Today's Message Index:
----------------------
1. 06:13 AM - Re: AeroElectric-List Digest: 2 Msgs - 12/15/16 (Bill Schertz)
2. 06:56 AM - Airport Courtesy Cars App Closing? (gbrasch)
3. 07:33 AM - Re: Re: AeroElectric-List Digest: 2 Msgs - 12/15/16 (Robert L. Nuckolls, III)
4. 07:48 AM - Re: Stratux position data (rampil)
Message 1
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Subject: | Re: AeroElectric-List Digest: 2 Msgs - 12/15/16 |
I don't think you need a machine shop. Hardware store has bronze 'oillite'
bearings in different shaft sizes, that can be epoxied into a bulkhead. Then
some use of Aluminum angle to mount the pot.
Bill Schertz
-----Original Message-----
From: AeroElectric-List Digest Server
Sent: Friday, December 16, 2016 12:59 AM
Subject: AeroElectric-List Digest: 2 Msgs - 12/15/16
*
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AeroElectric-List Digest Archive
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Total Messages Posted Thu 12/15/16: 2
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Today's Message Index:
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1. 09:50 AM - Re: Trim position indicator (Robert L. Nuckolls, III)
2. 07:00 PM - Re: Trim position indicator (donjohnston)
________________________________ Message 1
_____________________________________
Time: 09:50:13 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Subject: Re: AeroElectric-List: Trim position indicator
At 06:51 PM 12/13/2016, you wrote:
>how about a servo potentiometer geared to the idler pulley
>
>On Dec 13, 2016, at 19:30, Matt Dralle
><<mailto:dralle@matronics.com>dralle@matronics.com> wrote:
>
>
I've been mulling this over the past few days.
Had to spend a lot of time on the road . . . good
opportunity for sifting the seeds of ideas.
That idler pulley seems the opportune
location for tapping into trim system position
data. With a little creating work on a small
lathe, you could remount that pulley on
a shaft supported by a bushing extending
through the mounting surface. Is there room
behind that bulkhead to mount a potentiometer?
It seems likely that full stroke travel of
the trim system will not produce more than 10
revolutions of the idler pulley. The pot
would be rigged to produce 50% of full scale
voltage with the trim system mechanically
neutral.
Simple electronics can offer electrical adjustment
of the pot voltage should mechanical neutral be
offset from aerodynamic neutral.
If you had a voltage representing trim postion,
where/how would you display it?
Bob . . .
________________________________ Message 2
_____________________________________
Time: 07:00:32 PM PST US
Subject: AeroElectric-List: Re: Trim position indicator
From: "donjohnston" <don@velocity-xl.com>
nuckolls.bob(at)aeroelect wrote:
> At 06:51 PM 12/13/2016, you wrote:
>
> That idler pulley seems the opportune location for tapping into trim
> system position
data. With a little creating work on a small lathe, you could remount
that pulley on a shaft supported by a bushing extending through the
mounting
surface. Is there room behind that bulkhead to mount a potentiometer?
>
> Bob . . .
Yes, that would be an elegant solution. There's plenty of room on the
forward
side of the bulkhead. However, I don't have access to a machine shop. :(
The position data would be sent to the VPX. It has inputs that can handle
the Ray
Allen position sensors which then displays it on the GRT HXr EFIS.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=463960#463960
Message 2
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Subject: | Airport Courtesy Cars App Closing? |
IMPORTANT! If you are a user of the app version of Airport Courtesy Cars, please
view it for an important message about the possible closure of the app, or view
the page here:
https://www.airportcourtesycars.com/app-status.html
--------
Glenn Brasch
RV-9A Flying
Medevac Helicopter Pilot (Ret)
Owner, "Airport Courtesy Cars" Smart Phone App
and www.airportcourtesycars.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=463970#463970
Message 3
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Subject: | Re: AeroElectric-List Digest: 2 Msgs - 12/15/16 |
At 08:11 AM 12/16/2016, you wrote:
><wschertz343@gmail.com>
>
>I don't think you need a machine shop. Hardware store has bronze
>'oillite' bearings in different shaft sizes, that can be epoxied
>into a bulkhead. Then some use of Aluminum angle to mount the pot.
Agreed . . . 'jeeping' a pot onto the
idler shaft is just a matter of noodling
through the mechanical tinker-toya. Given
that the sensor is a plain-jane potentiometer,
you can probably connect it directly into
the trim signal input of the EFIS assuming
that it probably expects a signal bounded
by zero and 5 volts. There may even be
a 5v output from the EFIS that can be tapped
to excite the pot.
Does your idler pulley have a bearing built
in or is it a pulley with set-screw or other
fastener designed to mount directly to a
shaft. Assuming the latter, can you acquire
one that attaches to a shaft?
Bob . . .
Message 4
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Subject: | Re: Stratux position data |
The Stratux is a wireless software package and does not offer "pins".
More specifically, some of the Rasp Pi modules do have USB ports.
You did not say which ELT you have or what the exact specs are it needs
for GPS input. Many need RS232 serial, a 50 year obsolete protocol.
That's not to say that you can't alter the software to use a USB
port to output GPS strings. But then you would need an ELT that
talks USB.
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464028#464028
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