[NSRCA-discussion] Arming Plug/Receptacle Problem

Mon Feb 9 13:06:44 AKST 2009

If she had ever seen a foamy cut loose in a garage after guessing wrong
about whether the throttle channel was reversed or not. . . . .

I'm just sayin' . . . .

On Mon, Feb 9, 2009 at 4:01 PM, Tommy Scarmardo <tretas513 at yahoo.com> wrote:

> The big difference I've seen since I've been flying electric is I've pissed
> my caller (my wife)
> off. If I tell her one more time to not stand in front of the airplane or
> near the propeller I think
> she's going to shoot me ! Maybe I'm a little over cautious but I've seen a
> couple of electrics
> get away from people by accident at my local flying field.
>
> --- On *Mon, 2/9/09, Ron Van Putte <vanputte at cox.net>* wrote:
>
> From: Ron Van Putte <vanputte at cox.net>
> Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem
> To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
> Date: Monday, February 9, 2009, 2:56 PM
>
> No offense taken.  I have noticed several differences between the "care and
> feeding" of Glow vs Electric Pattern airplanes.  It is true that I
> don't need a LOT of support equipment for my Glow airplanes, but I do need
> to haul fuel, fuel pump, starter, glow igniter and cleaning rags that I
> don't need for my Electric airplanes.  However, I do need extra batteries or
> charging gear if I plan on a long session at the flying field with my Electric
> airplane and I spend more time charging batteries at home with an Electric
> airplane than a Glow airplane.  I do have to be more careful in Electric
> airplane operation, so that an airplane that's supposed to be safe won't
> bite me because I did something I shouldn't have done or didn't do
> something I should have done.
>
> Ron
>
> On Feb 9, 2009, at 2:39 PM, Jerry Voth wrote:
>
> > I've been lurking for a long time and after reading all the things
> that one needs to do to successfully fly electric, it makes one wonder how
> things would be if electrics were the norm from the beginning of powered R/C
> models. It might go like this;
> >
> > Hey guys, I just bought this little IC engine and I tried it on one of my
> Pattern models and it works really well. "Look what it will do;
> > 1. It has just as much power as our electric motors.
> > 2. The only batteries you need are for the flight pack, glow igniter and
> the electric starter if you don't like to flip by hand.
> > 3. All you have to do is pump fuel into the tank, spin the engine with the
> starter and fly.The tail gets a little oily, but what the heck, it's fairly
> easy to clean up.(Switching the radio on first is a given.)
> > 4. You don't have to haul a generator or an extra car battery around
> to charge motor batteries."
> >
> > Please don't take this the wrong way. It is tongue in cheek and just
> an observation. I also have too much time on my hands these days.
> >
> > JJV
> > ----- Original Message ----- From: "Jay Marshall"
> <lightfoot at sc.rr.com>
> > To: "'General pattern discussion'"
> <nsrca-discussion at lists.nsrca.org>
> > Sent: Monday, February 09, 2009 1:50 PM
> > Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem
> >
> >
> >> A 100 ohm resistor may be enough to charge the caps and make the ESC
> >> "active". Bad idea...
> >>
> >> Jay Marshall
> >>
> >> -----Original Message-----
> >> From: nsrca-discussion-bounces at lists.nsrca.org
> >> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ron Van
> Putte
> >> Sent: Monday, February 09, 2009 1:14 PM
> >> To: General pattern discussion
> >> Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem
> >>
> >> Good.  I will try it.  What wattage 100 ohm resistor?  Let's see,
> >> doesn't sustained power equal voltage squared, divided by the
> >> resistance?  If so, 42 squared, divided by 100 is 17.64 watts.
> >> That's probably overkill, since the current surge is transitory.
> How
> >> about a 100 ohm, 10 watt resistor?
> >>
> >> Just thought of something:  With the 100 ohm resistor across the
> >> arming plug receptacle, won't the ESC be on whenever the batteries
> >> are plugged into the circuit?
> >>
> >> BTW, what about Castle Creation's statement that the "spark
> is your
> >> friend'?
> >>
> >> Ron
> >>
> >> On Feb 9, 2009, at 11:55 AM, James Oddino wrote:
> >>
> >>> Put a 100 ohm resistor across the arming plug receptacle.  Then
> the
> >>> capacitors in the ESC will charge without a spark as you connect
> >>> the batteries.  When you connect the arming plug, no spark.
> >>>
> >>> Jim
> >>>
> >>>
> >>> On Feb 9, 2009, at 8:08 AM, Ron Van Putte wrote:
> >>>
> >>>> I have a problem which I am sure many other E-powered airplane
> >>>> owners have that I'd like to solve.  I use an arming plug
> to
> >>>> connect the two 5S Lipo packs to the ESC.  On initial contact
> of
> >>>> the arming plug with the receptacle, there's a big spark
> thrown.
> >>>> Eventually the contacts on the arming plug and receptacle get
> >>>> burned to the point where the electrical contact is very bad.
> >>>> Yesterday I had to land my airplane deadstick because (I
> think)
> >>>> the ESC saw what it thought was low voltage out of the battery
> >>>> that was actually due to the burned arming plug/receptacle
> >>>> contacts.  BTW, I am using high-amp Anderson Power Pole
> >>>> connectors, which are probably more susceptible to having the
> >>>> contacts burned than would Deans Ultra connectors.
> >>>>
> >>>> I have thought about putting a BIG capacitor in parallel with
> the
> >>>> arming plug, that would damp the initial current surge which
> >>>> causes the spark.  The capacitor could be removed before
> flight.
> >>>> However, I'm wondering if there's a more elegant
> solution.
> >>>>
> >>>> Ron Van Putte
> >>>>
> >>>> _______________________________________________
> >>>> NSRCA-discussion mailing list
> >>>> NSRCA-discussion at lists.nsrca.org
> >>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >>>
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> >
> >
> >
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-- 

Keith Hoard
Collierville, TN
khoard at gmail.com
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