[NSRCA-discussion] Arming Switch

[Keith Black]

Dave, you're points are correct, but you're not taking into account a
malfunction of the speed controller itself. They have been know to
malfunction, so the safest approach, as Earl suggests, is to assume that
anytime the battery is connected to the controller the motor may go to full
throttle. Until you unplug the battery the thing is hot and dangerous
regardless of your fail safe or switches on the transmitter.

Regarding pulling the disconnect (whether under canopy or via external
arming pin), step over the model between wings and stab (just like we used
to run up the glow models) and reach down to pull the plug. If it goes full
throttle the back of your legs will stop forward momentum.

I see far too often that people switch off their radios with the plane in a
potential dangerous position. This is putting a lot of trust in the
technology when it's not necessary. When I retrieve my model,  transmitter
in hand or not, I make sure it is pointed away from people or property.

Keith

On Sun, Feb 12, 2012 at 2:28 PM, Dave Harmon <k6xyz at sbcglobal.net> wrote:

> +1 on that.****
>
> Rather than having a disconnect, I think ensuring that the fail safe
> function of the radio is set properly is the way to go.****
>
> Generally…with today’s 2.4g radios…..not 72mhz PCM radios….I trust the
> electronics more than someone holding the transmitter. ****
>
> Besides….with a disconnect it would be my luck to rip the side of the
> fuselage off and start a fire that way………or not being able to let go of a
> full throttle model to pull the disconnect….in this case just turn off the
> transmitter and/or have an external radio switch and turn off the receiver.
> ****
>
> The ESC will shut off the motor when the ESC loses the pulse from the
> receiver…even if the failsafe is NOT configured correctly.****
>
> Everyone already knows this….or should know it…. but it’s a good thing to
> mention anyway…..****
>
> ** **
>
> ** **
>
> *Dave Harmon*
>
> *NSRCA 586*
>
> *K6XYZ[at]sbcglobal[dot]net*
>
> *Sperry, Ok.*
>
> ** **
>
> *From:* nsrca-discussion-bounces at lists.nsrca.org [mailto:
> nsrca-discussion-bounces at lists.nsrca.org] *On Behalf Of *Keith Hoard
> *Sent:* Sunday, February 12, 2012 1:44 PM
> *To:* General pattern discussion
> *Subject:* Re: [NSRCA-discussion] Arming Switch****
>
> ** **
>
> I'd rather not cut a hole in my plane in the first place, or add another
> point of failure to the system. . . .
>
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com
>
>
>
> ****
>
> On Sun, Feb 12, 2012 at 1:37 PM, Ronald Van Putte <vanputte at cox.net>
> wrote:****
>
> You can mount a female Deans connector in a piece of thin plywood, use
> Pacer Pro Zap to glue the Deans connector to the plywood and, after cutting
> an appropriate hole in the side of the fuselage, glue the assembly inside
> the fuselage.  Use a male Deans connector with the leads soldered together
> as an arming plug.****
>
> ** **
>
> Or you can buy a SharpRC SafeArm (
> http://www.sharprc.com/catalog/index.php?cPath=43)****
>
> ** **
>
> Being cheap, I do the former.****
>
> ** **
>
> Ron Van Putte****
>
>   ****
>
> On Feb 12, 2012, at 11:55 AM, Ron Hansen wrote:****
>
> ** **
>
> What are the available arming switch options?****
>
>  ****
>
> Thanks****
>
>  ****
>
> Ron****
>
>
>
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>
> The message was checked by ESET Smart Security.
>
> http://www.eset.com****
>
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