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<DIV><FONT size=2> Bill, you are correct about a cars
alternator putting out 100 amps. Some put out less, maybe around 80 amps,
and some put out as much as 130 amps. The concern is that they do not put
out that much current at idle. At best they may put out 20
amps. Before you get the max amperage output of an alternator, you
would need to rev the engine to approx 2,000 rpms. Obviously if you had
the hood open the underhood lamp would also be on, your engine is running, so
you have the ignition system, cooling fans, engine computer, and all of the
sensors needed to make the engine run drawing current. Having said that,
now you add your battery charger, that may or may not put you over what your
alternator may put out at idle and now you are running on just the car
battery. While this is happening the alternator is trying to keep the
battery charged to the best of its ability which is not much at idle, causing
the alternator to burn up. Food for thought.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Mike Darr</FONT></DIV>
<BLOCKQUOTE dir=ltr
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; font-color: black"><B>From:</B>
<A title=billglaze@triad.rr.com href="mailto:billglaze@triad.rr.com">Bill
Glaze</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, August 10, 2003 3:56
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Electric Pattern</DIV>
<DIV><BR></DIV>I can't imagine burning out a perfectly good alternator that is
rated for 100 amps by just charging a battery. I've done it so many
times. Yet, I suppose if there was something else going on, it sure
could happen. I mean, this mechanic said he's seen it. It's just
hard to imagine--my alternators put out ~14.7 volts x 100 amps. = 1,470
watts. Lots of current. Last time I looked, that's more than a
large TV uses, or even a 2 slice toaster. I'd like to know what the DC
current draw is on Jason's chargers.) <BR>Oh, Well. <BR>Bill Glaze
<P>Ron Van Putte wrote:
<BLOCKQUOTE TYPE="CITE">
<P>Bill Glaze wrote:
<BLOCKQUOTE cite=mid3F369C73.2D040DF0@triad.rr.com type="cite">Word I
got was $750 per pack for Jason's setup, and 1-1/2 hr. charge
time. Don't know the power source for the charger.</BLOCKQUOTE>
<P><BR>Tony Stillman reported from Poland that he went to a local car parts
place and bought a car battery and car battery charger for Jason to use in
lieu of charging from the car's battery while it was running.
<P>Ron Van Putte
<BLOCKQUOTE cite=mid3F369C73.2D040DF0@triad.rr.com type="cite"><A
class=moz-txt-link-abbreviated
href="mailto:ArestiPattern@aol.com">ArestiPattern@aol.com</A> wrote:
<BLOCKQUOTE type="CITE"><FONT face="Comic Sans MS"><FONT
color=#800040><FONT size=+0>I'm thinking this new e-pattern flying might
be pretty trick to try. As far as costs go, I'm a bit concerned
about the battery packs and charger needs. I've read the Li-Polys
Jason's using are about $325 bucks each so $700 for the plane (that'll
come down in price for sure). So, if I head to the flying field
after work to bang off 4 to 6 practice rounds in a couple of hours, how
many battery packs and chargers am I gonna have to buy to get this
done? Will I be carrying a Honda portable generator along to power
my 'bank' of chargers as well? What is the re-charge time for one
pack?</FONT></FONT></FONT>
<P><FONT face="Comic Sans MS"><FONT color=#800040><FONT size=+0>I peeked
in the Hacker booth at the last TOC, really impressive stuff and an
awesome halftime show each day. Granted, they were setup to fly
several models at the show, but the spaghetti of wires and chargers they
had to get this accomplished simply twisted the
mind.</FONT></FONT></FONT>
<P><FONT face="Comic Sans MS"><FONT color=#800040><FONT size=+0>Rick
Hannah</FONT></FONT></FONT> <BR><FONT face="Comic Sans MS"><FONT
color=#800040><FONT size=+0>St. Joseph,
Michigan</FONT></FONT></FONT></P></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>