[NSRCA-discussion] Arming device

[Vicente Bortone]

The code requieres external disconnect.  So that rule does not meet
electrical codes.





On Saturday, May 16, 2015, Atwood, Mark via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

>  No rule changes in effect for this year.
>
>  Also, the rule that's proposed is to restrain the plane while running or
> armed.  No requirement that the arming plug be external.  Just that a
> physical disconnect is required to leave the plane unattended.
>
> Sent from my average intelligence  phone
>
>
> On May 16, 2015, at 10:16 AM, Keith Hoard via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>> wrote:
>
>   So, is an EXTERNAL ARMING PLUG required or not this year at the Nats?
> Cause I still haven’t made hotel reservations . .
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion-bounces at lists.nsrca.org');>]
> *On Behalf Of *lucky macy via NSRCA-discussion
> *Sent:* Saturday, May 16, 2015 9:15 AM
> *To:* nsrca-discussion at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>
> *Subject:* Re: [NSRCA-discussion] Arming device
>
>
>
> As the original poster who started the original thread that sailed the
> seven seas and spun a new universe and war of words, I can tell you I was
> totally unswayed by proponents of not using something like the Power
> Unlimited Arming Plug.  This is despite the fact I didn't want to use one
> either if it made sense was really hoping there was more to the logic and
> technical execution of how those without external arming plugs were
> operating safely that what I was originally guessing was there.
>
>  So I long ago added such a device like I've done previously to my new
> Mythos S Pro over the winter.  After reading every one of the emails I now
> think it's silly not to have an external arming plug and I hope the rules
> are enforced at the Nats this year on the subject cuz some of the line of
> the excuses that had me in stitches were that such a device adds
> unnecessary cost, weight, complexity or, god bless, extra drag that's not
> symmetrical on the airframe.  Those need to be, well, dealt with...  :-)
>
> Member number 1 of the new external arming plug police...  ;-)
>
> Lucky
>
>
>  ------------------------------
>
> Date: Sat, 16 May 2015 13:16:37 +0000
> To: circuitboard35 at yahoo.com
> <javascript:_e(%7B%7D,'cvml','circuitboard35 at yahoo.com');>;
> nsrca-discussion at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>
> Subject: Re: [NSRCA-discussion] Arming device
> From: nsrca-discussion at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>
>
> I'm in agreement.
>
> Ron Lockhart
>
>
>  ------------------------------
>
> *From: *"David via NSRCA-discussion" <nsrca-discussion at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>>
> *To: *nsrca-discussion at lists.nsrca.org
> <javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>
> *Sent: *Saturday, May 16, 2015 1:14:21 AM
> *Subject: *[NSRCA-discussion] Arming device
>
>
>
> I'm not trying to bring up a sore subject but this has been bugging me
> since it was up a while back. I am the senior electronics technician in the
> plasma physics department at the University of Wisconsin. About a third of
> what I do is make interlock circuits for the Madison Symmetric Torus. I
> know that the best way of keeping things safe is to remove the potential
> energy from a circuit to keep bad things from happening. The problem with
> depending on a circuit such as the emcotec type of disconnect or to just
> relying solely on the radio and ESC to keep things safe is failure modes.
> You can plan for all different failure types but to make it a circuit that
> isn't a lead brick being added to the plane there are compromises that have
> to be made. This leads to designing systems that may deal with only the
> most common types of failures. For example most common diodes and tantalum
> capacitors usually fail in a shorted mode, but not always. Many carbon
> resistors will decrease in résistance just prior to opening up. You get the
> idea, there are just so many possibilities and combinations that in my
> opinion the only real way to safe a power system is to disconnect the
> energy source. Ok, now I feel better that I said something.
>
>
>
> David
>
>
>
>
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-- 
Vicente "Vince" Bortone
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