[NSRCA-discussion] Arming Switch
John Gayer
jgghome at comcast.net
Mon Feb 13 14:17:53 AKST 2012
Keith
Tony advocated doing just that on RCU post #35:
http://www.rcuniverse.com/forum/m_10952866/anchors_10955113/mpage_2/key_/anchor/tm.htm#10955113
John Gayer
On 2/13/2012 3:45 PM, Keith Hoard wrote:
> Bob,
>
> OK, you're right, I thought you were talking about the transmitter.
> I couldn't imagine anyone wanting to turn off the receiver signal ON
> PURPOSE as a means to disarm an ESC. You're really relying on that
> firmware to do the right thing.
> Ya gotta treat these things like a loaded gun. What's the best Gun
> Control Law? Use both hands!!
>
> Keith Hoard
> Collierville, TN
>
> On Feb 13, 2012, at 16:12, Bob Richards <bob at toprudder.com
> <mailto:bob at toprudder.com>> wrote:
>
>> Keith,
>> Agree with everything you say, except your #2. I said that turning
>> off the "rx" (receiver) is not completely safe. Perhaps you thought I
>> said "transmitter". Turning off the receiver has nothing to do with
>> failsafe settings as the rx can't output ANYTHING including whatever
>> the "failsafe" setting may be. Some of the so called "arming
>> switches" included on some ESCs do nothing more than turn power off
>> to the rx, or disconnect the signal wire from the rx to the ESC. As
>> someone pointed out, this leaves the ESC open to possible
>> interference after it has been armed.
>> Bob R.
>>
>> --- On *Mon, 2/13/12, Keith Hoard /<khoard at gmail.com
>> <mailto:khoard at gmail.com>>/* wrote:
>>
>>
>> Bob,
>>
>> 1) So is leaving your canopy off with ESC plug displayed until
>> you are in the ready box. I'd argue that it is more visible AND
>> directly addresses the problem. Arming plugs are small and can
>> only be seen from one side of your airplane.
>> 2) That is a failsafe setting issue that an affect your airplane
>> any time the batteries are connected, even during a flight where
>> the disconnect device is useless. I agree with demonstrating
>> proper failsafe setup.
>> 3) Very true.
>>
>> What I don't agree with is the NSRCA issuing an "Airworthiness
>> Directive" ("AD" in FAA-speak) requiring me to install equipment
>> to address a /potential /problem when I can address that problem
>> in other ways. I think the Board would be much better off
>> proposing a rule defining WHAT outcome they are desiring, then
>> allowing the competitor to come up with an effective way to
>> accomplish that objective. I think we'd be better off adopting
>> the FAI rule that mandates when power can be connected to the
>> plane and let the competitor accomplish that objective in any
>> manner they wish, either through good battery management
>> techniques or disconnect devices.
>>
>> Besides, if you read the NSRCA rule proposal, all it says is
>> that you have to install a disconnect device. It does not
>> mandate when it will be utilized to arm or disarm the plane. So.
>> . . according to the rule, I can install the arming plug and
>> leave it connected at all times, thus not even solving the
>> original "problem".
>>
>> Keith Hoard
>> Collierville, TN
>> khoard at gmail.com
>> <http://us.mc1616.mail.yahoo.com/mc/compose?to=khoard@gmail.com>
>>
>>
>>
>>
>> On Mon, Feb 13, 2012 at 2:18 PM, Bob Richards <bob at toprudder.com
>> <http://us.mc1616.mail.yahoo.com/mc/compose?to=bob@toprudder.com>> wrote:
>>
>> Keith,
>> What you say it true.
>> What I have taken from this discussion:
>> 1) An arming plug is an externally visible indicator of
>> "ready and dangerous".
>> 2) Turning the rx off alone is not a completely safe
>> condition, and less so AFTER a flight.
>> 3) No safety measure is 100% infallible, simply due to human
>> error.
>> Regardless of how you render your aircraft safe, you still
>> have to remember to do it!!! People will forget, and that
>> unfortunately will happen regardless.
>> Bob R.
>>
>>
>> --- On *Mon, 2/13/12, Keith Hoard /<khoard at gmail.com
>> <http://us.mc1616.mail.yahoo.com/mc/compose?to=khoard@gmail.com>>/*
>> wrote:
>>
>>
>> Just how many airplanes have we seen fly out of caller's
>> hands at contests? Is this a widespread problem, or just
>> isolated to a couple contests? Why can't the caller
>> maintain positive control of the airplane until the owner
>> gets over to disconnect the battery? If the caller
>> and/or pilot are that distracted after a flight, what is
>> to keep them from forgetting to removing the arming plug?
>>
>> I think this is a solution wandering around looking for a
>> problem. If you can't remember to disconnect your
>> battery as soon as possible after a flight and to only
>> connect it just prior to flight then you won't remember
>> to use your arming plug to perform the same functions.
>>
>>
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