Today's Message Index:
----------------------
1. 06:26 AM - Standard mags: Lycoming (John M Tipton)
2. 07:21 AM - Re: Standard mags: Lycoming (donjohnston)
3. 07:24 AM - Re: Smoker GFCI question (user9253)
4. 07:31 AM - Re: Battery Contactor Location (user9253)
5. 12:15 PM - Re: PC board fabrication (Goodw1n)
6. 03:21 PM - Re: Smoker GFCI question (Charlie England)
7. 03:34 PM - Re: Standard mags: Lycoming (Alec)
8. 03:37 PM - Re: Transponder and/or ADSB Antenna Installation and Radiation (Sebastien)
9. 03:44 PM - Re: Re: Smoker GFCI question (Art Zemon)
10. 03:49 PM - Re: Standard mags: Lycoming (Jared Yates)
11. 04:25 PM - Z11 field supply circuit protection (draker)
12. 05:26 PM - Re: Standard mags: Lycoming (Charlie England)
13. 06:51 PM - Re: Z11 field supply circuit protection (user9253)
14. 07:22 PM - Re: Z11 field supply circuit protection (Charlie England)
15. 07:57 PM - Re: Z11 field supply circuit protection (johnbright)
16. 08:27 PM - Re: Transponder and/or ADSB Antenna Installation and Radiation (Charlie England)
17. 11:28 PM - Re: Z11 field supply circuit protection (Robert L. Nuckolls, III)
Message 1
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| Subject: | Standard mags: Lycoming |
Hi Guys
With 'standard' mags as supplied by Lycoming, and an RV9a with ACS Key switch WITHOUT
starter position and using 'push switch' to operate starter, should the
engine be started on LEFT MAG ONLY.
John
PS: Aircraft Spruce photo: copyright acknowledged
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497432#497432
Attachments:
http://forums.matronics.com//files/electrical_ignition_switches_acs_keyed_ignition_switches_1_108.jpg
Message 2
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| Subject: | Re: Standard mags: Lycoming |
You want to start on the mag with the impulse coupling. On most engines, that
would be the left mag. But you should check to make sure.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497433#497433
Message 3
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| Subject: | Re: Smoker GFCI question |
The length of the cord is most likely the problem. A longer cord has
more capacitance which allows a few more milliamps to leak to ground.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497434#497434
Message 4
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| Subject: | Re: Battery Contactor Location |
As long as that battery box is securely bolted down so that it will not
break loose in a crash, then there is nothing to worry about.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497435#497435
Message 5
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| Subject: | Re: PC board fabrication |
Hey, there are a lot of companies that are doing such a job. It is not hard to
make a click on Google and to find a good team. As others said, there are good
prices and bad quality, and there are big prices and good quality, it depends
only one you. It is like finding a good software optimizer, there are best pc
optimizer, there are also the worst pc optimizer, it depends on how much you
are ready to pay. Good luck to you!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497436#497436
Message 6
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| Subject: | Re: Smoker GFCI question |
Good point! I haven't had to buy a gfi since the new stuff came out=2E
http
s://www=2Egoogle=2Ecom/search?client=ms-android-google&sxsrf=ALeKk03WmQ
rYXzER-XzhWixqNY56dEw4OA%3A1595765931111&ei=q3QdX834BfC3ggf5p5_gAw&q=gf
ci+arc+fault+outlet&oq=gfci+arc+fault+outlet&gs_lcp=ChNtb2JpbGUtZ3dzLXd
pei1zZXJwEAEYADICCAAyBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIGCAAQFhAeMg
YIABAWEB4yBQghEKABOgQIABBHOgQIABBDUMFMWKVtYLyDAWgAcAF4AIABtAGIAZsIkgEDMC43m
AEAoAEBwAEB&sclient=mobile-gws-wiz-serp
=81=A3Sent from BlueMail
=8B
On Jul 26, 2020, 12:39 AM, at 12:39 AM, ashleysc@broadstripe=2Enet
wrote:
>Hi Art Z;
>There's a good possibility that it's the circuit breake
r that is
>causing the problem=2E Newer style circuit breakers are very sen
sitive to
>arcing, even very insignificant arcing such as caused by a switc
h or
>thermostat=2E My neighbor brought over a heater that he used in a fru
it
>dryer=2E It was tripping circuits in his new house=2E After taking it a
part
>and finding nothing wrong, we plugged it in at my home, and it ran
>f
ine=2E We have older circuit breakers=2E So he took it home, changed one
>o
f his circuit breakers to the older style, and the problem
>disappeared=2E
>Cheers! Stu=2E=2E
>
>----- Original Message -----
>
>From: "Art Zemon" <
art@zemon=2Ename>
>To: aeroelectric-list@matronics=2Ecom
>Sent: Friday, J
uly 24, 2020 6:07:10 PM
>Subject: AeroElectric-List: Smoker GFCI question
>
>Non aviation question for y'all: I just installed a new outlet on my
>p
atio, so I can use my electric smoker and an electric fan without an
>exten
sion cord=2E The fan works great=2E The smoker is ok when first
>plugged in
and turned on so it connects to the WiFi=2E But a few minutes
>after turni
ng the smoker's heating element in, the GFCI trips=2E
>
>It's a Char-Broil
electric smoker, 750W=2E It's a new, weatherproof 15A
>GFCI=2E
>
>Thought
s?
>
>-- Art Z=2E
>
>Sent from my phone=2E Please excuse brevity and biza
rre typos=2E
Message 7
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| Subject: | Re: Standard mags: Lycoming |
Depends on what the mags are. If they both have impulse couplings you can start
on both, I think.
Sent from my iPhone
> On Jul 27, 2020, at 9:26 AM, John M Tipton <johntiptonuk@hotmail.com> wrote:
>
>
> Hi Guys
>
> With 'standard' mags as supplied by Lycoming, and an RV9a with ACS Key switch
WITHOUT starter position and using 'push switch' to operate starter, should the
engine be started on LEFT MAG ONLY.
>
> John
>
> PS: Aircraft Spruce photo: copyright acknowledged
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=497432#497432
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/electrical_ignition_switches_acs_keyed_ignition_switches_1_108.jpg
>
>
>
>
>
>
Message 8
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| Subject: | Re: Transponder and/or ADSB Antenna Installation and |
Radiation
The insurance company will not have anything to say about it unless there
is some weird liability claim arising from a failure of the ELT. Not worth
worrying about.
On Sun, Jul 26, 2020, 16:18 Charlie England <ceengland7@gmail.com> wrote:
> Don't forget that while a homebrew ELT antenna may work better than the
> supplied version, it probably isn't legal. Unlike most radio stuff, the
> antenna is usually part of the certification of the ELT, and ELTs must be
> certificated in the USA; even in homebuilts.
>
> Won't matter until that picky a/w inspector comes to sign off the plane,
> or if you get past that, dealing with the Insurance company after you
> survive a crash.
>
> Charlie
>
> On Sun, Jul 26, 2020 at 11:42 AM <billhuntersemail@gmail.com> wrote:
>
>> Thanks Bob for the informationgreatly appreciated.
>>
>>
>>
>> *From:* owner-aeroelectric-list-server@matronics.com <
>> owner-aeroelectric-list-server@matronics.com> *On Behalf Of *Robert L.
>> Nuckolls, III
>> *Sent:* Wednesday, July 22, 2020 9:17 PM
>> *To:* aeroelectric-list@matronics.com
>> *Subject:* Re: AeroElectric-List: Transponder and/or ADSB Antenna
>> Installation and Radiation
>>
>>
>>
>>
>> So the questions are:
>>
>> -Is the ground plane better to be square/ round/ or hexagon/ or some
>> other shape?
>>
>>
>> Why not eliminate the need for ground planes with
>> vertically polarized dipoles mounted to inside surfaces
>> of empannage?
>>
>> https://tinyurl.com/y3w4hf8y
>>
>>
>> -If the diameter of the ground plane cannot be exactly a square and the
>> same dimension as indicated on the installation guide what is the
>> problem(s) with it being slightly to wide or slightly too narrow than sp
ec,
>> or if the antenna is not installed in the exact center?
>>
>>
>> ditch the ground planes
>>
>>
>>
>> -The book says the two antennae should be mounted at least two feet from
>> each other so what if they were installed closeror even co-loca
ted on the
>> same ground plane?
>>
>>
>> Mount one on left side forward, the other
>> right side aft. Getting separation shouldn't
>> be a problem.
>>
>>
>>
>> -What about mounting these masts near human body parts (ouch)?
>>
>> -What about mounting these masts near other avionics or other electrical
>> equipment?
>>
>>
>> back in the tail?
>>
>>
>> Bob . . .
>>
>
Message 9
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| Subject: | Re: Smoker GFCI question |
Joe,
The longer cord (adding the extension cord) allows the thing to work. The
GFCI trips when I do not use an extension cord.
I'll do more experiments tomorrow. It's raining cats and dogs today and I'm
that *that* into testing the GFCI to stand in the rain and plug stuff in.
:-P
-- Art Z.
On Mon, Jul 27, 2020 at 9:40 AM user9253 <fransew@gmail.com> wrote:
>
> The length of the cord is most likely the problem. A longer cord has
> more capacitance which allows a few more milliamps to leak to ground.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=497434#497434
>
>
--
https://CheerfulCurmudgeon.com/
*If I am not for myself, who will be for me? If I am only for myself, what
am I? If not now, when?*
Message 10
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| Subject: | Re: Standard mags: Lycoming |
The common configuration is to have the impulse coupling on the left, which
means left on and right off for starting.
On July 27, 2020 09:31:49 "John M Tipton" <johntiptonuk@hotmail.com> wrote:
> <johntiptonuk@hotmail.com>
>
> Hi Guys
>
> With 'standard' mags as supplied by Lycoming, and an RV9a with ACS Key
> switch WITHOUT starter position and using 'push switch' to operate starter,
> should the engine be started on LEFT MAG ONLY.
>
> John
>
> PS: Aircraft Spruce photo: copyright acknowledged
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=497432#497432
>
>
> Attachments:
>
> http://forums.matronics.com//files/electrical_ignition_switches_acs_keyed_ignition_switches_1_108.jpg
>
>
Message 11
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| Subject: | Z11 field supply circuit protection |
Hi, this is my first E-mail to the list. I've done some searches but came up empty
for answers. I'm finalizing the electrical schematic for my RV-7 build, which
is very loosely based on the AeroElectric Z11 example. Single alternator,
LR-3 regulator. A few questions:
1. Z-11 shows the field supply circuit running from the fuse block stud through
a 22AWG fusable link, through the battery/alt switch, through a 5A circuit breaker,
and ending up at the voltage regulator (pin 6). Since the circuit is protected
by the 5A breaker, what is the purpose of the fusable link, and what are
the negative consequences of omitting the fusable link?
2. Should current drawn through the above circuit be considered for the purpose
of load analysis to help me choose the right size alternator? If so, what range
of currents should I expect through it?
3. Same question for the bus voltage sense (pin 3) on the regulator. Does that
draw significantly current?
Thank you!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497449#497449
Message 12
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| Subject: | Re: Standard mags: Lycoming |
On Mon, Jul 27, 2020 at 8:30 AM John M Tipton <johntiptonuk@hotmail.com>
wrote:
> johntiptonuk@hotmail.com>
>
> Hi Guys
>
> With 'standard' mags as supplied by Lycoming, and an RV9a with ACS Key
> switch WITHOUT starter position and using 'push switch' to operate starter,
> should the engine be started on LEFT MAG ONLY.
>
> John
>
> The engine should be started with the impulse coupled mag 'on' (ungrounded
P lead), and the other P lead grounded. What you describe is how the
switch *should* operate, but it's easy to verify operation for yourself.
Without the P leads connected to the switch, Measure resistance from each P
lead terminal to the ground terminal, 1st with the switch 'off', then in
'L', then in 'R'. Both P lead terminals should show dead short to the
ground terminal with the switch 'Off'. The 'L' terminal should show an
open circuit (infinitely high resistance) and the 'R' terminal should show
a short to ground with the switch in 'L', and the reverse in 'R'. With the
switch in 'Both', both terminals should show open to the ground terminal.
(Don't forget that if you're touching the terminals with your fingers, your
body will conduct slightly, so depending on the meter, you might see some
high but not infinite resistance when the switch is open.)
The left mag is *typically* the impulse mag, but it's pretty easy to check.
The impulse mag has what appears to be a spacer that's about an inch thick
between the body of the mag and the engine. So the 'taller' mag is the
impulse mag.
Charlie
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Message 13
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| Subject: | Re: Z11 field supply circuit protection |
1. The purpose of the fuselink is to protect the wire between the main power
bus and the circuit breaker. If that wire is very short and installed with good
workmanship and the chances of shorting to ground are slim, then you could
eliminate the fuselink.
2. Yes, the field current needs to be considered. The current depends on the
alternator size and the alternator load. 3 amps is a guess.
3. Voltage sense current is insignificant.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497452#497452
Message 14
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| Subject: | Re: Z11 field supply circuit protection |
On 7/27/2020 6:22 PM, draker wrote:
>
> Hi, this is my first E-mail to the list. I've done some searches but came up
empty for answers. I'm finalizing the electrical schematic for my RV-7 build,
which is very loosely based on the AeroElectric Z11 example. Single alternator,
LR-3 regulator. A few questions:
>
> 1. Z-11 shows the field supply circuit running from the fuse block stud through
a 22AWG fusable link, through the battery/alt switch, through a 5A circuit
breaker, and ending up at the voltage regulator (pin 6). Since the circuit is
protected by the 5A breaker, what is the purpose of the fusable link, and what
are the negative consequences of omitting the fusable link?
>
> 2. Should current drawn through the above circuit be considered for the purpose
of load analysis to help me choose the right size alternator? If so, what range
of currents should I expect through it?
>
> 3. Same question for the bus voltage sense (pin 3) on the regulator. Does that
draw significantly current?
>
> Thank you!
>
I had similar questions, back when I first started studying the Z drawings.
The key thing to remember is that fuses (links, etc) always protect the
downstream wire from the current source. Without the link, the path from
buss to breaker is unprotected.
Your next question (or at least mine was) is the why of the various wire
sizes. The link is the smallest wire size that's reasonable for physical
ruggedness. Wire steps up 4 sizes so the link can do its job. After the
breaker, it can step back down to what the 5A breaker can protect.
The alternator ultimately must 'pay back' the energy used to drive its
field, so, yes.
There should be negligible current on the sense wire.
Have fun,
Charlie
--
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Message 15
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| Subject: | Re: Z11 field supply circuit protection |
Bob speaks briefly about alternator field current in the fourth post at http://forum.matronics.com/viewtopic.php?t=16775302
BTW: Are you aware the latest Z dwg revs are in the Adobe... folder at http://www.aeroelectric.com/PPS/
--------
John Bright, RV-6A, at FWF, O-360
Z-101 single batt dual alt SDS EM-5-F.
john_s_bright@yahoo.com, Newport News, Va
https://drive.google.com/drive/folders/1u6GeZo6pmBWsKykLNVQMvu4o1VEVyP4K
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=497455#497455
Message 16
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| Subject: | Re: Transponder and/or ADSB Antenna Installation and |
Radiation
I'd strongly suggest reading your policy. Unrelated violations of the
FARs have been used in the past to deny coverage. Avemco denied
*liability* coverage to a guy back in the early '90s, when his crash did
hundreds of thousands of dollars of damage to structures on the ground.
The denial was based on an unlogged system change that was made, and
then changed back to the original configuration prior to the accident,
and had nothing to do with the accident.
Charlie
On 7/26/2020 6:49 PM, Sebastien wrote:
> The insurance company will not have anything to say about it unless
> there is some weird liability claim arising from a failure of the ELT.
> Not worth worrying about.
>
> On Sun, Jul 26, 2020, 16:18 Charlie England <ceengland7@gmail.com
> <mailto:ceengland7@gmail.com>> wrote:
>
> Don't forget that while a homebrew ELT antenna may work better
> than the supplied version, it probably isn't legal. Unlike most
> radio stuff, the antenna is usually part of the certification of
> the ELT, and ELTs must be certificated in the USA; even in
> homebuilts.
>
> Won't matter until that picky a/w inspector comes to sign off the
> plane, or if you get past that, dealing with the Insurance company
> after you survive a crash.
>
> Charlie
>
> On Sun, Jul 26, 2020 at 11:42 AM <billhuntersemail@gmail.com
> <mailto:billhuntersemail@gmail.com>> wrote:
>
> Thanks Bob for the informationgreatly appreciated.
>
> *From:* owner-aeroelectric-list-server@matronics.com
> <mailto:owner-aeroelectric-list-server@matronics.com>
> <owner-aeroelectric-list-server@matronics.com
> <mailto:owner-aeroelectric-list-server@matronics.com>> *On
> Behalf Of *Robert L. Nuckolls, III
> *Sent:* Wednesday, July 22, 2020 9:17 PM
> *To:* aeroelectric-list@matronics.com
> <mailto:aeroelectric-list@matronics.com>
> *Subject:* Re: AeroElectric-List: Transponder and/or ADSB
> Antenna Installation and Radiation
>
>
> So the questions are:
>
> -Is the ground plane better to be square/ round/ or
> hexagon/ or some other shape?
>
>
> Why not eliminate the need for ground planes with
> vertically polarized dipoles mounted to inside surfaces
> of empannage?
>
> https://tinyurl.com/y3w4hf8y
>
>
> -If the diameter of the ground plane cannot be exactly a
> square and the same dimension as indicated on the
> installation guide what is the problem(s) with it being
> slightly to wide or slightly too narrow than spec, or if
> the antenna is not installed in the exact center?
>
>
> ditch the ground planes
>
>
> -The book says the two antennae should be mounted at least
> two feet from each other so what if they were installed
> closeror even co-located on the same ground plane?
>
>
> Mount one on left side forward, the other
> right side aft. Getting separation shouldn't
> be a problem.
>
>
> -What about mounting these masts near human body parts (ouch)?
>
> -What about mounting these masts near other avionics or
> other electrical equipment?
>
>
> back in the tail?
>
>
> Bob . . .
>
--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 17
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| Subject: | Re: Z11 field supply circuit protection |
>
>
>The alternator ultimately must 'pay back' the energy used to drive
>its field, so, yes.
Alternator nameplate ratings account for internal
demands of the field winding and are not part
of your load analysis.
At low rpm and high loads, the field CAN be
on the order of 3A. At cruise on a lycoming
I've seen it as low as 1A. But it's not
a part of your energy management concerns.
Bob . . .
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