Today's Message Index:
----------------------
1. 12:16 AM - Re: Alt/Batt switch question (westexflyboy)
2. 06:32 AM - Re: Re: Alt/Batt switch question (Dale Rogers)
3. 06:37 AM - Re: Re: Alt/Batt switch question (BobsV35B@aol.com)
4. 11:27 AM - glideslope antenna was lower OM minima (Chris Stone)
5. 11:41 AM - Balum Construction (Don Curry)
6. 12:10 PM - Re: glideslope antenna was lower OM minima (Richard Dudley)
7. 02:22 PM - Re: Balum Construction (jetboy)
8. 02:41 PM - Re: Re: Balum Construction (Don Curry)
9. 02:53 PM - Z-19 + Ford regulator killing batteries? (Mark R. Supinski)
10. 04:31 PM - Re: glideslope antenna was lower OM minima (BobsV35B@aol.com)
11. 10:12 PM - PS1000 II Mike Larkin (DEAN PSIROPOULOS)
Message 1
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Subject: | Re: Alt/Batt switch question |
[quote="nuckollsr(at)cox.net"]At 04:47 PM 3/26/2006 -0500, you wrote:
> You might want to include it in the pre-flight checklist by closing the cross
tie, turn aux battery and alternator OFF to see that the aux bus stays lit then
return the system to the flight configuration.
>
> Bob . . .
Bob, am I understanding correctly that it is acceptable close the crossfeed switch
with both alternators and batteries turned on and functioning normally? Perhaps
I am imagining a myth - that the two alternators are somehow phased differently
and cannot apply power to the same bus at the same time.
I, for one, would really appreciate both pre-flight and in-flight failure checklists
for Z-14 to dispell all misunderstandings.
--------
Chase Snodgrass
Presidio, Texas
www.flybigbend.com
Simultaneous RV-10 twins under construction
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235595#235595
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Subject: | Re: Alt/Batt switch question |
westexflyboy wrote:
> ... Perhaps I am imagining a myth - that the two alternators are somehow phased
differently and cannot apply power to the same bus at the same time.
>
Yes - you are myth-informed. Phasing in the alternators
doesn't matter, because they each have their own rectifiers;
so only DC hits the system wiring. Nevertheless, only one
of the alternators will end up doing all the work - the other's
regulator, having detected that higher voltage level, will will
cut it's field current, providing minimal output.
Dale R.
COZY MkIV #0497
Message 3
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Subject: | Re: Alt/Batt switch question |
Good Morning Chase,
Different Bob here, but it is my understanding that a properly operating
alternator has diodes or other rectification devices in the circuit that allow
us to have direct current, not alternating current, at our disposal.
If we hook two alternators together at the point where they are still
producing alternating current, the current will need to be put in phase or
"paralleled" as the big boys say.
Once the output has been rectified or smoothed out enough to be considered
direct current, paralleling ceases to be a problem. The source that has the
highest voltage will hog the load. The lower voltage source will just wait until
the voltage gets down to its level before it adds anything to the mix. That
is how we balance the load between two power output devices, we mess with the
voltage and the resistance between the current producing entities.
Make any sense at all?
Happy Skies
Old Bob
AKA
Bob Siegfried
Ancient Aviator
628 West 86th Street
Downers Grove, IL 60516
630 985-8502
Stearman N3977A
Brookeridge Air Park LL22
In a message dated 3/22/2009 2:17:43 A.M. Central Daylight Time,
airplanedriver@gmail.com writes:
--> AeroElectric-List message posted by: "westexflyboy"
<airplanedriver@gmail.com>
[quote="nuckollsr(at)cox.net"]At 04:47 PM 3/26/2006 -0500, you wrote:
> You might want to include it in the pre-flight checklist by closing the
cross tie, turn aux battery and alternator OFF to see that the aux bus stays
lit then return the system to the flight configuration.
>
> Bob . . .
Bob, am I understanding correctly that it is acceptable close the crossfeed
switch with both alternators and batteries turned on and functioning
normally? Perhaps I am imagining a myth - that the two alternators are somehow
phased differently and cannot apply power to the same bus at the same time.
I, for one, would really appreciate both pre-flight and in-flight failure
checklists for Z-14 to dispell all misunderstandings.
--------
Chase Snodgrass
Presidio, Texas
www.flybigbend.com
Simultaneous RV-10 twins under construction
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235595#235595
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
%3D62%26bcd%3DMarchfooterNO62)
Message 4
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Subject: | glideslope antenna was lower OM minima |
>
>
Now that we have settled the marker beacon issue...
>
What are the options for locating a glideslope antenna on an RV-8?
>
I am building my panel and suddenly had an OH ---- moment. I completely forgot
the GS antenna. My vert stab/rudder are complete so I am curious as to if anyone
has figured out another location for placing the dipole whisker antenna for
the GS receiver? I looked at the dipole strip antenna but it requires a flat
composite surface 40" deep perpendicular to the longitudinal axis of the aircraft.
So that seem to rule out the wingtip.
I had a suggestion from my local avionics shop to mount a dipole whisker ant. under
the horz. stab. This appears to be difficult at best. What would be the effect
on the antenna reception being two inches below a large ground plane?
I am really trying to avoid tearing of the fiberglass tip on the vert. stab. to
mount a dipole whisker. It's also unsightly!
>
plan the build... build the plan. Except when the old brain misfires.
>
Chris Stone
RV-8 (eventually)
Newberg OR.
>
>
>Well, Old Bob, I guess the story is to keep the Marker Beacon receiver off the
panel. I asked one question and got a different answer. However, your input is
much appreciated. I guess I won't miss the receiver and it will simplify my
panel. (However, you are right that it was pleasant hearing the signal when you
overflew the airports.) Good Bye KR22.
>--Jose
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=235407#235407
>
>
Message 5
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Subject: | Balum Construction |
Can RG-400 coax be used to build a balum for a whisker-type VOR antenna? Don
Message 6
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Subject: | Re: glideslope antenna was lower OM minima |
Hi Chris,
One of your options is to use a splitter (coupler) dividing the VOR/LOC and
the GS signals, avoiding the need for an additional antenna. Some of the
NAV/COMS (like the SL-30) do this internally. However, the Garmin 430 and
possibly others have separate antenna inputs for LOC and GS. Splitters are
available from many sources, like Spruce and Chief to do this.
Hope this helps.
Richard Dudley
-6A sold
----- Original Message -----
From: "Chris Stone" <rv8iator@earthlink.net>
Sent: Sunday, March 22, 2009 2:24 PM
Subject: AeroElectric-List: glideslope antenna was lower OM minima
> <rv8iator@earthlink.net>
>
>
>>
>>
> Now that we have settled the marker beacon issue...
>>
> What are the options for locating a glideslope antenna on an RV-8?
>>
> I am building my panel and suddenly had an OH ---- moment. I completely
> forgot the GS antenna. My vert stab/rudder are complete so I am curious as
> to if anyone has figured out another location for placing the dipole
> whisker antenna for the GS receiver? I looked at the dipole strip antenna
> but it requires a flat composite surface 40" deep perpendicular to the
> longitudinal axis of the aircraft. So that seem to rule out the wingtip.
> I had a suggestion from my local avionics shop to mount a dipole whisker
> ant. under the horz. stab. This appears to be difficult at best. What
> would be the effect on the antenna reception being two inches below a
> large ground plane?
> I am really trying to avoid tearing of the fiberglass tip on the vert.
> stab. to mount a dipole whisker. It's also unsightly!
>>
> plan the build... build the plan. Except when the old brain misfires.
>>
> Chris Stone
> RV-8 (eventually)
> Newberg OR.
>>
>>
>>Well, Old Bob, I guess the story is to keep the Marker Beacon receiver off
>>the panel. I asked one question and got a different answer. However, your
>>input is much appreciated. I guess I won't miss the receiver and it will
>>simplify my panel. (However, you are right that it was pleasant hearing
>>the signal when you overflew the airports.) Good Bye KR22.
>>--Jose
>>
>>
>>
>>
>>Read this topic online here:
>>
>>http://forums.matronics.com/viewtopic.php?p=235407#235407
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 7
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Subject: | Re: Balum Construction |
yes but it wont perform any different to a balun made from RG58 or RG316, providing
you cut the length proportional to the particular vf of the cable used.
Ralph
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235706#235706
Message 8
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Subject: | Re: Balum Construction |
> providing you cut the length proportional to the particular vf of the
cable used.
So just copying the dimensions of the old balum (which was made of RG58)
won't work? How do you figure the vf of RG400 and how do you convert that
information into info useful in determining the lengths of the various
segments of the new RG400 balum? Or is there a standard template with
lengths for making a balum from RG400?
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-
> server@matronics.com] On Behalf Of jetboy
> Sent: Sunday, March 22, 2009 5:20 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Re: Balum Construction
>
>
> yes but it wont perform any different to a balun made from RG58 or RG316,
> providing you cut the length proportional to the particular vf of the
cable used.
>
> Ralph
>
> --------
> Ralph - CH701 / 2200a
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=235706#235706
>
>
>
>
>
>
>
>
Message 9
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Subject: | Z-19 + Ford regulator killing batteries? |
Hello All-
I have a system based on the Z-19 drawing for an EFI based airplane.
Getting ready to fly for the first time, but I am now almost convinced my
setup is killing the batteries for some reason. I have gone through 3
already over the last 16 months just testing out the airplane & running the
engine in test spurts.
Here's the symptoms, hopefully someone can shed some light:
- Recommended Ford regulator
- 2x UB 12220 22AH batteries (3" w x 7" l x 6.5" h)
- 80 Amp alternator
My engine monitor keeps complaining that the alternator is putting out too
high a voltage (typically 15.0 - 15.5 after start with the engine running).
Don't know if this is just because the batteries were just discharged
starting the engine -- haven't had long enough engine runs to see if the
load drops.
All the batteries fail the same way -- suddenly they won't hold a charge &
output only 3v or so. Just had another one fail today.
After doing some additional reading, I am starting to wonder whether these
seal mat batteries are such a good idea. The literature suggests they are
quite finicky on how to recharge.
I must confess that I may have killed the batteries myself. I have an
external battery cart & I have simply been hooking the batteries up &
setting the charger to 40amp when the batteries were running down. The
batteries seem to want an initial charge of 3 amps or less before upping the
amperage.
Help!
Thanks,
Mark
Message 10
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Subject: | Re: glideslope antenna was lower OM minima |
Good Afternoon Chris,
My vote would be to use a splitter on the nav antenna. For about the last
thirty years, we have been splitting the signal four ways to feed two VORs and
two glide path receivers.
Modern radios are so good that all systems get plenty of signal.
As far as redundancy is concerned, if the antenna does fail, you still have
GPS to figure out where you are. If you have one that can process WAAS
signals, you can shoot the LPV approaches and there are now more of them than
there
are ILS approaches.
For a VHF nav antenna, I vote for a set of blades. Potential of a failure
with modern blades is practically nil!
Happy Skies
Old Bob
AKA
Bob Siegfried
Ancient Aviator
628 West 86th Street
Downers Grove, IL 60516
630 985-8502
Stearman N3977A
Brookeridge Air Park LL22
In a message dated 3/22/2009 1:29:35 P.M. Central Daylight Time,
rv8iator@earthlink.net writes:
What are the options for locating a glideslope antenna on an RV-8?
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
%3D62%26bcd%3DMarchfooterNO62)
Message 11
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Subject: | PS1000 II Mike Larkin |
Mike:
I understand PSE in that business (manufacturing intercom technology) and
yes, I did buy and use the aeroelectric book and CD and am very pleased with
the result of my wiring job. What bothers me is that after my first attempt
on the SL-10MS top connector, I contacted PSE about doing that harness for
me. The reason I did that was because they told me in the install manual
and the website that they could make up a wire harness if I gave them my
specs and a couple hundred bucks. So I gave them my specs/wire lengths and
was willing to pay a reasonable price for them to do the job. The response
I received was that PSE only makes up the mic and phones harness and not the
harness that is incorporated into the top connector (the harness I was
struggling to make). Since I had been working on the airplane for many
years and the wiring for many months I didn't feel like doing the upper
harness (again) at the time and was not happy that PSE would say they would
build me a harness (but not the one I needed). You say PSE is not in the
business of building MY homebuilt, fair enough but why does PSE bother to
offer to build one of the two harnesses (the EASY one to make) and not the
other? Why would PSE NOT build a harness for the upper connector if a
builder provided the diagrams and wire lengths? The reason I wasn't
impressed was because I didn't (and still don't) see the logic in offering
one thing but not the other! As a credit to PSE, I really like the functions
and features and flexibility of the unit, hopefully it will give me many
years of trouble free service. I've run into other folks in the homebuilt
world who do this same kind of thing and I don't see the logic in their
arguments either so PSE is not alone here. But, if PSE is ONLY in the
business of manufacturing intercom technology then why do they offer to
build ANY wiring harnesses at all?
Dean Psiropoulos
RV-6A N197DM
16 hours
______________________________ Original Message ____________________________
From: MICHAEL LARKIN <mlas@cox.net>
Subject: Re: AeroElectric-List: PS1000 II Prologue
Dean,
Not to give you to hard of a time. PS Engineering is in the business
of manufacturing intercom technology. They are not in the business of
building YOUR homebuilt aircraft. Why don't you use the resources of
the internet and learn how to do it yourself. One of the main
purposes of a homebuilt aircraft is education. Somewhere along the
line you missed that. The audio ground concept that PS Eng. uses is
very common in the industry. Go to the Aeroelectric and get on their
site and use the knowledge from all the builders before you. By the
way much of the Garmin audio technology came from PS Eng (FYI).
Mike Larkin
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