Today's Message Index:
----------------------
1. 11:21 AM - Re: GPS batteries drain (Dan Morrow)
2. 11:36 AM - AGM batteries question (Phil White)
3. 12:21 PM - Re: CHT update (Speedy11@aol.com)
4. 12:26 PM - GPS batteries drain (David LLoyd)
5. 01:49 PM - Re: GPS batteries drain (Sam Hoskins)
6. 06:34 PM - GPS batteries drain (Dennis Johnson)
7. 07:59 PM - Re: Lowrance database (user9253)
8. 09:16 PM - Can a 4awg cable be too short? (messydeer)
Message 1
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| Subject: | Re: GPS batteries drain |
I do in fact carry extra batteries in my flight bag.
Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 01:36 PM 11/24/2009, you wrote:
>> <danfm01@butter.toast.net>
>>
>> Sam Hoskins wrote:
>>
>> I also have a Garmin 196. For the last couple of years I've been
>> flying a rental plane that has dual Garmin 430's installed (O the
>> luxury!!). I carry the 196 around in the flight bag for a back up
>> but never turn it
>> on except occasionally to check the batteries. I still have to
>> replace the batteries once or twice a year. It may be because of an
>> internal clock that runs continuously. The clock helps it get an
>> initial satellite fix quicker.
>
> That's a reasonable supposition. Do you carry fresh batteries
> too? A flight-bag radio with uncertain energy in the batteries
> is not a very solid backup. See:
>
> http://www.aeroelectric.com/articles/AA_Bat_Test.pdf
>
>
> Bob . . .
>
> ---------------------------------------
> ( It's MATRONICS FUND RAISER MONTH! )
> ( Do your part to keep this marvelous )
> ( tool sharp and available to all our )
> ( brothers in the OBAM aviation )
> ( community. )
> ---------------------------------------
>
>
Message 2
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| Subject: | AGM batteries question |
I am building an RV with Mazda rotary engine that is electric-dependent,
so I will have 2 batteries, and probably 2 alternators. It came time to
purchase batteries, and I presumed I would use the Odyssey PC-680 16AHr
AGM units. A web search didn't find any bargains (lowest was $118 each,
if memory serves).
A search for AGM batteries led me to Gruber Power Systems, who make
an 18 AHr unit nearly identical in size and capacity to the Odyssey 680,
but only $42 each. I have purchased a pair, and am in process of
mounting and wiring them, but I wonder if anyone has experience with or
has tested Gruber batteries, or others like them, to determine if they
are well suited to aircraft use.
I did notice that the terminals are noticably thinner than what one
sees on the Odysseys, being a half inch tall and wide, but only 1/16"
thick protruding up from the battery top. Makes me wonder if these
batteries won't supply the high current needed for starting an engine,
only having long life in lower current demand applications.
Any experience you can share?
Phil in IL
Message 3
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Bill,
There are lots of possibilities with your situation, but a loose probe
would be the likely cause.
Are you running the P-Mags with the manifold pressure adjusted timing?
Are you using auto spark plugs? Did you check the wiring resistance for the
#4 cylinder? Are the plugs gapped correctly?
It's puzzling that one cylinder would drop that much.
Stan Sutterfield
Do not archive
I'll be troubleshooting a sudden discrepancy in CHT's over the holidays
that
cropped up shortly after the day I put my new P-mags on in place of the
older models - suddenly #4 is showing about 190* F when the other three are
still indicating within a few degrees of each other in the 350-380 range.
EGT's are all where they've always been for all 4 cylinders, and power
output, engine smoothness seem normal.
I'm guessing a bayonet probe has been jarred loose somehow or has failed,
but need to pull the cowl and have a closer look. Between an IR
thermometer
to scan the cylinders, and a cup of boiling water to dunk the probe in, I
hope I can determine whether the problem is with the probe and wiring, or a
cylinder that's actually too cold, for whatever reason.
I will let the list know what I find.
Bill B. /RV-6A O-320
Message 4
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| Subject: | GPS batteries drain |
...about spare cells, etc.
I use a "Sharpie" pen and write the date on spare cells like AA's. I also
date mark them when inserting into a device. Down the road, I don't have to
guess as to how old they are, and it gives me a good idea when to pitch
them.
Dave
__________________________________________
----- Original Message -----
From: "Dan Morrow" <danfm01@butter.toast.net>
Sent: Wednesday, November 25, 2009 11:04 AM
Subject: Re: AeroElectric-List: GPS batteries drain
> <danfm01@butter.toast.net>
>
> I do in fact carry extra batteries in my flight bag.
>
> Robert L. Nuckolls, III wrote:
>> <nuckolls.bob@aeroelectric.com>
>>
>> At 01:36 PM 11/24/2009, you wrote:
>>> <danfm01@butter.toast.net>
>>>
>>> Sam Hoskins wrote:
>>>
>>> I also have a Garmin 196. For the last couple of years I've been flying
>>> a rental plane that has dual Garmin 430's installed (O the luxury!!). I
>>> carry the 196 around in the flight bag for a back up but never turn it
>>> on except occasionally to check the batteries. I still have to replace
>>> the batteries once or twice a year. It may be because of an internal
>>> clock that runs continuously. The clock helps it get an initial
>>> satellite fix quicker.
>>
>> That's a reasonable supposition. Do you carry fresh batteries
>> too? A flight-bag radio with uncertain energy in the batteries
>> is not a very solid backup. See:
>>
>> http://www.aeroelectric.com/articles/AA_Bat_Test.pdf
>>
>>
>> Bob . . .
>>
>> ---------------------------------------
Message 5
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| Subject: | Re: GPS batteries drain |
Guys, I appreciate the help about maintaining good battery practices, but
that is not the issue here. The unit eats batteries when it is truned off,
and it never did it before I wired it into my panel.
I received a couple of off-line comments from another GPSMap196 use that are
very relevant:
Mine does this as well. I understand that the very last prom
> update addresses this- but I've not tried installing it. I know
> it works now, and I'd rather not trash the unit by attempting
> a download.
>
> However, I had the problem on my gps 196, and I noted that the
> change log pointed out that there was a known problem with
> the batteries draining when external power was cut.
>
> Addressed in Ver. 4.40, as of Oct 19, 2006 of the software.
>
> If that's the version you have, Then I guess the problem still
> exists, and I'm glad I didn't upgrade..
>
> I assume that it's part of the "switch to the other source" logic
> that attempts to keep the unit up and operational through the
> change from internal power to external, and back. It appears
> to shut down, but not all of it does. Since I changed the checklist, the
> problem went away. Prior to that, I was changing batteries on
> a regular basis. And.. one other thing to check for- I wiggle my
> lighter plug before power-up- I noted when the batteries were dead
> that sometimes I did not have a good contact in that plug- easy to
> see when there's no other power. I fly with a spare set of
> batteries, and a spare OLD gps unit that takes forever to acquire
> a signal. Before I knew about the drain and the lighter socket
> problem, I resorted to it once when the low level scattered
> suddenly went solid.. Nice to have the old-fashioned pointer
> to the home airport, as well as the distance. Nicer still
> to find a break in the overcast to let me back through!
> I had enough worries without trying to debug a suddenly blank GPS.
>
> Anyway- you might take a look at your software version, and let
> me know if you do the upgrade.
>
This sounds like the problem with my unit - only problem is, I upgraded the
software for my portable about two years ago.
I sent Garm's tech support a request for help, but nothing yet. This isn't
a big issue, but if Garmin sends a reply, I will be sure and pass it along.
Thanks.
Sam
On Tue, Nov 24, 2009 at 12:14 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com>
>
>
> At 10:49 AM 11/24/2009, you wrote:
> This is kind of a strange one. I have an old Garmin GPSmap 196. I recently
> wired it to my aircraft, including my Dynon Flightdek D180.
>
> The GPS 12V supply is wired to the ship endurance bus switch and seems
> normal. When I shut the ship's power down I get a GPS message that says
> something like "External power lost, push any button within 30 seconds to
> run on battery power". If I don't touch it, the GPS shuts down and the
> screen in blank, which is what I would expect.
>
> In spite of this, the internal AA batteries still wear down, even though
> the unit is turned off. Is it possible that the data leads that go to/from
> the Dynon can permit the batteries to drain? Any ideas what I might do to
> fix this? Thank you.
>
> No way to tell without an intimate working knowledge
> of the two devices. I have a TomTom One that I use in
> the car and its batteries will run down even tho the
> unit is turned off. I know it has an internal time-of-day
> clock that stays accurate even when turned off but
> that shouldn't take much power. I used to think perhaps
> it kept the GPS receiver alive when turn off. But it
> still takes significant time to stand up and navigate
> when turned on. Nonetheless, a fully charged internal
> battery is dead after sitting unused for about a week
> to 10 days.
>
> It would be interesting to do a current drain measurement
> on the batteries when in the various operating states.
> Can you operate it with the battery cover off? My TomTom
> is li-ion internal and you have to disassemble the thing
> to get at the battery for replacement. As a result, I've
> not been sufficiently victimized by curiousity to make
> the measurement.
>
> Bob . . .
>
> ---------------------------------------
> ( It's MATRONICS FUND RAISER MONTH! )
> ( Do your part to keep this marvelous )
> ( tool sharp and available to all our )
> ( brothers in the OBAM aviation )
> ( community. )
> ---------------------------------------
>
>
Message 6
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| Subject: | GPS batteries drain |
I also have a Garmin GPS 196. It says somewhere in that thick owner's
manual that it drains batteries even when turned off. Mine takes about
six months for the batteries to go dead. My only use for the 196 is to
backup my panel mount Chelton GPS, so dead batteries aren't acceptable.
In response, I removed the batteries and keep them in the airplane's
glove box. I wouldn't have bought the 196 for my application if I knew
it drained the batteries even when it was turned off.
Dennis
Lancair Legacy
Message 7
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| Subject: | Re: Lowrance database |
TH-SR wrote:
> Hi Jim,
>
> The last Jeppesen update issued by Lowrance for the AirMap 100 was Version
> 1.9, dated 6/27/02. It is available for download at their website.
>
> http://www.lowrance.com/Downloads/Product-Software-Updates/
>
> I'm not aware of any third party updates...
>
> Todd
> West Bend, WI
>
> ---
The update at lowrance.com is actually an operating system update for the Airmap
100, not the navdata. Navdata updates at lei-extras.com are not listed for
the Airmap 100 anymore. My last update was in 1999. Does anyone have a more
recent update? I believe the name of file is JEPPDATA.LOW
Thanks, Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=274839#274839
Message 8
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| Subject: | Can a 4awg cable be too short? |
Depending on the answer to this question, I might have been better off asking it
earlier. I have 4awg welding cable between my battery contactor and my starter
contactor. It's only 2" long, plus the ~1/2" crimped in each terminal. It fits
fine, but now that the lugs are crimped on, it's fairly stiff. In a shorter
wire or a longer section of this fat cable, I'd make them a little long. With
this 2" jobbie, there's no give. I could position the contactors so it puts
a little compression on the cable, or is this even necessary?
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=274844#274844
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