><BR>>> No virus found in this outgoing message.<BR>>> Checked by AVG.<BR>>> Version: 7.5.524 / Virus Database: 270.6.6/1627 - Release Date:<BR>8/22/2008 6:48 AM<BR>>><BR>>><BR>>> _______________________________________________<BR>>> NSRCA-discussion mailing list<BR>>> NSRCA-discussion@lists.nsrca.org<BR>>>
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