[NSRCA-discussion] Arming Plug/Receptacle Problem

Mon Feb 9 14:59:12 AKST 2009

... 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)

- Robert Beaubien

- NSRCA, District 7 Webmaster

-

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John
Pavlick
Sent: Monday, February 09, 2009 4:41 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem

Some of us like to fly more than 1 flight. :)

John Pavlick

--- On Mon, 2/9/09, Tommy Scarmardo <tretas513 at yahoo.com> wrote:

	From: Tommy Scarmardo <tretas513 at yahoo.com>
	Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem
	To: "General pattern discussion"
<nsrca-discussion at lists.nsrca.org>
	Date: Monday, February 9, 2009, 8:57 PM

Actually I just take my airplane out of my truck (all assembled), charge
the flight

batteries (approx 30 minutes), and fly. When finished put it back in my
truck(assembled),

and drive home !!

--- On Mon, 2/9/09, Jerry Voth <jjvoth at mtelco.net> wrote:

	From: Jerry Voth <jjvoth at mtelco.net>
	Subject: Re: [NSRCA-discussion] Arming Plug/Receptacle Problem
	To: "General pattern discussion"
<nsrca-discussion at lists.nsrca.org>
	Date: Monday, February 9, 2009, 2:39 PM

	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
	>> 
	>> _______________________________________________
	>> NSRCA-discussion mailing list
	>> NSRCA-discussion at lists.nsrca.org
	>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
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