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    I have personally tested 2 ESCs  for 10S (budget brands) that flew
    just fine but would start up on their own if you turned the receiver
    off without unplugging the flight battery.  In both cases, I
    notified the manufacturer and one never replied and the other said
    their ESC "worked as intended" so be very careful expecting the
    electronics to always work as you think they should.  <br>
    <br>
    I agree that high end equipment and flawless installation and usage
    is a safe way to go but way too many of the planes I have seen have
    neither of these qualities and a mechanical break in the power lead
    is 100% effective.<br>
    <br>
    Nobody yet has mentioned probably the most important issue and that
    is I don't want someone else responsible for removing my canopy and
    plugging /unplugging the battery and in the case of preflight,
    making sure the canopy is reinstalled securely prior to flight or
    removing it on the runway only to have it blow across the concrete
    while trying to unplug the flight battery after flight.<br>
    <br>
    Chris<br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 2/23/2015 1:30 PM, Ron Hansen via
      NSRCA-discussion wrote:<br>
    </div>
    <blockquote
      cite="mid:E5933EC7-86BB-4AFF-94D3-11F8C6AE867F@wowway.com"
      type="cite">
      <meta http-equiv="content-type" content="text/html;
        charset=windows-1252">
      <div>How many have witnessed one or more of the following events:</div>
      <div><br>
      </div>
      <div>Taken off without properly charged receiver, transmitter or
        primary batteries</div>
      <div><br>
      </div>
      <div>Forgot to plug in ailerons </div>
      <div><br>
      </div>
      <div>Forgot to insert wing bolts</div>
      <div><br>
      </div>
      <div>Forgot to turn off transmitter or receiver at the end of
        flight </div>
      <div><br>
      </div>
      <div>Forgot to disarm batteries at the end of flight</div>
      <div><br>
      </div>
      <div>Seems to me far too many responding to this thread suggest
        these things have never happen. Those folks are not being
        honest. </div>
      <div><br>
      </div>
      <div>Argue the merits of why an external visual indicator should
        not be in our AMA rules. Saying it isn't foolproof or adds
        weight or cost too much or it never happens in your experience
        doesn't carry weight with me. </div>
      <div><br>
      </div>
      <div>These things happen far more often than we care to admit. </div>
      <div><br>
      </div>
      <div><br>
        <br>
        Sent from my iPhone</div>
      <div><br>
        On Feb 23, 2015, at 12:42 PM, Derek Koopowitz via
        NSRCA-discussion <<a moz-do-not-send="true"
          href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>>
        wrote:<br>
        <br>
      </div>
      <blockquote type="cite">
        <div>
          <div dir="ltr">I think the failsafe demonstration should occur
            when the airplanes are processed - weighed and measured?</div>
          <div class="gmail_extra"><br>
            <div class="gmail_quote">On Mon, Feb 23, 2015 at 9:38 AM,
              Ronald Van Putte via NSRCA-discussion <span dir="ltr"><<a
                  moz-do-not-send="true"
                  href="mailto:nsrca-discussion@lists.nsrca.org"
                  target="_blank">nsrca-discussion@lists.nsrca.org</a>></span>
              wrote:<br>
              <blockquote class="gmail_quote" style="margin:0 0 0
                .8ex;border-left:1px #ccc solid;padding-left:1ex">
                <div style="word-wrap:break-word">I use an arming system
                  on my competition airplanes.  That doesn’t make my
                  system foolproof, but I fail to see that it introduces
                  safety issues.   Maybe the wiring could fail and the
                  motor not start when commanded, but any reasonable
                  wiring failure I can think of would not result in the
                  motor running.  
                  <div><br>
                  </div>
                  <div>Of greater concern to me is that many pilots
                    either have not or have improperly set up the
                    failsafe for when the transmitter is turned off.   I
                    witnessed an accident that resulted in the
                    destruction of one airplane and severe damage of
                    another when the pilot turned off his transmitter. 
                    Fortunately, nobody was hurt.</div>
                  <div><br>
                  </div>
                  <div>I am tempted to ask the Nats event director (Bob
                    Kane) to have the line chiefs request that pilots
                    demonstrate their airplane’s failsafe operation
                    prior to their first official flight at the Nats.</div>
                  <div><br>
                  </div>
                  <div>Ron Van Putte</div>
                  <div><br>
                    <div>
                      <blockquote type="cite">
                        <div>On Feb 23, 2015, at 11:05 AM, DaveL322 via
                          NSRCA-discussion <<a moz-do-not-send="true"
href="mailto:nsrca-discussion@lists.nsrca.org" target="_blank">nsrca-discussion@lists.nsrca.org</a>>
                          wrote:</div>
                        <br>
                        <div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">How
                            many runaways have happened with electrics
                            at pattern contests?  Since maybe 2008 when
                            substantial numbers of electrics were being
                            used?  Personally,  I have never seen one.</div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
                          </div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">How
                            many IC engines have I seen inadvertently
                            started at half or full throttle since
                            2008?  I have personally seen several.</div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
                          </div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Have
                            there been instances of of arming plugs and
                            wiring fail?  Yes.</div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
                          </div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">A
                            lot of things could go wrong resulting in a
                            potential safety hazard with IC or electric
                            patterns planes.  Having a safe procedure
                            and sticking to it 100% is the
                            issue.....accidents happens when procedures
                            are not followed.  Arming plugs themselves
                            do not make electrics safe....they do
                            introduce another failure point.</div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
                          </div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
                          </div>
                          <span
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">Regards,</span>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Dave</div>
                          <div
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                          </div>
                          <div
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                            on a Sprint Samsung Galaxy Note® 3</div>
                          <br
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                          <br
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                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">--------
                            Original message --------</div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">From:
                            Budd Engineering via NSRCA-discussion <<a
                              moz-do-not-send="true"
                              href="mailto:nsrca-discussion@lists.nsrca.org"
                              target="_blank">nsrca-discussion@lists.nsrca.org</a>><span> </span></div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Date:02/23/2015
                            11:50 AM (GMT-05:00)<span> </span></div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">To:
                            Matthew Finley <<a moz-do-not-send="true"
                              href="mailto:rcfin02@msn.com"
                              target="_blank">rcfin02@msn.com</a>>,
                            General pattern discussion <<a
                              moz-do-not-send="true"
                              href="mailto:nsrca-discussion@lists.nsrca.org"
                              target="_blank">nsrca-discussion@lists.nsrca.org</a>><span> </span></div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Cc:<span> </span></div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Subject:
                            Re: [NSRCA-discussion] Matt Finley ( Arming
                            Plug )<span> </span></div>
                          <div
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                          </div>
                          <div
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                            nearly every contest I've attended since I
                            started flying electric in pattern (the 2004
                            Nats in Masters) I've seen at least one
                            occurrence where someone retrieved a plane
                            without removing an arming plug first. 
                            Usually the pilot reminds the person to do
                            it while they're carrying the plane back or
                            as they're setting it down somewhere.  It
                            happens with my planes too and I make sure
                            they switch the receiver off and then I
                            remove my canopy and disconnect the battery
                            directly.  But before they even get that far
                            I've taken the other steps to make sure
                            there's virtually no chance the motor is
                            going to run.</div>
                          <div
style="font-family:ArialMS;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
                          </div>
                          <div
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                            point is this.  A layered approach is the
                            only way I've found to effectively mitigate
                            this particular risk to the levels of safety
                            that you claim.  Relying on someone to
                            remove an arming plug is not a complete
                            panacea and may lend a false sense of
                            security that the motor system has been
                            de-energized, when in fact it may not have
                            been.  There's many ways to manage the risk
                            to the desired level, the use of an arming
                            plug is one, and may not necessarily be the
                            best.</div>
                          <div
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                          </div>
                          <div
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                            <br>
                            Sent from my iPhone</div>
                          <div
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                            On Feb 23, 2015, at 5:29 AM, Matthew Finley
                            via NSRCA-discussion <<a
                              moz-do-not-send="true"
                              href="mailto:nsrca-discussion@lists.nsrca.org"
                              target="_blank">nsrca-discussion@lists.nsrca.org</a>>
                            wrote:<br>
                            <br>
                          </div>
                          <blockquote type="cite"
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                            <div>
                              <div dir="ltr"><b>I use the Ultra Deans
                                  stlye Arming Plug from F3A Unlimited,
                                  and It works very well. I would
                                  gather it provides you with a 99 %
                                  dagree of confidence that your
                                  caller , plane carrier , yourself, or
                                  anyone else will not be harmed. Yes...
                                  I do agree that there is a miniscuel
                                  chance that a pilot / caller could
                                  forget to unplug the safety, however I
                                  feel most pilots that have been doing
                                  it a while is like tying your shoes,
                                  or etc.... On all of my electrics
                                  except for indoor ships, I have some
                                  sort of disconnect. I for one would
                                  like to see it an inforced rule at all
                                  sanctioned meets not just pattern
                                  meets, that any plane over a certain
                                  size or weight must have one in order
                                  to fly. Just my three pennies<span> </span><br>
                                </b><br>
                                <br>
                                <i><b>Matthew E. Finley</b></i><br>
                                QCI - Technology Assistant<br>
                                <a moz-do-not-send="true"
                                  href="tel:614-557-3846"
                                  value="+16145573846" target="_blank">614-557-3846</a>
                                Mobile<br>
                                <a moz-do-not-send="true"
                                  href="mailto:mfinley@quadcityinnovations.com"
                                  target="_blank">mfinley@quadcityinnovations.com</a><span> </span><br>
                                <br>
                                 <span> </span></div>
                            </div>
                          </blockquote>
                          <blockquote type="cite"
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                            <div><span>_______________________________________________</span><br>
                              <span>NSRCA-discussion mailing list</span><br>
                              <span><a moz-do-not-send="true"
                                  href="mailto:NSRCA-discussion@lists.nsrca.org"
                                  target="_blank">NSRCA-discussion@lists.nsrca.org</a></span><br>
                              <span><a moz-do-not-send="true"
                                  href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"
                                  target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></span></div>
                          </blockquote>
                          <span
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                          <span
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                            mailing list</span><br
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                          <span
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