Today's Message Index:
----------------------
1. 06:46 AM - Re: ECU - EFI - Dual Battery Bus - Schottky Diode ? (Eric M. Jones)
2. 07:09 AM - E-MAGS, P-MAGS, CDI QUESTION (greg issitt)
3. 07:43 AM - EXP2BUS and non-functioning alternator (Ian)
4. 08:36 AM - Re: EXP2BUS and non-functioning alternator (Matt Prather)
5. 08:42 AM - Re: E-MAGS, P-MAGS, CDI QUESTION (Robert L. Nuckolls, III)
6. 08:43 AM - Re: EXP2BUS and non-functioning alternator (Robert L. Nuckolls, III)
7. 09:43 AM - Re: EXP2BUS and non-functioning alternator (Ian)
8. 09:43 AM - Re: Re: ECU - EFI - Dual Battery Bus - Schottky Diode ? (simon@synchdes.com)
9. 10:12 AM - Re: EXP2BUS and non-functioning alternator (Matt Prather)
10. 11:46 AM - Re: EXP2BUS and non-functioning alternator (Robert L. Nuckolls, III)
11. 12:06 PM - Recommendation for schematic using only 1 B&C PM alternator/Dual Lightspeed II (Kevin Sheely)
12. 01:45 PM - Re: Recommendation for schematic using only 1 B&C PM alternator/Dual Lightspeed II (Robert L. Nuckolls, III)
13. 02:25 PM - Re: E-MAGS, P-MAGS, CDI QUESTION ()
14. 03:50 PM - Fried EXP2BUS was EXP2BUS and non-functioning alternator (Ed Anderson)
15. 06:18 PM - ECU - EFI - Dual Battery Bus - Schottky Diode ? (Mike West)
16. 08:08 PM - Re: E-MAGS, P-MAGS, CDI QUESTION (Tim Andres)
17. 10:05 PM - Re: Fried EXP2BUS was EXP2BUS and non-functioning alternator (Mike Humphrey)
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Subject: | Re: ECU - EFI - Dual Battery Bus - Schottky Diode ? |
Perihelion Design has sold a bunch of dual Schottkys to do exactly what you want.
See:
www.periheliondesign.com/downloads/powerdeuceschottkymanual.pdf
"Amateurs built the Ark, professionals built the Titanic."
--Anonymous
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones@charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=242053#242053
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Subject: | E-MAGS, P-MAGS, CDI QUESTION |
Hi there,
Is there any reference material on this board on how the different ignition
systems function? I am just finishing Bob Nuckoll's book and am starting to
get a wiring plan together for my Aerovee powered Sonex. I realize I don't
know what kind of ignition system the Aerovee engine has, and that I would
like to learn more about the differences in all the mag systems used in
aircraft.
Thanks for any help,
Greg Issitt
Message 3
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Subject: | EXP2BUS and non-functioning alternator |
Hello,
I'm in the primary flight testing phase with my RV-9A. I have an
EXP2BUS and a 40A alternator with an internal regulator which came from
AeroSport Power in Vancouver.
I've never seen the alternator charging strongly, although my test pilot
thinks he saw 20A the other day. I see no amps at any engine speed.
I believe I have everything connected correctly and wondered if anyone
on the list had a similar experience.
Any advice on what to check and in what sequence, would be appreciated.
This is my first Matronics post, and hopefully my new-to-Canadian-skies
RV-9A will be able to feed itself with electric power with your help.
Thanks,
Ian Brown,
Bromont,
Quebec
PS: The belt IS tight, but not too tight!
Message 4
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Subject: | Re: EXP2BUS and non-functioning alternator |
What's the bus voltage? If you see values above 12.5V your alternator is
putting out some power. If it's above 14V, it sounds like completely
normal output.
I'm not very familiar with the EXP2BUS.. Where in the circuit is current
being measured. Does the system use a shunt or a hall effect sensor?
Regards,
Matt-
>
> Hello,
> I'm in the primary flight testing phase with my RV-9A. I have an
> EXP2BUS and a 40A alternator with an internal regulator which came from
> AeroSport Power in Vancouver.
>
> I've never seen the alternator charging strongly, although my test pilot
> thinks he saw 20A the other day. I see no amps at any engine speed.
>
> I believe I have everything connected correctly and wondered if anyone
> on the list had a similar experience.
>
> Any advice on what to check and in what sequence, would be appreciated.
>
> This is my first Matronics post, and hopefully my new-to-Canadian-skies
> RV-9A will be able to feed itself with electric power with your help.
>
> Thanks,
> Ian Brown,
> Bromont,
> Quebec
> PS: The belt IS tight, but not too tight!
>
>
Message 5
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Subject: | Re: E-MAGS, P-MAGS, CDI QUESTION |
At 09:01 AM 4/30/2009, you wrote:
Hi there,
Is there any reference material on this board on how the different
ignition systems function? I am just finishing Bob Nuckoll's book and
am starting to get a wiring plan together for my Aerovee powered
Sonex. I realize I don't know what kind of ignition system the
Aerovee engine has, and that I would like to learn more about the
differences in all the mag systems used in aircraft.
A short visit to the AeroVee web information
doesn't give us much detail however, it's
almost a certainty that this aero conversion
of the popular VW engine comes with a well
defined ignition system.
On the last page of their sample installation
manual at:
http://www.sonexaircraft.com/support/AeroVee_sample.pdf
we see wiring diagrams for dual ignition. One is
a "magneto" type powered from the flywheel. The
other is a "battery" type powered from the ship's
electrical system. What you see is what you get.
You wont have any bolt on options common to
other aircraft engines.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 6
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Subject: | Re: EXP2BUS and non-functioning alternator |
At 09:37 AM 4/30/2009, you wrote:
>
>Hello,
>I'm in the primary flight testing phase with my RV-9A. I have an
>EXP2BUS and a 40A alternator with an internal regulator which came from
>AeroSport Power in Vancouver.
>
>I've never seen the alternator charging strongly, although my test pilot
>thinks he saw 20A the other day. I see no amps at any engine speed.
>
>I believe I have everything connected correctly and wondered if anyone
>on the list had a similar experience.
>
>Any advice on what to check and in what sequence, would be appreciated.
>
>This is my first Matronics post, and hopefully my new-to-Canadian-skies
>RV-9A will be able to feed itself with electric power with your help.
What's your bus voltage? Where does your instrumentation
read Amps? Battery? Alternator output?
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 7
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Subject: | Re: EXP2BUS and non-functioning alternator |
Actually I am supposed to have amps being measured on the alternator
output with a shunt, for the Van's Aircraft ammeter, and with an
induction coil for the Rocky Mountain EIS. Both agree that I'm not
putting out amps, and the system is not charging at all. If I run on my
Dynon EFIS I get quite a good measure of battery voltage, and it goes
down steadily whether the engine is running or not.
I guess I may be a bit premature in addressing this list since there is
an anomaly I have to check first. The alternator warning light does not
come on at all. Any suggestions on why this might be would be
appreciated. It could be a simple mis-wire since I just started running
the engine recently, and had the battery on a trickle charger constantly
until about a week ago. Hopefully the two are symptoms of the same
problem.
Ian
On Thu, 2009-04-30 at 10:43 -0500, Robert L. Nuckolls, III wrote:
>
> At 09:37 AM 4/30/2009, you wrote:
> >
> >Hello,
> >I'm in the primary flight testing phase with my RV-9A. I have an
> >EXP2BUS and a 40A alternator with an internal regulator which came from
> >AeroSport Power in Vancouver.
> >
> >I've never seen the alternator charging strongly, although my test pilot
> >thinks he saw 20A the other day. I see no amps at any engine speed.
> >
> >I believe I have everything connected correctly and wondered if anyone
> >on the list had a similar experience.
> >
> >Any advice on what to check and in what sequence, would be appreciated.
> >
> >This is my first Matronics post, and hopefully my new-to-Canadian-skies
> >RV-9A will be able to feed itself with electric power with your help.
>
> What's your bus voltage? Where does your instrumentation
> read Amps? Battery? Alternator output?
>
>
> Bob . . .
>
> ----------------------------------------)
> ( . . . a long habit of not thinking )
> ( a thing wrong, gives it a superficial )
> ( appearance of being right . . . )
> ( )
> ( -Thomas Paine 1776- )
> ----------------------------------------
>
>
>
>
>
>
Message 8
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Subject: | Re: ECU - EFI - Dual Battery Bus - Schottky |
Diode ?
Eric, the anonymous quote below is fabulous!
Simon
> <emjones@charter.net>
>
> Perihelion Design has sold a bunch of dual Schottkys to do exactly what
> you want. See:
>
> www.periheliondesign.com/downloads/powerdeuceschottkymanual.pdf
>
>
> "Amateurs built the Ark, professionals built the Titanic."
> --Anonymous
>
> --------
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge, MA 01550
> (508) 764-2072
> emjones@charter.net
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=242053#242053
>
>
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Subject: | Re: EXP2BUS and non-functioning alternator |
Do the people that produce the EXP2BUS provide a troubleshooting guide?
That's what I'd start on (after verifying to the best of my ability that
the system is wired as designed).
Regards,
Matt-
>
> Actually I am supposed to have amps being measured on the alternator
> output with a shunt, for the Van's Aircraft ammeter, and with an
> induction coil for the Rocky Mountain EIS. Both agree that I'm not
> putting out amps, and the system is not charging at all. If I run on my
> Dynon EFIS I get quite a good measure of battery voltage, and it goes
> down steadily whether the engine is running or not.
>
> I guess I may be a bit premature in addressing this list since there is
> an anomaly I have to check first. The alternator warning light does not
> come on at all. Any suggestions on why this might be would be
> appreciated. It could be a simple mis-wire since I just started running
> the engine recently, and had the battery on a trickle charger constantly
> until about a week ago. Hopefully the two are symptoms of the same
> problem.
>
> Ian
>
> On Thu, 2009-04-30 at 10:43 -0500, Robert L. Nuckolls, III wrote:
>> <nuckolls.bob@aeroelectric.com>
>>
>> At 09:37 AM 4/30/2009, you wrote:
>> >
>> >Hello,
>> >I'm in the primary flight testing phase with my RV-9A. I have an
>> >EXP2BUS and a 40A alternator with an internal regulator which came from
>> >AeroSport Power in Vancouver.
>> >
>> >I've never seen the alternator charging strongly, although my test
>> pilot
>> >thinks he saw 20A the other day. I see no amps at any engine speed.
>> >
>> >I believe I have everything connected correctly and wondered if anyone
>> >on the list had a similar experience.
>> >
>> >Any advice on what to check and in what sequence, would be appreciated.
>> >
>> >This is my first Matronics post, and hopefully my new-to-Canadian-skies
>> >RV-9A will be able to feed itself with electric power with your help.
>>
>> What's your bus voltage? Where does your instrumentation
>> read Amps? Battery? Alternator output?
>>
>>
>> Bob . . .
>>
>> ----------------------------------------)
>> ( . . . a long habit of not thinking )
>> ( a thing wrong, gives it a superficial )
>> ( appearance of being right . . . )
>> ( )
>> ( -Thomas Paine 1776- )
>> ----------------------------------------
>>
>>
>>
>>
>>
>>
>
>
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Subject: | Re: EXP2BUS and non-functioning alternator |
>Actually I am supposed to have amps being measured on the alternator
>output with a shunt, for the Van's Aircraft ammeter, and with an
>induction coil for the Rocky Mountain EIS. Both agree that I'm not
>putting out amps, and the system is not charging at all. If I run on my
>Dynon EFIS I get quite a good measure of battery voltage, and it goes
>down steadily whether the engine is running or not.
Okay, next step is to see if the alternator is even being
asked to go to work. Under conditions that you would expect
the alternator to be working, check for command voltage
at the alternator's control connector.
>I guess I may be a bit premature in addressing this list since there is
>an anomaly I have to check first. The alternator warning light does not
>come on at all.
If the alternator is not being commanded ON, it may
well consider operations to be "normal" and not
illuminate a light.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
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Subject: | Recommendation for schematic using only 1 B&C PM alternator/Dual |
Lightspeed II
Message 12
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Subject: | Re: Recommendation for schematic using only 1 B&C |
PM alternator/Dual Lightspeed II
There's not a lot of choices . . . but I'm curious.
What's the engine/airframe combination upon which
you plan to install this combination? How do you
plan to use the airplane? Finally, why dual
electronic ignition systems?
You would probably start with something like Z-16
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z16M.pdf
and run the ignition(s) directly from the battery.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 13
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Subject: | E-MAGS, P-MAGS, CDI QUESTION |
Greg,
Not sure if you got to Sun N' Fun last week but E-Mag had a nice table
with lots of examples and information. I have found that if you go
digging on each of the respective vendor sites, you will find lots of
detail on each, albeit by individual authors. That is probably your best
bet.
Aerovee will tell you what they prefer (you can be sure they have an
opinion). Yes, the learning process is good practice and lots of fun.
Glenn
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of greg
issitt
Sent: Thursday, April 30, 2009 10:02 AM
Subject: AeroElectric-List: E-MAGS, P-MAGS, CDI QUESTION
Hi there,
Is there any reference material on this board on how the different
ignition systems function? I am just finishing Bob Nuckoll's book and am
starting to get a wiring plan together for my Aerovee powered Sonex. I
realize I don't know what kind of ignition system the Aerovee engine
has, and that I would like to learn more about the differences in all
the mag systems used in aircraft.
Thanks for any help,
Greg Issitt
Message 14
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Subject: | EXP2BUS and non-functioning alternator |
Hi Ian,
While I do not have an EXP2bus, I did assist a fellow RVer who had one that
was giving him problems. The problem was the battery would not stay
charged, charge it up and over night it would be dead.
I had no experience with the EXP2bus, but did have a voltohm meter and got
the schematics off the internet. To make a long story short, at some point
someone had blown/cooked the Exp2 on-board 40 amp (Master) relay. More on
how I think they did it - which is my real reason for addressing your
question.
When I first pulled the board I noticed that the solder coating on some of
the copper traces on the board had gotten hot enough to melt and run off - a
sure sign of excessive current flow. I then found that the master on-board
relay was missing from its socket and a heavy strip of copper bar had been
solder across two of the relays socket pins.
The addition of this jumper strip in lieu of the relay resulted in the
battery remaining connected to the alternator B lead (and other board loads)
even with the master switch off. The reason is that when the board's master
switch is on all it does is ground the circuit through this relay and causes
it to close (or open if switch is off).
So with no relay and the jumper installed, there was no way to disconnect
the load drain on the battery which as a consequence was drained overnight.
I looking over the EXP2 diagram it became clear that IF the board's master
switch was left ON AND the "B" lead of the alternator was grounded (or the
alternator somehow shorted out) that the path of current went from battery
through board (melting the solder from the traces), through the relay
(frying the 40 amp relay) and on to ground through the "B" lead. Now, I was
not there, so don't know if this happened, but it certainly would fry the
board if it did.
So make certain that if you work on the board or alternator to disconnect
the battery OR at a minimum insure the Master switch is OFF.
Now, I don't know if your board has a problem, but if I had and Exp2 board
and my battery was not charging I would check the on-board relay.
Ed
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
http://www.dmack.net/mazda/index.html
http://www.flyrotary.com/
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.rotaryaviation.com/Rotorhead%20Truth.htm
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ian
Sent: Thursday, April 30, 2009 12:40 PM
Subject: Re: AeroElectric-List: EXP2BUS and non-functioning alternator
Actually I am supposed to have amps being measured on the alternator
output with a shunt, for the Van's Aircraft ammeter, and with an
induction coil for the Rocky Mountain EIS. Both agree that I'm not
putting out amps, and the system is not charging at all. If I run on my
Dynon EFIS I get quite a good measure of battery voltage, and it goes
down steadily whether the engine is running or not.
I guess I may be a bit premature in addressing this list since there is
an anomaly I have to check first. The alternator warning light does not
come on at all. Any suggestions on why this might be would be
appreciated. It could be a simple mis-wire since I just started running
the engine recently, and had the battery on a trickle charger constantly
until about a week ago. Hopefully the two are symptoms of the same
problem.
Ian
On Thu, 2009-04-30 at 10:43 -0500, Robert L. Nuckolls, III wrote:
<nuckolls.bob@aeroelectric.com>
>
> At 09:37 AM 4/30/2009, you wrote:
> >
> >Hello,
> >I'm in the primary flight testing phase with my RV-9A. I have an
> >EXP2BUS and a 40A alternator with an internal regulator which came from
> >AeroSport Power in Vancouver.
> >
> >I've never seen the alternator charging strongly, although my test pilot
> >thinks he saw 20A the other day. I see no amps at any engine speed.
> >
> >I believe I have everything connected correctly and wondered if anyone
> >on the list had a similar experience.
> >
> >Any advice on what to check and in what sequence, would be appreciated.
> >
> >This is my first Matronics post, and hopefully my new-to-Canadian-skies
> >RV-9A will be able to feed itself with electric power with your help.
>
> What's your bus voltage? Where does your instrumentation
> read Amps? Battery? Alternator output?
>
>
> Bob . . .
>
> ----------------------------------------)
> ( . . . a long habit of not thinking )
> ( a thing wrong, gives it a superficial )
> ( appearance of being right . . . )
> ( )
> ( -Thomas Paine 1776- )
> ----------------------------------------
>
>
>
>
>
>
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 3267 (20080714) __________
The message was checked by ESET NOD32 Antivirus.
Message 15
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Subject: | ECU - EFI - Dual Battery Bus - Schottky Diode ? |
Thank you all very much for your responses.
Bob=2C I have your book (which I like very much) ... Where do you reckon I
got the dual diode idea anyway ?
To my knowledge=2C there are 3 things to provide power to for electronic en
gine control: ECU (black box controller)=2C fuel injectors & ignition coils
. The ECU is shown in the Aeroelectric diagrams ... but not the injectors o
r coils.
The ECU I have is made by Real World Solutions (EC3-AA) and controls the gr
ound side of the injectors and coils. I'm assuming they use some type of tr
ansistors/switches to turn on/off the injectors & coils. Whatever power I p
rovide to the ECU is not used by the injectors & coils but rather for opera
ting the internal switches in the ECU (that pulse on/off injectors & coils)
.
My first concern is that I have adequate voltage for the fuel injectors and
the ignition coils. If the alternator dies and the batteries are at 12V th
en I would have ~11.5V to operate the injectors and coils (0.5V lost across
Schottky diodes).
Also ... should I power the ECU at exactly the same voltage I provide to th
e injectors and coils? Is the ECU smart enough to recognize the voltage sup
plied to it and perhaps fire the injectors and coils differently based on t
he voltage it sees? What if my ECU was powered at 12V (thru a switch) and m
y injectors & coils were powered at 11.5V (thru diodes)? That is a question
I will send to Real World Solutions / Rotary Aviation and post.
Yeah ... I know what you're thinkin ... we answer one question for this guy
now he'll never leave us alone !
Thanks again :-)
-Mike
_________________________________________________________________
Rediscover Hotmail=AE: Get quick friend updates right in your inbox.
http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_
Updates2_042009
Message 16
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Subject: | Re: E-MAGS, P-MAGS, CDI QUESTION |
Lightspeed's website has a section that deals in depth on the advanteges of
electronic ingnition and the pros & cons of the different systems types as
well as a good deal of info on flame speeds etc with the various mixture r
atios . Good reading material.=0ATim Andres=0A=0A=0A=0A=0A_________________
_______________=0AFrom: "longg@pjm.com" <longg@pjm.com>=0ATo: aeroelectric-
list@matronics.com=0ASent: Thursday, April 30, 2009 2:23:38 PM=0ASubject: R
E: AeroElectric-List: E-MAGS, P-MAGS, CDI QUESTION=0A=0A=0AGreg,=0A=C2-
=0ANot sure if you got to Sun N=99 Fun last week but E-Mag had a nice
table with lots of examples and information. I have found that if you go d
igging on each of the respective vendor sites, you will find lots of detail
on each, albeit by individual authors. That is probably your best bet.=0A
=C2-=0AAerovee will tell you what they prefer (you can be sure they have
an opinion). Yes, the learning process is good practice and lots of fun.=0A
=C2-=0AGlenn=0A=C2-=0AFrom:owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of greg is
sitt=0ASent: Thursday, April 30, 2009 10:02 AM=0ATo: aeroelectric-list@matr
onics.com=0ASubject: AeroElectric-List: E-MAGS, P-MAGS, CDI QUESTION=0A=C2
-=0AHi there,=0AIs there any reference material on this board on how the
different ignition systems function? I am just finishing Bob Nuckoll
=99s book and am starting to get a wiring plan together for my Aerovee powe
red Sonex. I realize I don=99t know what kind of ignition system the
Aerovee engine has, and that I would like to learn more about the differenc
es in all the mag systems used in aircraft.=0AThanks for any help,=0AGreg I
ssitt=0A=C2-=0A=C2-=0A =C2-=0A =C2-=0Ahttp://www.matronics.com/Navi
gator?AeroElectric-List=0Ahttp://forums.matronics.com=0Ahttp://www.matronic
=====
Message 17
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Subject: | Re: EXP2BUS and non-functioning alternator |
Ian,
Did you install a 40amp breaker per the instructions between the alternator
and the EXP2bus? The Master breaker is only designed for 35amp on the
board.
Mike H
----- Original Message -----
From: "Ed Anderson" <eanderson@carolina.rr.com>
Sent: Thursday, April 30, 2009 6:48 PM
Subject: Fried EXP2BUS was AeroElectric-List: EXP2BUS and non-functioning
alternator
> <eanderson@carolina.rr.com>
>
> Hi Ian,
>
> While I do not have an EXP2bus, I did assist a fellow RVer who had one
> that
> was giving him problems. The problem was the battery would not stay
> charged, charge it up and over night it would be dead.
>
> I had no experience with the EXP2bus, but did have a voltohm meter and got
> the schematics off the internet. To make a long story short, at some
> point
> someone had blown/cooked the Exp2 on-board 40 amp (Master) relay. More on
> how I think they did it - which is my real reason for addressing your
> question.
>
> When I first pulled the board I noticed that the solder coating on some of
> the copper traces on the board had gotten hot enough to melt and run off -
> a
> sure sign of excessive current flow. I then found that the master
> on-board
> relay was missing from its socket and a heavy strip of copper bar had been
> solder across two of the relays socket pins.
>
> The addition of this jumper strip in lieu of the relay resulted in the
> battery remaining connected to the alternator B lead (and other board
> loads)
> even with the master switch off. The reason is that when the board's
> master
> switch is on all it does is ground the circuit through this relay and
> causes
> it to close (or open if switch is off).
>
> So with no relay and the jumper installed, there was no way to disconnect
> the load drain on the battery which as a consequence was drained
> overnight.
>
> I looking over the EXP2 diagram it became clear that IF the board's master
> switch was left ON AND the "B" lead of the alternator was grounded (or the
> alternator somehow shorted out) that the path of current went from battery
> through board (melting the solder from the traces), through the relay
> (frying the 40 amp relay) and on to ground through the "B" lead. Now, I
> was
> not there, so don't know if this happened, but it certainly would fry the
> board if it did.
>
> So make certain that if you work on the board or alternator to disconnect
> the battery OR at a minimum insure the Master switch is OFF.
>
> Now, I don't know if your board has a problem, but if I had and Exp2 board
> and my battery was not charging I would check the on-board relay.
>
> Ed
>
> Ed Anderson
>
> Rv-6A N494BW Rotary Powered
>
> Matthews, NC
>
> eanderson@carolina.rr.com
>
> http://www.andersonee.com
>
> http://www.dmack.net/mazda/index.html
>
> http://www.flyrotary.com/
>
> http://members.cox.net/rogersda/rotary/configs.htm#N494BW
>
> http://www.rotaryaviation.com/Rotorhead%20Truth.htm
>
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ian
> Sent: Thursday, April 30, 2009 12:40 PM
> To: aeroelectric-list@matronics.com
> Subject: Re: AeroElectric-List: EXP2BUS and non-functioning alternator
>
>
> Actually I am supposed to have amps being measured on the alternator
> output with a shunt, for the Van's Aircraft ammeter, and with an
> induction coil for the Rocky Mountain EIS. Both agree that I'm not
> putting out amps, and the system is not charging at all. If I run on my
> Dynon EFIS I get quite a good measure of battery voltage, and it goes
> down steadily whether the engine is running or not.
>
> I guess I may be a bit premature in addressing this list since there is
> an anomaly I have to check first. The alternator warning light does not
> come on at all. Any suggestions on why this might be would be
> appreciated. It could be a simple mis-wire since I just started running
> the engine recently, and had the battery on a trickle charger constantly
> until about a week ago. Hopefully the two are symptoms of the same
> problem.
>
> Ian
>
> On Thu, 2009-04-30 at 10:43 -0500, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>>
>> At 09:37 AM 4/30/2009, you wrote:
>> >
>> >Hello,
>> >I'm in the primary flight testing phase with my RV-9A. I have an
>> >EXP2BUS and a 40A alternator with an internal regulator which came from
>> >AeroSport Power in Vancouver.
>> >
>> >I've never seen the alternator charging strongly, although my test pilot
>> >thinks he saw 20A the other day. I see no amps at any engine speed.
>> >
>> >I believe I have everything connected correctly and wondered if anyone
>> >on the list had a similar experience.
>> >
>> >Any advice on what to check and in what sequence, would be appreciated.
>> >
>> >This is my first Matronics post, and hopefully my new-to-Canadian-skies
>> >RV-9A will be able to feed itself with electric power with your help.
>>
>> What's your bus voltage? Where does your instrumentation
>> read Amps? Battery? Alternator output?
>>
>>
>> Bob . . .
>>
>> ----------------------------------------)
>> ( . . . a long habit of not thinking )
>> ( a thing wrong, gives it a superficial )
>> ( appearance of being right . . . )
>> ( )
>> ( -Thomas Paine 1776- )
>> ----------------------------------------
>>
>>
>>
>>
>>
>>
>
>
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