[NSRCA-discussion] Arming Switch

Mon Feb 13 14:55:05 AKST 2012

I'm with you Dave.. When I killed the throttle on my glow I knew it always stop running and stayed stopped and safe for all.. How quick some that abandoned glow for the latest rage never discussed the tradeoffs they were truly accepting.. I always figured if "E" power was all its was being claimed to be it would be cheaper and more viable than glow.  After reading all of this thread it seems the exact opposite it. When I return to competition it will be with the safe glow go juice or not at all. 

I can enjoy all of my anatomy while wiping off that yucky glow residue. <( ;+)~~~*

    Del 
  ----- Original Message ----- 
  From: Dave Harmon 
  To: 'General pattern discussion' 
  Sent: Sunday, February 12, 2012 11:55 PM
  Subject: Re: [NSRCA-discussion] Arming Switch

  I understand.no problem...but in the instances you mention..you just can't fix stupid..

  But yet...I have yet to see anyone have a discussion on properly setting the failsafe throttle of a glow powered airplane.

  This is kind of like some E-flyers that flew glow for years and years and wiped the oil off without a word, then when they convert to electric, wiping the oil off a glow plane is suddenly a big deal..and they kinda go on and on about it.

  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 Black
  Sent: Sunday, February 12, 2012 9:24 PM
  To: General pattern discussion
  Subject: Re: [NSRCA-discussion] Arming Switch

  Dave, I wasn't saying an arming pin is mandatory, I've had planes with and without (currently without for weight), though I much prefer with. 

  My point (for everyone's consumption not only you) was to be careful trusting the fail safe and the receiver power down behavior because occasionally speed controls do malfunction. They are definitely better now days, but far too often I see guys do things that open the door for disaster (I'm not saying you're doing this), and it's pretty scary. People just don't always appreciate the danger involved. 

  For example, I've seen guys finish a flight, turn off their radio and walk to the pits, meanwhile the caller brings back plane and sets it down in pits while pilot walks around talking for minutes with this potentially live plane sitting there still armed. If everything works as it should no one will get hurt, but the potential is there for serious consequences. 

  Cheers!

  Keith  

  On Sun, Feb 12, 2012 at 5:01 PM, Dave Harmon <k6xyz at sbcglobal.net> wrote:

  Hi Keith..

  Actually I DID take into account that there IS a possibility that the ESC could fail..but I feel the odds of that happening are as I said, a lot less than someone mishandling a transmitter.

  How about just plugging the battery in and putting the canopy on within the 3 minute starting period??

  The airplane should not have to just sit there plugged in and ready to go like a fueled up glow powered airplane..

  After landing someone picks up the model and turns off the radio switch..if the helper picks up the airplane and the ESC malfunctions he has ahold of it.

  I understand your and others concerns but I just don't think the external plug thing is necessary.  

  I just don't see the need to have a battery in the plane unless it is manually restrained and going to be flown within the next 3 minutes.

  I don't mean to imply that I plug in the battery without straddling the fuselage..I do!

  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 Black
  Sent: Sunday, February 12, 2012 4:29 PM

  To: General pattern discussion
  Subject: Re: [NSRCA-discussion] Arming Switch

  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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