Today's Message Index:
----------------------
1. 01:21 AM - Re: MAC/Ray Allen trim actuator connections (Peter Pengilly)
2. 07:44 AM - Re: MAC/Ray Allen trim actuator connections (Robert L. Nuckolls, III)
3. 09:20 AM - "Contactor Questions" now CONTACTOR AUTOPSY (Bob Verwey)
4. 04:01 PM - Re: Garmin GTR 200 Help Needed (farmrjohn)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | MAC/Ray Allen trim actuator connections |
Transition away from 26 gauge as soon as possible and use a 9 pin D-sub as a
connector
Solder the 26g wires from the servo and then crimp 22g for the rest of the
run.
Peter
From: owner-aeroelectric-list-server@matronics.com
<owner-aeroelectric-list-server@matronics.com> On Behalf Of Tom Barter
Sent: 11 June 2021 23:22
Subject: AeroElectric-List: MAC/Ray Allen trim actuator connections
Greetings,
I'm in the process of installing an MAC/Ray Allen trim actuator, and am
wondering what the best way is to connect the five 26 gauge leads coming out
of the actuator to the corresponding 26 gauge five wire control cable that
will be routed up to the cockpit. The company used to offer a small, round
pin connector for that purpose, but not any more. Would like to be able to
disconnect the actuator rather than cut solder joints, if possible. Any
suggestions for a connector for fine wires like that appreciated.
Tom Barter
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai
gn=sig-email&utm_content=emailclient&utm_term=icon>
Virus-free.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai
gn=sig-email&utm_content=emailclient&utm_term=link> www.avast.com
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: MAC/Ray Allen trim actuator connections |
At 11:04 PM 6/11/2021, you wrote:
>For those tiny wires I like to use crimp-type
>D-sub pins and sockets.=C2 Stagger the joints and
>heat-shrink each one, then heat-shrink all
>five.=C2 They don't need to be in a housing. It
>makes a fairly=C2 small and
>manageable=C2 bulge.=C2 I think Bob has a write-up on this technique.
The last frame of this comic-book describes
this technique:
https://tinyurl.com/c5v2xvm
. . . and yes, those 26AWG leads are of questionable
design integrity. I've spoken with Ray-Allen folks
at OSH about this numerous times 20+ years ago
only to be rebuffed. So be it. It's their product.
But anything less than 22AWG wire in the airframe
bundles only increases fabrication labor and risk,
it's not good practice in the GA industry.
Raytheon-Beech DID use quite a bit of 24AWG wire
in Model 390 airframe bundles. Assembly line folks
hated the stuff but it DID save some weight in a very
complex airplane (Premier). For our purposes
any benefits secured by the use of tiny wires
are washed out by degradation of robustness.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | "Contactor Questions" now CONTACTOR AUTOPSY |
So there I am rummaging thru 30 years worth of things I kept in case I need
them...hhhhmmmm
So a contactor ends up in my grubby paws, and I decide to strip it, 'cause
that's what BN would do! lol
It does not look great at first glance ( easily opened BTW by drilling out
the tiniest of rivets; something I suspect you will not be able to do with
a recently manufactured device).
[image: 1.PNG]
The upper part of the housing is surprisingly clean, and the pic makes the
contacts look worse than they are.
[image: 3.PNG]
Wear patterns on the contacts are clearly visible, but what I noticed is
that with the factory assembly process, the contacts are slightly off the
horizontal, so the plane of contact is not parallel with the contact
disc....accidental? I think not..when you tighten the outer nut the contact
turns until it hits the coil housing, unless you wedge something in there
to prevent turning.
[image: 4.PNG]
The contact disc is remarkably evenly worn on the other side (contact
side), as if the whole thing rotates in service..whoda thunk!!
It appears to be a starter contactor based on the 3 ohm coil.
This is the cleaned up contact disc, cleaned with a nylon brush and solvent
.
[image: image.png]
and I rotated the contacts
[image: image.png]
Being the miserly type, I might just be forced to press it into service if
it tests OK.
Best Regards,
Bob Verwey
082 331 2727
On Mon, 24 May 2021 at 19:02, Bob Verwey <bob.verwey@gmail.com> wrote:
> Thanks for the responses to my query....I now have the right solution.
> Any recommendations as to how to tie this receptacle into the schematic?
>
> [image: image.png]
>
> More specifically the polarity relay that is indicated.
>
> Best Regards,
> Bob Verwey
> 082 331 2727
>
>
> On Sun, 23 May 2021 at 19:20, Robert L. Nuckolls, III <
> nuckolls.bob@aeroelectric.com> wrote:
>
>> At 11:57 PM 5/19/2021, you wrote:
>>
>> This is kinda related to contactors...
>>
>> On the BD4 that I am rebuilding, the battery is behind the baggage
>> compartment, with a really fat wire running up to the firewall.=C3=82
>>
>> IO 470 engine so lots of amps required for start.
>>
>> Is there a recommended contactor placement/battery disconnect=C3=82 prot
ocol
>> out there?
>> I'm thinking safety in the event of an incident which might short out th
e
>> fat wire to the fuselage.
>>
>>
>> Battery contactor located as close as practical
>> to battery; starter contactor as close as practical
>> to starter. FAT wire connects battery contactor
>> to starter contactor and main bus feeder.
>>
>>
>>
>> Bob . . .
>>
>> Un impeachable logic: George Carlin asked, "If black boxes
>> survive crashes, why don't they make the whole airplane
>> out of that stuff?"
>>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Garmin GTR 200 Help Needed |
Update-I used the headset and mike switch from the passenger side and all was normal.
However, I didn't not swap headsets and will try that next. Both headsets
are the same make and model, non-noise reducing style.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502352#502352
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|