[NSRCA-discussion] How to safely arm/disarm your motor packs?

Sun Feb 22 14:20:39 AKST 2015

I use an arming plug. It is the third and absolute level of safety in a properly setup system. When my caller pulls the plug before picking up the airplane he is assured that there is nothing I can do from the transmitter accidently or otherwise, or any electronic failure will cause the motor to run unexpectedly.
Jim

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ford via NSRCA-discussion
Sent: Sunday, February 22, 2015 2:46 PM
To: Atwood, Mark
Cc: General pattern discussion
Subject: Re: [NSRCA-discussion] How to safely arm/disarm your motor packs?

I have external bullets hanging out in the breeze...works great. I use the Jeti bullets with "lip resistors" and eliminate the spark snap.

J

Sent from my iPhone

On Feb 22, 2015, at 17:39, Atwood, Mark <atwoodm at paragon-inc.com> wrote:
I completely agree with "seeing" the disconnect.  Depending on one circuit to protect another seems folly.  BUT... An arming plug does NOT allow you to SEE that the battery is disconnected. Period.  It's one of the reasons that the rule didn't pass the committee.  Exterior bullets are better... But you still can't see that the battery is disconnected without opening the canopy and seeing the battery.  

Sent from my average intelligence  phone 

On Feb 22, 2015, at 5:34 PM, John Ford via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
I've seen too many "radio arming" incidents in my day...
If I was CD'ing a contest, I'd need to trust that 20 pilots with 15 different radios, and 20 different planes, have radios that are all 100% reliable, using proprietary devices that are 100% correctly designed, and that all 20 pilots have applied 100% proper expertise to programming the radios and setting up the devices. 
If I am 5% wrong on  any of the above, someone on my flight line is at risk of ending the day at the ER.

I agree with the Nats line Chiefs..."I need to see your disconnect, or you can't fly on my line".

J

Sent from my iPhone

On Feb 22, 2015, at 17:15, David Harmon via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
+ several on that from me.

David Harmon
Sperry, OK

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Daniel Dupont via NSRCA-discussion
Sent: Sunday, February 22, 2015 4:04 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] How to safely arm/disarm your motor packs?

Hello,

I don’t used one and will never do unless it become a rule…..theres no reason to use one, instead I have a throttle that has a safety switch assigned to on my Jeti radio, and that lock the throttle to no output and my radio will not even power up unless that switch and others are in a safe position, determined by me which I do program on all my planes even the jet/edf planes.

As far as connection with a 10S or more….I used Power Pole connector and see no problems with them connecting directly.

To me a arm/disarm switch/connector is just another possible point of failure and I try to keep them at the minimum in my setup.

Regards

Daniel on MacBook Pro

From: lucky macy via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
Reply-To: lucky macy <luckymacy at hotmail.com>, General pattern discussion <nsrca-discussion at lists.nsrca.org>
Date: Sunday, February 22, 2015 at 2:11 PM
To: "nsrca-discussion at lists.nsrca.org" <nsrca-discussion at lists.nsrca.org>
Subject: [NSRCA-discussion] How to safely arm/disarm your motor packs?

 Hope the title isn't confusing nor do I wish to start any kind of philosophical 'war' on pit area safety, etc.

I hear there are 10S pattern setups that don't use an external arming plug.  That seems unsafe to me to have the batteries connected to the motor without an external physical circuit breaker but I'm probably overlooking some capability that can be set up using a Futaba 14MZ.  With the advanced planes that are a little awkward to a carry around armed and where the hatch has to be screwed into the fuse for extra canalyzer security it seems like an accident waiting to happen this way.

So for those that know how to relatively safely set this up could you pass on the formula?  My new Mythos doesn't have an external arming plug and I'm beginning to think I made a mistake.

thx,
lucky
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