<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt">FWIW, my 10 cell sub-C nicad powered Kavan started has no trouble starting up to 170DZ engines.<br><br>Bob Kane<br>getterflash@yahoo.com<div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">----- Original Message ----<br>From: "adriancwong@earthlink.net" <adriancwong@earthlink.net><br>To: General pattern discussion <nsrca-discussion@lists.nsrca.org>; General 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 will have enough cranking power.<br><br>Adrian<br><br>-----Original Message-----<br>>From: Ed Alt <<a ymailto="mailto:ed_alt@hotmail.com" href="mailto:ed_alt@hotmail.com">ed_alt@hotmail.com</a>><br>>Sent: Aug 22, 2008 1:54 PM<br>>To: <a ymailto="mailto:jpavlick@idseng.com" href="mailto:jpavlick@idseng.com">jpavlick@idseng.com</a>, General pattern discussion <<a ymailto="mailto:nsrca-discussion@lists.nsrca.org" href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>><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 at 12-24V and it handles the voltage just fine. I've also run it 4S2100 and 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 higher voltage under a high current loading. If the starter is designed to run on 12V you're pushing your luck with anything much over 14V. That's why things are breaking. A GOOD 3S pack should be more than adequate.<br>><br>> John Pavlick<br>><br>> Ken Velez <<a ymailto="mailto:kvelez@comcast.net" href="mailto:kvelez@comcast.net">kvelez@comcast.net</a>> wrote:<br>> I have a question about all this. I see people using 2S 7.4 @ 8.4V charged and a 4S @ 16.8 V charged. I'm using a 1950 mAh 3S Extreme V2 on mine and although I'm flying Pattern electric mostly I still have other glow set ups including a YS 1.60 and my starter has
no issues starting any of this and while using the 3S doesn't give you any advantage as power increase compeered to the 14.4 Ni-Cad packs available the Li-Po's hold a higher voltage under load without stressing the motor and components. Just my 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 pack? That would be 14v or less.<br>><br>> Bob R.<br>><br>><br>> JShulman <<a ymailto="mailto:jshulman@cfl.rr.com" href="mailto:jshulman@cfl.rr.com">jshulman@cfl.rr.com</a>>
wrote:<br>> 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>> <a target="_blank" href="http://www.jasonshulman.com">www.jasonshulman.com</a><br>> <a target="_blank" href="http://www.shulmanaviation.com">www.shulmanaviation.com</a><br>> <a target="_blank" href="http://www.composite-arf.com">www.composite-arf.com</a><br>><br>> -----Original Message-----<br>>
From: <a ymailto="mailto:nsrca-discussion-bounces@lists.nsrca.org" href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a> [mailto:<a ymailto="mailto:nsrca-discussion-bounces@lists.nsrca.org" href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a>]On Behalf Of<br>> <a ymailto="mailto:adriancwong@earthlink.net" href="mailto:adriancwong@earthlink.net">adriancwong@earthlink.net</a><br>> Sent: Friday, August 22, 2008 3:26 AM<br>> To: <a ymailto="mailto:NSRCA-discussion@lists.nsrca.org" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><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>> <a ymailto="mailto:NSRCA-discussion@lists.nsrca.org" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>> <a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><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: 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: 8/22/2008 6:48 AM<br>><br>><br>> _______________________________________________<br>> NSRCA-discussion mailing list<br>> <a ymailto="mailto:NSRCA-discussion@lists.nsrca.org" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>> <a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><br>><br>><br>><br>><br>>--------------------------------------------------------------------------<br>><br>>
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