Today's Message Index:
----------------------
1. 05:24 AM - Re: FW: SKYMAP IIIC question (Gilles.Thesee)
2. 06:01 AM - no battery contactor? (j. davis)
3. 06:46 AM - Re: no battery contactor? (Robert L. Nuckolls, III)
4. 06:47 AM - Re: Dead Horses don't die... (Robert L. Nuckolls, III)
5. 06:50 AM - Re: Dead Horses don't die... (Robert L. Nuckolls, III)
6. 09:35 AM - GTX327 power switching (Erich_Weaver@URSCorp.com)
7. 03:07 PM - BNC angle adapter doesn't fit (Ken)
8. 07:36 PM - Matronics Email List Fund Raiser - November! (Matt Dralle)
Message 1
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| Subject: | Re: SKYMAP IIIC question |
--> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
Ivor, Kent,
Thank you for your help and your quick answer.
I'm passing on the info.
Thanks again,
Best regards,
Gilles
http://contrails.free.fr
> This is from my manual of last year, so should be current,
> Regards
> Ivor
>
>
> Anyone happen to have info concerning the wiring of the GPS BENDIX
> SKYMAP IIIC ?
>
Message 2
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| Subject: | no battery contactor? |
--> AeroElectric-List message posted by: "j. davis" <jd@lawsonimaging.ca>
Greetings...
I'm just wondering what the justification for eliminating a
battery contactor as per Z17 or Z-20?
Also, if the S700-2-10 split master type switch can be
replaced by a 2-3, per appendix Z, how should it be wired,
exactly?
Thanks...
--
Regards, J.
flying: Zenith STOL CH701/912 C-IGGY, 350 hrs.
building: Sonex #325, Jabiru 3300/6, 85% completed
+-------------------------------------------------------+
| J. Davis, M.Sc. | (computer science) |
| *NIX consulting, SysAdmin | jd at lawsonimaging.ca |
| c/o Brandywine Aviation | voice: 519.289.1527 |
| 5507 Irish Dr., Appin, ON | http://www.cleco.ca |
| N42 47.33 W081 36.50 31/13 | 2000+ x 60', elev: 740' |
+-------------------------------------------------------+
To most people the sky is the limit.
To those who love aviation, the sky is home.
Take charge of your attitude. Don't let someone else choose
it for you.
Message 3
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| Subject: | Re: no battery contactor? |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
At 08:59 AM 11/1/2006 -0500, you wrote:
>--> AeroElectric-List message posted by: "j. davis" <jd@lawsonimaging.ca>
>
>Greetings...
>
>I'm just wondering what the justification for eliminating a battery
>contactor as per Z17 or Z-20?
The engine drive power sources for a number of small
engines have limited output. The classic battery contactor
implementation consumes 0.7 to 1.0 amps for the
duration of flight. In most cases, there's energy-to-
burn while the main alternator is functioning but
for Rotax and Jabiru engines, this resource is small
(8-18 amps) and a builder may elect to avoid power
losses represented by the installation of a battery
contactor.
Indeed ANY airplane can use a manual switch in lieu
of a contactor . . . but recall that one of the design
goals for a contactor is that when the master switch
is OFF, the amount of hot wiring between battery and
battery switch is minimized.
>Also, if the S700-2-10 split master type switch can be replaced by a 2-3,
>per appendix Z, how should it be wired, exactly?
A 2-3 is not progressive transfer . . . so the battery
and alternator come on and off together. This presents
a problem for conducting battery-only ground ops
where an alternator might come alive even with the engine
not running and load the battery unnecessarily during
ground testing.
If you use a 2-3, the pulling the alternator field
breaker during ground ops takes the place of the
progressive transfer feature of the 2-10 where
the system can be alive on battery only.
Looking at the back of the switch, the 2-3 is
wired just like a 2-10.
Bob . . .
Message 4
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| Subject: | Re: Dead Horses don't die... |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
At 08:00 AM 10/27/2006 -0400, you wrote:
>In a message dated 10/27/2006 4:35:56 AM Central Daylight Time,
>khorton01@rogers.com writes:
>What sorts of problems can I anticipate due to
>the power handling issues? Do I need to have the radio OFF during
>start up and shut down?
>
> >>>>>>>>>
>"Radios ON/OFF" are checklist items for me- haven't seen any negative
>effects from radio yet when "OFF" item missed, but T2000 xpndr does seem
>to behave oddly if left on at shutdown. "No Comm" errors, turning itself
>on before Master shut off, difficult to turn on (occasionally requires
>several attemps holding power button in) but otherwise seems to work
>fairly well.
>
>My 760 transmits very well, but reception from maybe 20% of other aircraft
>(ATC and unicoms always come in well) typically with older radios, is
>garbled in varying degrees and on rare occasions almost
>non-existent. Haven't been able to resolve yet- curious if others
>experience this.
Hmmm. . . it would be really interesting to bench check
some of these "problem" radios. I think I'll put a nice
signal generator in my letter to Santa Claus.
> Close formation reception is often garbled- added resistor to antenna
> line as discussed here some time ago (thanks Bob!) helped quite a bit,
> but will upsize resistor at next opportunity & see if improves...
Let us know what size resistor you ultimately find adequate.
Thanks!
Bob . . .
Message 5
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| Subject: | Re: Dead Horses don't die... |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
Inquiry:
I have on order from an avionics installer a GNS430, SL30 and
GTX327- I wish to avoid a separate avionics bus and plan to power these
from my
endurance bus fuseblock, which is hot whenever the master contactor is on per
Bob Nuckolls' AeroElectric Connection system architecture. Is this
acceptable or must I make sure these units are not powered up during engine
start?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Interesting. The installation manuals for the GNS-430 and the
GTX-327 claim DO-160 Category A qualification for voltage spikes (I
don't have an SL-30 Installation manual to look at). Are they saying
that they don't trust their test results, or that they didn't really
do the test? Or that they think the real world might be worse than
the DO-160 requirements?
Kevin Horton RV-8 (finishing kit)
Ottawa, Canada
Funny you should ask. I've asked it dozens of
times over the years of various promulgators of
avionics master switches . . . I've yet to received
a reasoned reply.
Bob . . .
---------------------------------------------------------
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >
---------------------------------------------------------
Message 6
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| Subject: | GTX327 power switching |
--> AeroElectric-List message posted by: Erich_Weaver@URSCorp.com
When ordering my avionics, I noted which units had integrated power
switches and which did not, so I could include power switches for those
that didnt on my panel. For example, the GRT EFIS does not have a power
switch, so I installed one on the panel. The GTX 327 transponder does have
a power switch, so I did not include a switch for that. However, after
cutting my panel, installing the avionics and proceeding to flip various
switches to see that everything lights up, I have discovered that the GTX
327 comes on when I turn on the master, regardless of whether I turned the
unit off the last time I used it. So, if I want the unit off before engine
start, I will have to reach up and turn it off, when in my mind at least,
it should already be off because thats how I left it the last time I used
it. A minor inconvenience, but irritating to me, and I dont really want to
add another panel switch.
Does anyone know whether there is something in the GTX327 instrument set up
that will allow me to change the default setting to power off instead of
power on?
thank you
Erich Weaver
Message 7
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| Subject: | BNC angle adapter doesn't fit |
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Thought I'd mention that the BNC angle adapter that I had in stock would
not fit my TED transponder antenna. It's likely a low cost import
adapter. In fact though none of the angle adapters in two local stores
would push on far enough even though all the straight connectors that I
tried fit fine. A minor mystery as I have not been able to figure out
why they won't push on far enough despite being willing to do some surgery.
Wish I'd known sooner as I just received an order from Steinair today
and would have ordered one of theirs if I'd known mine wouldn't fit ;(
Ken
Message 8
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| Subject: | Matronics Email List Fund Raiser - November! |
--> AeroElectric-List message posted by: Matt Dralle <dralle@matronics.com>
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