<DIV>Hmmmmm, that seems high. I did some quick math, my typical battery consumption of 100mAH per flight works out to an average current draw of 750mAH for 8 minutes of flight time.</DIV>
<DIV> </DIV>
<DIV>That being said, your test appears valid. Looks like those digital servos are working real hard to hold their position. </DIV>
<DIV> </DIV>
<DIV>My servo extensions are 22 gauge wire. Some quick checking of wire current capacity shows a 22 gauge vinyl jacketed wire can carry 8 amps continuously without melting the insulation, so 3 amps should not get it hot. </DIV>
<DIV> </DIV>
<DIV><B><I>Brian Young <b4598070@yahoo.com></I></B> wrote:</DIV>
<BLOCKQUOTE style="BORDER-LEFT: #1010ff 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">I found I wasnt getting the capacity I thought I<BR>should w/ my 1800 mah 6 cell flight pack. After two<BR>masters sequences I recharged and put back in 600mah<BR>(triton charger), pack was topped up prior to flight. <BR><BR>So back home, I put a current meter between the<BR>battery and receiver. I draw about 90 mA with all<BR>servos connected, each servo unplugged the total drops<BR>by 15 mA, except for the throttle which drops 10 mA.<BR>Wiggle the sticks and I can occasionally get over 300<BR>mah. This didnt seem unusual to me, anyone disagree? <BR><BR>So I left the meter in place and started the plane, at<BR>idle the meter was reading 3 Amps, yep 3. Has anyone<BR>else done this? <BR><BR>I move the trottle off idle a little and the current<BR>drops to about 2-2.5 Amps, so my throttle servo is<BR>bottoming a bit.<BR><BR>3 Amps in this gauge wire seems like it should be<BR>getting something hot, but I hooked the multimeter up<BR>in series with my battery just like I learned in<BR>school.<BR><BR>The servos are all digital JRs with over one season<BR>use, except I did replace the Aileron servos w/ new<BR>yesterday but havent had a chance to repeat my test.<BR>All thoughts on what could be causing this are<BR>appreciated. Otherwise a 4000 mah flight pack is<BR>looking good to me. Is there any reason a worn servo<BR>would draw more current? <BR><BR><BR>Thanks.,<BR><BR>--- Dean Pappas <D.PAPPAS@KODEOS.COM>wrote:<BR>> There are plenty of us nicad stalwarts!<BR>> Mark, I agree with your reliability/convenience<BR>> assessment.<BR>> My 5-cell SR 1000 mAH is good for better than 5<BR>> flights, as I have<BR>> repeatedly measured the consumption of a<BR>> all-digitals practice flight at 145 mAH.<BR>> I'm considering going to a 500 pack and after every<BR>> flight top-ups with the Sirius.<BR>> That gets the weight to the point where any<BR>> disadvantage to the nicad is, in my opinion,<BR>> greatly outweighed by their reliability.<BR>> <BR>> Dean pappas <BR>> <BR>> -----Original Message-----<BR>> From: Atwood, Mark [mailto:atwoodm@paragon-inc.com]<BR>> Sent: Friday, April 11, 2003 10:22 AM<BR>> To: discussion@nsrca.org<BR>> Subject: RE: Best battery choice?<BR>> <BR>> <BR>> Lol....ok Anthony...then there's two of us flying<BR>> Nicads. I use some of the newer technologies for my<BR>> electrics, but with regard to Pattern, the new<BR>> batteries appear to fix problems I don't have. I<BR>> run a 5cell 6v 1400mah nicad pack. I personally<BR>> haven't heard an argument that even comes close to<BR>> making me want to change. <BR>> Cost/reliability/convenience all seem to favor<BR>> Nicads. The only one against it is weight. And<BR>> from my perspective, if I need that ounce...I have<BR>> bigger problems. Just my .02...I'd love to hear<BR>> others opinions on the subject...<BR>> <BR>> mark<BR>> <BR>> -----Original Message-----<BR>> From: AAbdu@aol.com [mailto:AAbdu@aol.com] <BR>> Sent: Friday, April 11, 2003 10:00 AM<BR>> To: discussion@nsrca.org<BR>> Subject: Best battery choice?<BR>> <BR>> It seems like every month a new battery technology<BR>> is introduced. NiMh, Lithium ion, NiCad etc. Each<BR>> one claiming to be better than the last. It seems<BR>> like I am the last pattern flyer still using old<BR>> familiar, heavy, memory burdoned NiCads. I am<BR>> considering investing in updated batteries and all<BR>> of the other things needed to maintain them. I have<BR>> accepted that I will need not only the battery, but<BR>> a new charger, regulator, and all the other fixins.<BR>> Given that condition, what is the latest info pro<BR>> and con on the new battery technology. I know there<BR>> was an availability issue with the duralites that<BR>> has seemed to be resolved, then I remembered hearing<BR>> something about them overheating or blowing up or<BR>> spontaneously combusting or something. My point is,<BR>> there is a lot of misinformation out there and I am<BR>> trying to find out what works best from those who<BR>> use it. <BR>> In order of importance of features:<BR>> 1. Reliability<BR>> 2. Weight (lighter is better)<BR>> 3. Capacity, can I get 5 flights on them, can they<BR>> be quick charged?<BR>> 4. Durability / margin of error / expected life<BR>> span. If I leave the RX on do I have to replace<BR>> them?<BR>> 5. Price<BR>> 6. Availibility <BR>> <BR>> I appreciate any information you guys can provide.<BR>> Thank you.<BR>> Anthony<BR>> =====================================<BR>> # To be removed from this list, send a message to <BR>> # discussion-request@nsrca.org<BR>> # and put leave discussion on the first line of the<BR>> body.<BR>> #<BR>> <BR>> <BR>> ============# To be removed from this list, send a<BR>> message to <BR>> # discussion-request@nsrca.org<BR>> # and put leave discussion on the first line of the<BR>> body.<BR>> #<BR>> <BR>> ====================================# To be removed<BR>> from this list, send a message to<BR>> # discussion-request@nsrca.org<BR>> # and put leave discussion on the first line of the<BR>> body.<BR>> #<BR>> <BR><BR><BR>=====<BR>Brian Young<BR>Tulsa<BR>b4598070@yahoo.com<BR>918-745-6046h<BR>918-838-0900w<BR><BR>__________________________________________________<BR>Do you Yahoo!?<BR>Yahoo! Tax Center - File online, calculators, forms, and more<BR>http://tax.yahoo.com<BR>=====================================<BR># To be removed from this list, send a message to <BR># discussion-request@nsrca.org<BR># and put leave discussion on the first line of the body.<BR>#<BR></BLOCKQUOTE><BR><BR>Bob Kane<br>getterflash@yahoo.com<p><br><hr size=1>Do you Yahoo!?<br>
<a href="http://us.rd.yahoo.com/finance/mailsig/*http://tax.yahoo.com">Yahoo! Tax Center</a> - File online, calculators, forms, and more