Today's Message Index:
----------------------
1. 04:39 AM - Portable Intercom (Jerald Folkerts)
2. 07:45 AM - Re: Alternator woes. (Robert L. Nuckolls, III)
3. 08:22 AM - Re: Portable Intercom (Robert L. Nuckolls, III)
4. 09:03 AM - Re: My toggle switch quest... (Robert L. Nuckolls, III)
5. 12:18 PM - LiFePo Battery (Guido von Allmen)
6. 12:59 PM - Re: Re: My toggle switch quest... (wynaire)
7. 01:48 PM - Re: Re: My toggle switch quest... (wynaire)
8. 03:05 PM - Re: Re: My toggle switch quest... (Robert L. Nuckolls, III)
9. 03:33 PM - Re: Re: My toggle switch quest... (Robert L. Nuckolls, III)
10. 03:37 PM - Re: Re: My toggle switch quest... (John Tipton)
11. 03:58 PM - Re: Re: My toggle switch quest... (Robert L. Nuckolls, III)
12. 05:22 PM - Re: Re: My toggle switch quest... (B Tomm)
13. 08:34 PM - Re: Re: My toggle switch quest... (Jared Yates)
14. 09:55 PM - Re: Re: My toggle switch quest... (Robert L. Nuckolls, III)
Message 1
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| Subject: | Portable Intercom |
Now that I'm starting to carry passengers in my non-electrical equipped
Cygnet, I need a good intercom. Currently, I use a push to talk switch with
my handheld I-COM radio, antenna mounted on the windscreen. I use a David
Clark headset and everything works great. Now, I need to go to some type of
battery powered voice activated intercom that I can also talk/listen to my
radio on. I would be interested in hearing what others have done and what
you believe is my best option.
Thank,
Jerry Folkerts
Message 2
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| Subject: | Re: Alternator woes. |
At 11:02 AM 7/4/2014, you wrote:
Bob.
If you could please comment on the following:
Allowing for a 0.7-0.9 volt drop across the diode from main to
endurance bus, I am measuring varying voltages on the endurance bus in flight.
What should be 13.5-13.7v to allow for the battery to be charged at
14.4v, I am finding voltages that vary from 12.2v to 13.5v at
constant cruise rpm.
Any idea for troubleshooting what is causing the voltage to vary so much?
Yes, as Joe has noted, these voltages are consistent
with intermittent alternator function. 13.6 on the
e-bus is consistent with alternator operating, 12.2
says the alternator is inoperative and you're running
battery only.
Checking the voltage on the main bus, but now on the ground, I am
seeing voltages that vary with engine rpm, 550 rpm at idle to
2200rpm, of 14.06v to 14.22v respectively.
Is this variance within tolerances of the LR3C regulator? I had
expected that the regulator would keep the voltage within a tighter range.
Yes, we COULD design for tighter regulation
but there's a risk of unstable operation over
the full constellation of system variables.
a plus or minus variation about the center
of your set-point over variations in load
is expected and acceptable.
As an aside, I am experiencing a strange anomoly that sometimes when
I transmit the transponder turns itself off. Both are Garmin
products, GNS530 and GTX330, and are powered from the endurance bus.
Where is your comm antenna located and what
kind of antenna is it?
Comments invited please.
It is unfortunate that these woes come and go and I'd really like to
cure them once and for all.
Aircraft is Long-EZ using an "all electric airplane on a budget"
architecture, with all B and C equipment, 60A alternator, SD-8 dynamo
and 32AH battery.
Your second problem has the 'smell' of an
RF overload due to strong fields in the
cockpit. This is of particular risk in
a plastic airplane.
Bob . . .
Message 3
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| Subject: | Re: Portable Intercom |
Now that I'm starting to carry passengers in my non-electrical
equipped Cygnet, I need a good intercom. Currently, I use a push to
talk switch with my handheld I-COM radio, antenna mounted on the
windscreen. I use a David Clark headset and everything works great.
Now, I need to go to some type of battery powered voice activated
intercom that I can also talk/listen to my radio on. I would be
interested in hearing what others have done and what you believe is
my best option.
There are dozens of perfectly adequate intercoms
with variable noise squelch adjustments. The CRITICAL
quality for intercom performance is the noise-cancelling
ability of your microphones. The WORSE they are, the
tighter the squelch setting and POORER signal to
noise ratio when you talk.
David Clark has been a kind of benchmark for
headset performance . . . but there are some
really low priced products that work well too.
Telex Echelons used to be a brand that I fitted
into our J3 at 1K1 . . . and have two pairs
in my flight bag. I think I gave about $125
a pair for them . . . in 1990 . . . but they
were about half the price of David Clarks.
There are some excellent buys in portable
intercoms on eBay . . . here's just one
http://tinyurl.com/kdq9z4o
the short path to satisfactory intercom
performance is to us the SAME model headset
for both slots . . . You'll want similar
if not identical microphones to maximize
probability of success. Mix-match headsets
are not automatically problematic but it
does add another variable that may tax
your $time$.
Bob . . .
Message 4
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| Subject: | Re: My toggle switch quest... |
At 09:09 AM 7/4/2014, you wrote:
>Hi Bob,
>
>I'm searching for a two-position, momentary, DPDT, full size (panel
>mount, ideally with tab terminations but screws would be fine too)
>toggle switch and I have been unable to find one from Carling or others.
>
>Do you know of a source? Is it in the Carling catalog and I'm just
>not seeing it? I'm having trouble believing it's not readily
>available but I'm just not seeing it...
The Carling catalog is a convoluted thing . . . but
yes . . . what you want is in there.
Emacs!
The part number works out to be 6GL5B-73 which you can find in
the top item listed at:
http://tinyurl.com/qyb4ck8
They have 94 in stock
Bob . . .
Message 5
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Hello Bob and who it may concerne,
I am quite new to this group. I recently bought in Friedrichshafen at
the Aero 2014 a new LiFePo battery from AeroAkku ( model LFP450 D
Starter Battery for Lyc 0-320 ) The vendor told me that these
batteries are built with A123 Systems elements APR 18650M1. Do you
know this product ( it looks like a german assembly ) and has someone
of this list some or even extended experience with this type of
battery in general aviation especially concerning how to recharge and
reliability.
Thanks in advance
Guido
Message 6
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| Subject: | Re: My toggle switch quest... |
Thanks for the info, fellows. Timely, as usual! Just the place I needed
to search for a replacement flap-switch for the yet unfinished [but
close?] LNC2 dream-machine. Now to find the paddle-tab. Interesting how
age becomes a threat to finishing, versus inspiration...
Mike
----- Original Message -----
From: Robert L. Nuckolls, III
To: Steve Stearns ; aeroelectric-list@matronics.com
Sent: Sunday, July 06, 2014 10:00 AM
Subject: AeroElectric-List: Re: My toggle switch quest...
At 09:09 AM 7/4/2014, you wrote:
Hi Bob,
I'm searching for a two-position, momentary, DPDT, full size (panel
mount, ideally with tab terminations but screws would be fine too)
toggle switch and I have been unable to find one from Carling or others.
Do you know of a source? Is it in the Carling catalog and I'm just
not seeing it? I'm having trouble believing it's not readily available
but I'm just not seeing it...
The Carling catalog is a convoluted thing . . . but
yes . . . what you want is in there.
The part number works out to be 6GL5B-73 which you can find in
the top item listed at:
http://tinyurl.com/qyb4ck8
They have 94 in stock
Bob . . .
Message 7
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| Subject: | Re: My toggle switch quest... |
----- Original Message -----
From: wynaire
To: aeroelectric-list@matronics.com
Sent: Sunday, July 06, 2014 1:58 PM
Subject: Re: AeroElectric-List: Re: My toggle switch quest...
Thanks for the info, fellows. Timely, as usual! Just the place I
needed to search for a replacement flap-switch for the yet unfinished
[but close?] LNC2 dream-machine. Now to find the paddle-tab. Interesting
how age becomes a threat to finishing, versus inspiration...
Mike
----- Original Message -----
From: Robert L. Nuckolls, III
To: Steve Stearns ; aeroelectric-list@matronics.com
Sent: Sunday, July 06, 2014 10:00 AM
Subject: AeroElectric-List: Re: My toggle switch quest...
At 09:09 AM 7/4/2014, you wrote:
Hi Bob,
I'm searching for a two-position, momentary, DPDT, full size
(panel mount, ideally with tab terminations but screws would be fine
too) toggle switch and I have been unable to find one from Carling or
others.
Do you know of a source? Is it in the Carling catalog and I'm
just not seeing it? I'm having trouble believing it's not readily
available but I'm just not seeing it...
The Carling catalog is a convoluted thing . . . but
yes . . . what you want is in there.
The part number works out to be 6GL5B-73 which you can find in
the top item listed at:
http://tinyurl.com/qyb4ck8
They have 94 in stock
Bob . . .
Message 8
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| Subject: | Re: My toggle switch quest... |
At 03:47 PM 7/6/2014, you wrote:
>
>----- Original Message -----
>From: <mailto:wynaire@citlink.net>wynaire
>To: <mailto:aeroelectric-list@matronics.com>aeroelectric-list@matronics.com
>Sent: Sunday, July 06, 2014 1:58 PM
>Subject: Re: AeroElectric-List: Re: My toggle switch quest...
>
>Thanks for the info, fellows. Timely, as usual! Just the place I
>needed to search for a replacement flap-switch for the yet
>unfinished [but close?] LNC2 dream-machine. Now to find the
>paddle-tab. Interesting how age becomes a threat to finishing,
>versus inspiration...
See http://tinyurl.com/kqd8d4u for DIY paddle-tab
for flap switches. Is the switch you're looking for
intended to operate flaps? The 3-position, dpdt,
on-off-(on) is usually selected for this task. You
described a two position on-none-(on).
Are you sure you don't want the 3-position? That
would be a 6GM5B-73
Do a google search on carling 6gm5b-73 . . . lots
of folks stock this one too.
Bob . . .
Message 9
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| Subject: | Re: My toggle switch quest... |
Found this tabulation of Carling switches that makes it a bit
easier to identify a part number for our favorite series of
swtiches.
Emacs!
Bob . . .
Message 10
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| Subject: | Re: My toggle switch quest... |
Or: http://www.aerosportproducts.com/flapswitch.htm
Sent from my iPad
----x--O--x----
> On 6 Jul 2014, at 11:04 pm, "Robert L. Nuckolls, III" <nuckolls.bob@aeroel
ectric.com> wrote:
>
> At 03:47 PM 7/6/2014, you wrote:
>>
>> ----- Original Message -----
>> From: wynaire
>> To: aeroelectric-list@matronics.com
>> Sent: Sunday, July 06, 2014 1:58 PM
>> Subject: Re: AeroElectric-List: Re: My toggle switch quest...
>>
>> Thanks for the info, fellows. Timely, as usual! Just the place I needed t
o search for a replacement flap-switch for the yet unfinished [but close?] L
NC2 dream-machine. Now to find the paddle-tab. Interesting how age becomes a
threat to finishing, versus inspiration...
>
> See http://tinyurl.com/kqd8d4u for DIY paddle-tab
> for flap switches. Is the switch you're looking for
> intended to operate flaps? The 3-position, dpdt,
> on-off-(on) is usually selected for this task. You
> described a two position on-none-(on).
>
> Are you sure you don't want the 3-position? That
> would be a 6GM5B-73
>
> Do a google search on carling 6gm5b-73 . . . lots
> of folks stock this one too.
>
>
>
>
> Bob . . .
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
Message 11
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| Subject: | Re: My toggle switch quest... |
At 05:36 PM 7/6/2014, you wrote:
>Or:
><http://www.aerosportproducts.com/flapswitch.htm>http://www.aerosportproducts.com/flapswitch.htm
>
>Sent from my iPad
Good find . . . OOPS . . .just remembered.
If you're going to do a DIY flap switch,
you need a toggle switch with a captive
handle. It needs to pivot on a shaft so
that the flap tab stays oriented horizontally.
The Carling switches have ball-joints on their
metal 'bat' handles and will spin.
The Microswitch part for this application is
a 2TL1-5
http://tinyurl.com/n67zy9z
. . . which is a bit pricey . . . the prefab
assembly from aero sport products starts
looking like a pretty good deal.
Bob . . .
Message 12
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| Subject: | Re: My toggle switch quest... |
Is that flap looking like switch a requirement for certified aircraft? I
never really understood why one would pay so much for a switch that "sort"
of looks like a flap. In fact, the first few airplanes I flew had them but
I never really thought of it as looking like a flap. It's just what flap
switches look like. I guess I'm not the sharpest knife in the drawer.
BTW, Does this mean there are meanings for the shapes of the pitch and
mixture knobs too? About to feel even dumber.
Bevan
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Sunday, July 06, 2014 3:58 PM
Subject: Re: AeroElectric-List: Re: My toggle switch quest...
At 05:36 PM 7/6/2014, you wrote:
Or: http://www.aerosportproducts.com/flapswitch.htm
Sent from my iPad
Good find . . . OOPS . . .just remembered.
If you're going to do a DIY flap switch,
you need a toggle switch with a captive
handle. It needs to pivot on a shaft so
that the flap tab stays oriented horizontally.
The Carling switches have ball-joints on their
metal 'bat' handles and will spin.
The Microswitch part for this application is
a 2TL1-5
http://tinyurl.com/n67zy9z
. . . which is a bit pricey . . . the prefab
assembly from aero sport products starts
looking like a pretty good deal.
Bob . . .
Message 13
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| Subject: | Re: My toggle switch quest... |
I figured the pointy bits on the mixture knob were there to remind me of
pointy flames, while the rounded bits on the prop knob were there to remind
me of what most prop tips look like when they aren't shortened. Maybe
that's just me imprinting my own meaning though. I suppose it doesn't
matter what the shapes actually are, as long as they are different enough
that I can identify them by feel.
On Sun, Jul 6, 2014 at 8:21 PM, B Tomm <fvalarm@rapidnet.net> wrote:
> Is that flap looking like switch a requirement for certified aircraft?
> I never really understood why one would pay so much for a switch that
> "sort" of looks like a flap. In fact, the first few airplanes I flew had
> them but I never really thought of it as looking like a flap. It's just
> what flap switches look like. I guess I'm not the sharpest knife in the
> drawer.
>
> BTW, Does this mean there are meanings for the shapes of the pitch and
> mixture knobs too? About to feel even dumber.
>
> Bevan
>
Message 14
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| Subject: | Re: My toggle switch quest... |
At 07:21 PM 7/6/2014, you wrote:
>Is that flap looking like switch a requirement for certified
>aircraft? I never really understood why one would pay so much for a
>switch that "sort" of looks like a flap. In fact, the first few
>airplanes I flew had them but I never really thought of it as
>looking like a flap. It's just what flap switches look like. I
>guess I'm not the sharpest knife in the drawer.
>
>BTW, Does this mean there are meanings for the shapes of the pitch
>and mixture knobs too? About to feel even dumber.
Yes, attention has been paid to human factors
in cockpit design and layout since day-one . . .
although the earliest efforts just made sure
the pilot could reach the rudder pedals.
Since the Wright brother's days, the list
of noteworthy concerns has grown both
as a matter of policy and regulation. Same
thing goes on with cars and other machines.
The list of 'good things to do' necessarily
includes controls for shape, colors, locations
and forces needed to operate them.
Bottom line is that while not required for
your OMAM aircraft, it's a good thing not
to depart greatly from legacy cockpit
design philosophies . . . if only to make
your airplane less risky for the next pilot
who owns it.
Somewhere in the archives I have a copy of
the cert plan for a couple of airplanes.
They are lengthy documents and touch on
hundreds of things seldom considered in
OBAM aircraft. I'll see if I can find
one and publish . . . interesting reading.
Bob . . .
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