Today's Message Index:
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0. 05:28 AM - Coming Soon - The List of Contributors - Please Make A Contribution Today! (Matt Dralle)
1. 05:20 AM - Re: Ground wire for LED lights (Robert L. Nuckolls, III)
2. 05:38 AM - Ray Allen Trim Servos and Garmin GAD 27 (Michael Easley)
3. 06:26 AM - Re: Ray Allen Trim Servos and Garmin GAD 27 (GTH)
4. 08:54 AM - Re: Ray Allen Trim Servos and Garmin GAD 27 (Robert L. Nuckolls, III)
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| Subject: | Coming Soon - The List of Contributors - Please Make |
A Contribution Today!
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Message 1
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| Subject: | Re: Ground wire for LED lights |
At 09:10 PM 11/4/2017, you wrote:
>
>Interesting. My Aveo nav/strobe LEDs are perfectly quiet in my Bose A20s.
>
>On 11/4/2017 8:03 PM, Rick Beebe wrote:
>>I agree, but fwiw I can hear my aeroled strobes in my headset. To
>>be fair I could hear the Whelan strobe they replaced and I re-used
>>the same wires. At some point I plan to investigate but it's not
>>obnoxious to make it a priority.
>>--Rick
Running a noise problem to ground is a bit like
playing the board game Clue . . . you sift through
the features of your airplane's configuration
more to eliminate answers than to confirm them.
Sometimes the answers pop up immediately, maybe
not.
You already have an antagonist . . . and sorta
have a victim. Chapter 17 of the 'Connection
http://tinyurl.com/pt97pha
describes the 'rules of the game' for sifting
clues. Only after your victim and propagation
pathway are discovered are you ready to effect
a remedy.
But as long as the Z-15 guidelines for grounding
are observed, the remedy will not be found
lurking in a ground-loop.
Bob . . .
Message 2
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| Subject: | Ray Allen Trim Servos and Garmin GAD 27 |
I have 4-way hat switches on my sticks. I've used both the RAC REL-2 Relay
Decks and later switched to a SafetyTrim for the elevator trim.
For reference.
Description of Relay Deck.
This device converts the momentary contact action of the ROS-4 4-way switch,
or any SPST pushbutton switch, into a DPDT action that is necessary to
operate Ray Allen servos.
Description of RAC Switch.
The RS2 rocker switch is designed to electrically short the actuator motor
to ground (-) when released. This stops the actuator motor without any
coasting, allowing precise positioning of the actuator.
The GAD 27, part of my G3X panel, is supposed to be a trim controller. I
does the mixing, variable speed control, etc., but I can't find any
reference to it working correctly with the RAC servos. So do I need relay
decks, or not? If so, where? Between the switches and the GAD 27, between
the GAD 27 and the autopilot servos, or between the autopilot servos and the
trim servos?
Thanks,
Mike
Message 3
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| Subject: | Re: Ray Allen Trim Servos and Garmin GAD 27 |
Le 05/11/2017 14:35, Michael Easley a crit :
>
> The GAD 27, part of my G3X panel, is supposed to be a trim controller.
> I does the mixing, variable speed control, etc., but I cant find any
> reference to it working correctly with the RAC servos. So do I need
> relay decks, or not? If so, where? Between the switches and the GAD
> 27, between the GAD 27 and the autopilot servos, or between the
> autopilot servos and the trim servos?
>
Mike and all,
FWIW, the Garmin G3X Install Manual v 5 states 5A current output for
each of the trim motors, see page 23.3.
Pages 24.9 through 27.11 show example wirings with direct stick switch
arrangement and no relay.
Also the RAC trim installation sheet shows a 1 A fuse or breaker.
So I think you should be OK with no relays. Of course once the system is
installed, a precautionary current measurement is in order.
What you didn't mention is whether you are using GSA28 A/P servos or not ?
Hope this helps,
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr
Message 4
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| Subject: | Re: Ray Allen Trim Servos and Garmin GAD 27 |
>
>So I think you should be OK with no relays. Of course once the
>system is installed, a precautionary current measurement is in order.
>What you didn't mention is whether you are using GSA28 A/P servos or not ?
The RAC actuators draw very low currents. I've seen
them powered with an array of AA alkaline cells with
YEARS of service. I think they draw about 100 mA.
Bob . . .
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