<html><body bgcolor="#FFFFFF"><div>Who gets a fading power curve? <br><br>Sent from my iPhone</div><div><br>On Feb 9, 2009, at 3:59 PM, "Robert L. Beaubien" <<a href="mailto:rob@koolsoft.com">rob@koolsoft.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">... and don't like a fading power curve over the duration of the
flight... Some of us also like to fly longer than 8 minutes. :-) (I love
these religious wars)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">- Robert Beaubien<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">- NSRCA, District 7 Webmaster<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">-<o:p></o:p></span></p>
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color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a>
[<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <b>On Behalf Of </b>John
Pavlick<br>
<b>Sent:</b> Monday, February 09, 2009 4:41 PM<br>
<b>To:</b> <a href="mailto:nsrca-discussion@lists.nsrca.org"><a href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a></a><br>
<b>Subject:</b> Re: [NSRCA-discussion] Arming Plug/Receptacle Problem<o:p></o:p></span></p>
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<p class="MsoNormal">Some of us like to fly more than 1 flight. :)<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">John Pavlick<br>
<br>
--- On <b>Mon, 2/9/09, Tommy Scarmardo <i><<a href="mailto:tretas513@yahoo.com">tretas513@yahoo.com</a>></i></b>
wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">From: Tommy Scarmardo
<<a href="mailto:tretas513@yahoo.com">tretas513@yahoo.com</a>><br>
Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem<br>
To: "General pattern discussion"
<<a href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>><br>
Date: Monday, February 9, 2009, 8:57 PM<o:p></o:p></p>
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<p class="MsoNormal">Actually I just take my airplane out of my truck (all
assembled), charge the flight<o:p></o:p></p>
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<p class="MsoNormal">batteries (approx 30 minutes), and fly. When finished
put it back in my truck(assembled),<o:p></o:p></p>
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<p class="MsoNormal">and drive home !!<o:p></o:p></p>
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--- On <b>Mon, 2/9/09, Jerry Voth <i><<a href="mailto:jjvoth@mtelco.net">jjvoth@mtelco.net</a>></i></b>
wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">From: Jerry Voth
<<a href="mailto:jjvoth@mtelco.net">jjvoth@mtelco.net</a>><br>
Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem<br>
To: "General pattern discussion" <<a href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>><br>
Date: Monday, February 9, 2009, 2:39 PM<o:p></o:p></p>
<pre>I've been lurking for a long time and after reading all the things that one <o:p></o:p></pre><pre>needs to do to successfully fly electric, it makes one wonder how things <o:p></o:p></pre><pre>would be if electrics were the norm from the beginning of powered R/C <o:p></o:p></pre><pre>models. It might go like this;<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Hey guys, I just bought this little IC engine and I tried it on one of my <o:p></o:p></pre><pre>Pattern models and it works really well. "Look what it will do;<o:p></o:p></pre><pre>1. It has just as much power as our electric motors.<o:p></o:p></pre><pre>2. The only batteries you need are for the flight pack, glow igniter and the <o:p></o:p></pre><pre>electric starter if you don't like to flip by hand.<o:p></o:p></pre><pre>3. All you have to do is pump fuel into the tank, spin the engine with the <o:p></o:p></pre><pre>starter and fly.The tail gets a little oily, but what the heck, it's
fairly<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>easy to clean up.(Switching the radio on first is a given.)<o:p></o:p></pre><pre>4. You don't have to haul a generator or an extra car battery around to <o:p></o:p></pre><pre>charge motor batteries."<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Please don't take this the wrong way. It is tongue in cheek and just an <o:p></o:p></pre><pre>observation. I also have too much time on my hands these days.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>JJV<o:p></o:p></pre><pre>----- Original Message ----- <o:p></o:p></pre><pre>From: "Jay Marshall" <<a href="mailto:lightfoot@sc.rr.com">lightfoot@sc.rr.com</a>><o:p></o:p></pre><pre>To: "'General pattern discussion'"<o:p></o:p></pre><pre><<a href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>><o:p></o:p></pre><pre>Sent: Monday, February 09, 2009 1:50 PM<o:p></o:p></pre><pre>Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle
Problem<o:p></o:p></pre><pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>>A 100 ohm resistor may be enough to charge the caps and make the ESC<o:p></o:p></pre><pre>> "active". Bad idea...<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> Jay Marshall<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> -----Original Message-----<o:p></o:p></pre><pre>> From: <a href="mailto:nsrca-discussion-bounces@lists.nsrca.org"><a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a></a><o:p></o:p></pre><pre>> [<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] On Behalf Of Ron Van <o:p></o:p></pre><pre>> Putte<o:p></o:p></pre><pre>> Sent: Monday, February 09, 2009 1:14 PM<o:p></o:p></pre><pre>> To: General pattern discussion<o:p></o:p></pre><pre>> Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> Good.
I will try it. What wattage 100 ohm resistor? Let's see,<o:p></o:p></pre><pre>> doesn't sustained power equal voltage squared, divided by the<o:p></o:p></pre><pre>> resistance? If so, 42 squared, divided by 100 is 17.64 watts.<o:p></o:p></pre><pre>> That's probably overkill, since the current surge is transitory. How<o:p></o:p></pre><pre>> about a 100 ohm, 10 watt resistor?<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> Just thought of something: With the 100 ohm resistor across the<o:p></o:p></pre><pre>> arming plug receptacle, won't the ESC be on whenever the batteries<o:p></o:p></pre><pre>> are plugged into the circuit?<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> BTW, what about Castle Creation's statement that the "spark is<o:p></o:p></pre><pre>your<o:p></o:p></pre><pre>> friend'?<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> Ron<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> On Feb 9, 2009, at 11:55 AM, James Oddino
wrote:<o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>>> Put a 100 ohm resistor across the arming plug receptacle. Then the<o:p></o:p></pre><pre>>> capacitors in the ESC will charge without a spark as you connect<o:p></o:p></pre><pre>>> the batteries. When you connect the arming plug, no spark.<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> Jim<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>><o:p> </o:p></pre><pre>>> On Feb 9, 2009, at 8:08 AM, Ron Van Putte wrote:<o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>>> I have a problem which I am sure many other E-powered airplane<o:p></o:p></pre><pre>>>> owners have that I'd like to solve. I use an arming plug to<o:p></o:p></pre><pre>>>> connect the two 5S Lipo packs to the ESC. On initial contact of<o:p></o:p></pre><pre>>>> the arming plug with the receptacle, there's a big spark<o:p></o:p></pre><pre>thrown.<o:p></o:p></pre><pre>>>> Eventually the contacts on the arming plug and receptacle
get<o:p></o:p></pre><pre>>>> burned to the point where the electrical contact is very bad.<o:p></o:p></pre><pre>>>> Yesterday I had to land my airplane deadstick because (I think)<o:p></o:p></pre><pre>>>> the ESC saw what it thought was low voltage out of the battery<o:p></o:p></pre><pre>>>> that was actually due to the burned arming plug/receptacle<o:p></o:p></pre><pre>>>> contacts. BTW, I am using high-amp Anderson Power Pole<o:p></o:p></pre><pre>>>> connectors, which are probably more susceptible to having the<o:p></o:p></pre><pre>>>> contacts burned than would Deans Ultra connectors.<o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> I have thought about putting a BIG capacitor in parallel with the<o:p></o:p></pre><pre>>>> arming plug, that would damp the initial current surge which<o:p></o:p></pre><pre>>>> causes the spark. The capacitor could be removed before flight.<o:p></o:p></pre><pre>>>> However, I'm wondering if there's a more elegant
solution.<o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> Ron Van Putte<o:p></o:p></pre><pre>>>><o:p> </o:p></pre><pre>>>> _______________________________________________<o:p></o:p></pre><pre>>>> NSRCA-discussion mailing list<o:p></o:p></pre><pre>>>> <a href="mailto:NSRCA-discussion@lists.nsrca.org"><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a></a><o:p></o:p></pre><pre>>>> <a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></a><o:p></o:p></pre><pre>>><o:p> </o:p></pre><pre>>> _______________________________________________<o:p></o:p></pre><pre>>> NSRCA-discussion mailing list<o:p></o:p></pre><pre>>> <a href="mailto:NSRCA-discussion@lists.nsrca.org"><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a></a><o:p></o:p></pre><pre>>> <a
href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></a><o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> _______________________________________________<o:p></o:p></pre><pre>> NSRCA-discussion mailing list<o:p></o:p></pre><pre>> <a href="mailto:NSRCA-discussion@lists.nsrca.org"><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a></a><o:p></o:p></pre><pre>> <a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></a><o:p></o:p></pre><pre>><o:p> </o:p></pre><pre>> _______________________________________________<o:p></o:p></pre><pre>> NSRCA-discussion mailing list<o:p></o:p></pre><pre>> <a href="mailto:NSRCA-discussion@lists.nsrca.org"><a
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<o:p></o:p></pre><pre>17:57:00<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>NSRCA-discussion mailing list<o:p></o:p></pre><pre><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><o:p></o:p></pre><pre><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><o:p></o:p></pre></blockquote>
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