<HTML><BODY STYLE="font:10pt verdana; border:none;"><DIV>E</DIV> <DIV>At the Nats this year I flew a flight where I had a jammed elevator servo (no up elevator).</DIV> <DIV>I was holding full up with the jam during the 2 minutes of landing attempt > I did manage a</DIV> <DIV>scored landing using throttle to increase and decrease altitude. All this to say,</DIV> <DIV> that the battery pack was completely down at the end. This was the 2nd flight so I consumed 50% of the battery reserve in this short time.</DIV> <DIV>E- If you remember we discussed this problem at the Olive Garden that night.</DIV> <DIV> It doesn't take but one problem and if you don't have battery reserve the game is over.</DIV> <DIV> </DIV> <DIV>True story</DIV> <DIV>Jim Ivey </DIV> <DIV> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt Arial">----- Original Message -----</DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B> Henderson,Eric</DIV> <DIV style="FONT: 10pt Arial"><B>Sent:</B> Thursday, July 31, 2003 9:55 AM</DIV> <DIV style="FONT: 10pt Arial"><B>To:</B> discussion@nsrca.org</DIV> <DIV style="FONT: 10pt Arial"><B>Subject:</B> RE: Battery question</DIV> <DIV> </DIV>To get more peace of mind Terry,<BR><BR>I would fit a C-volt digital display. With digital servos the current drain can be very high with the engine running. Any unusual readings are a clue not to fly. Saved 4 planes so far by looking at the display during run-up. The problem is that if you fly, flight four or five in your case, and a problem develops you need a big reserve.<BR><BR>A hung gear, a bad pot on an aileron, a stuck throttle etc can need as much as 500 mAh to get you down. Charging after 3 flights, as Steve said, is a sensible margin. I would switch to NiMH to avoid the memory issue of Nicads.<BR><BR>Eric.<BR><BR>BTW - I am running 2000 mAh Li-ions now, (for two seasons). Lighter, easier to charge, plug and leave, charger is like cigar charger for cell phones, fully up after less than two hours, very slow discharge rate.<BR><BR><BR>-----Original Message-----<BR>From: discussion-request@nsrca.org<BR>[mailto:discussion-request@nsrca.org]On Behalf Of Brian Young<BR>Sent: Thursday, July 31, 2003 8:55 AM<BR>To: discussion@nsrca.org<BR>Subject: Re: Battery question<BR><BR><BR>Im flying a 1400 mah nicad pack, analog on throttle<BR>digi on everything else.<BR><BR>I go no more than three flights of masters two times<BR>through each flight, I put back in 1100-1200 mah. So,<BR>Im leaving very little reserve. I would rather use<BR>only half the pack and fly four times, but that means<BR>changing to lithium batteries so next plane I will do<BR>that.<BR><BR>BTW I almost learned the hard way about this. Before I<BR>knew this I landed after four flights and as I taxied<BR>back I noticed my ailerons kind of slowly waiving up<BR>and down. Checked the pack and it was nearly gone.<BR><BR><BR>--- Terry Terrenoire <amad2terry@juno.com> wrote:<BR>> Just flying my first ship with 4 digital servos.<BR>> Power is supplied by a<BR>> standard Nicad, 1100 mah, battery.<BR>> After 3 flights the other day it took 361ma to<BR>> refill it<BR>> How mych reserve did I have ?<BR>> Used an average of 120 ma per flight.<BR>> How many flights can I SAFELY get on that 1100 mah<BR>> pack?<BR>> <BR>> Terry T.<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><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! SiteBuilder - Free, easy-to-use web site design software<BR>http://sitebuilder.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><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><BR></BLOCKQUOTE></BODY></HTML>