Today's Message Index:
----------------------
1. 12:23 AM - Re: Lightweight Panel-mounted AM/FM/CD Player.... (Pete & Farrell Rouse)
2. 05:05 AM - SD-8 Voltage (Steve Glasgow)
3. 05:32 AM - Alternator drive ratios (Gary Casey)
4. 06:22 AM - Over-voltage, etc (klehman@albedo.net)
5. 07:14 AM - Re: Microair 760 intercom (Duncan McBride)
6. 10:46 AM - Thanks Bob (David Aronson)
7. 11:15 AM - Re: Manual master switch (Robert L. Nuckolls, III)
8. 11:19 AM - Re: sample Z figures (Robert L. Nuckolls, III)
9. 11:48 AM - intercoms (Troy Scott)
10. 11:54 AM - Re: Lightweight Panel-mounted AM/FM/CD (Robert L. Nuckolls, III)
11. 12:09 PM - Re: Pondering changing fom Z-13 to Z-12 (Robert L. Nuckolls, III)
12. 12:13 PM - tools (Troy Scott)
13. 12:17 PM - MP3 input to panel mounted intercom (Charles Brame)
14. 12:27 PM - Z-14 modification (TimRhod@aol.com)
15. 12:33 PM - Re: Noise suppressing intercom (David Chalmers)
16. 12:36 PM - Re: Battery Question (Slightly off-topic) (HCRV6@aol.com)
17. 01:24 PM - ARINC X,Y,Z outputs (Jerzy Krasinski)
18. 01:49 PM - audio isolation amplifier (Troy Scott)
19. 02:28 PM - audio mixer or audio isolator or just more channels (Troy Scott)
20. 02:42 PM - Fw: Skymap III to Navaid and E.I. Fuel Flow Instrument (Steve Hamer)
21. 06:45 PM - Re: Thanks Bob (Benford2@aol.com)
22. 09:51 PM - internal regulator? (Troy Scott)
23. 09:51 PM - Sky-Tec starter (Troy Scott)
24. 10:00 PM - 17-5 (Troy Scott)
25. 10:25 PM - Ground block (Darwin N. Barrie)
26. 11:31 PM - Official Usage Guideline [Please Read] [Monthly Posting] (Matt Dralle)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Lightweight Panel-mounted AM/FM/CD Player.... |
--> AeroElectric-List message posted by: "Pete & Farrell Rouse" <pete-farrell@kc.rr.com>
Kevin,
There was an article an AVWEB by Mike Busch about installing XM radio in his
Cessna 310. The web address is as follows:
http://www.avweb.com/news/reviews/185906-1.html
I hope this helps.
Pete Rouse
----- Original Message -----
From: "Kevin Klinefelter" <kevann@gte.net>
Subject: RE: AeroElectric-List: Lightweight Panel-mounted AM/FM/CD
Player....
> --> AeroElectric-List message posted by: "Kevin Klinefelter"
<kevann@gte.net>
>
>
> Has anyone installed a satellite radio unit in their plane?
> Kevin
>
>
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: "Steve Glasgow" <willfly@carolina.rr.com>
I=92m flying with a basic Z-8 system (one 40 amp main and one SD-8) in my RV-8.
My ESS BUS is pretty much loaded up to the maximum, especially when transmitting.
When I check the SD-8, the load is almost always in the top yellow band, which
I would think is quite normal because of the ESS BUS load. The problem is that
sometimes if the load gets to high the LOW voltage light comes on and system
voltage drops to around 12.2 volts. Reducing the load will cause the voltage
to increase and the LOW voltage light goes out.
I this normal? What I mean is, as the load goes up above a certain value, does
the voltage produced start to drop?
Steve Glasgow
55 hours
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Alternator drive ratios |
--> AeroElectric-List message posted by: "Gary Casey" <glcasey@adelphia.net>
<<Well the single v belt pulleys had to be replaced with multi v belt
pulleys anyway. Then there is the warm and fuzzy of not running either
alternator faster than it spins in its oem application, which means they
have a better chance of remaining as reliable as they were in the oem
application in my opinion. These are stock alternators with no upgraded
parts or balancing. Unlike a car I don't need a lot of current at idle
although in fact my alternator speed at idle will still be higher than
in a car as I'm restricted to about 1200 engine rpm (600 prop) for the
health of my prop gearbox. I don't perceive any crippling for my
application.
I do appreciate the comments from everyone.
Ken>>
I agree with your methodology, Ken. Most automotive-type alternators are
designed to produce rated current at 4,000 to 5,000 rpm. In a passenger car
application there is always a tradeoff between idle charging, durability and
maximum speed. An alternator will survive 12,000 rpm or more, but in a car
the engine speed range is always being pushed - lower idle speeds and higher
max speeds. You would like to run the alternator at about the minimum rpm
for rated current. In most cars the most common engine speed is between
2,000 and 3,000 rpm so a 2:1 drive ratio works out pretty well. The idle
charge rate problem is helped by just oversizing the alternator. In a lot
of automotive engine installations the PSRU setup is such that the engine
will run at about 4,000 rpm during cruise and there would be no advantage in
running the alternator at 8,000 rpm. And in your case the choice of a 1200
rpm idle supports the choice to reduce the alternator drive ratio. Another
advantage of upsizing the alternator pulley is that the belt loading and
required tension go down a lot, reducing the likelihood of a belt failure,
not to mention bearing failure from high side loads.
Gary Casey
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Over-voltage, etc |
--> AeroElectric-List message posted by: klehman@albedo.net
I wouldn't think that a starter-engaged light is essential for a
personal aircraft. In most cases a glance at the voltmeter or ammeter as
soon as idle is achieved should show whether the battery is charging.
Most won't be if the starter is still spinning.
However if the starter is spinning madly and one opens the battery
contactor, is there any chance that the starter is now a generator that
could feed a short overvoltage to the rest of the electrical system? My
solid state electronics experience has been that bad things happen when
the stabilizing effect of a battery is removed from a system. Probably
part of the reason that I'm leery of battery contactors...
Ken
gotta keep it simple ;)
>Overall, I think I would vote for running the starter through a master
>switch or contactor and adding (more complexity - drats!) a
>starter-engaged warning light. Prompt detection of this failure mode
>would seem to be the
>key to saving the day.
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Microair 760 intercom |
--> AeroElectric-List message posted by: "Duncan McBride" <duncanmcbride@comcast.net>
Bob Nuckolls' wrote:
There ARE things intercom manufacturers could do. Micro-controllers
are dirt cheap nowadays. One could devise signal processing
software
to (1) concentrate on voice characteristics as signals to be
passed
along and (2) measure the ration of (1) with respect to cabin
noise
to decide when squelch should be open or closed. This kind of
intercom
would not even have a squelch control knob . . . it would be
constantly
processing cabin ambient (including your voice) for optimum
filtering
and squelch threshold setting.
FlightTech has taken a different approach. I stumbled across their website
when I was having my troubles and their description sounded really good, but
I've been working on reducing the ambient noise and enclosing the cabin
anyway before I contemplated purchasing a new intercom. See
http://www.flighttech.com/ The only thing that concerns me with an "always
open" intercom is that if it doesn't eliminate all the ambient noise, you'll
be getting it amplified all the time. Would I always be reaching for a
squelch control? And, does it co-exist perfectly with noise reducing
headsets?
I searched the archive and the only reference was an inquiry back in July
2002 and nobody had any experience with FlightTech (two t's). I would
really like to hear of any first-hand reports about the FlightTech intercoms
and the success of their approach in a high noise cabin. If anyone isn't
familiar with the Kolb, with the stock windshield arrangement it's
equivalent to a tandem open cockpit with the engine in the rear cockpit.
http://www.tnkolbaircraft.com/
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
TO_ADDRESS_EQ_REAL
--> AeroElectric-List message posted by: David Aronson <aronsond@pacbell.net>
Bob Nuckolls III:
Thanks for another year of tremendous support. I am one of the very challenged
experimental aircraft builders who, without your guidance and educational resources
(seminar, book, website and list), would never have ventured as far.
My wife and others look at the work that has been accomplished, with your help,
and ask "you didn't do that by yourself did you"? Thank you Bob for your efforts
meking our aviation efforts safer and more effective. God bless you and
Happy New Year!
Dave Aronson
N504RV
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Manual master switch |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:10 PM 12/31/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: klehman@albedo.net
>
> > What do you do if the starter contactor sticks? How
> > do you drive all the fat wires to "max cold" in anticipation
> > of an unplanned arrival with the earth?
>
>How come I never seem to hear about automotive starters getting stuck
>on? Does the accelerating flywheel more forcibly disengage the starter
>gear and contacts on those? I've had several automotive starter failures
>but don't know anyone who has had a stuck on one. Anyway a small battery
>won't last too long if it does stick which puts the risk of fire pretty
>much up to what the battery does. Since you know of at least one RG
>battery that melted in an airplane that may be a concern. Are Lycoming
>starters more prone to sticking than automotive units or just more
>talked about when it happens?
It's not the starter that sticks but the starter contactor. Contacts
within are prone to welding if badly worn or not closed with enough
velocity and force to avoid weld-inducing arcs during the closure
bounce . . .
Contactors stick in both automotive and aircraft but more commonly
in aircraft. Ring gears are smaller in airplanes putting more
torque (amps) requirement on the starter. Airplane batteries as
a class of energy storage device are poorly maintained. Further,
when pilots have their heart set on getting airborne, then tend
to keep beating on a recalcitrant engine longer than one might
in their car . . . if my car doesn't start immediately, I know
something is wrong. I've watched pilots crank airplanes unmercifully.
>Most of us have seen cars cranked until dead without a battery fire or
>meltdown... I'm talking about cranking till dead not a shorted battery
>terminal situation where all of the energy is heating the battery.
Car batteries have more volume, surface area and mass compared
to those favored for aircraft usage. You know how we are about
weight and size . . .
>I have questioned the crash scenario benefit of battery contactors as
>well. It would seem that most crashes occur during a planned takeoff or
>landing when there is very little chance of the master switch being off
>at impact anyway. Many times I've read reports where the pilot turned
>off the master while the dust was settling as he exited the wreckage.
>Granted they probably did not have a live fat wire on the starter but in
>the big picture I'm not sure that justifies an additional contactor.
A friend of mine at RAC used to investigate accidents. He
noted that virtually every crash where the battery was
ejected from the crash did not experience a post-crash fire.
"Justification" is based on perceptions of probabilities.
I doubt that there have been any learned studies of probabilities
on usefulness of master contactors . . but one thing is for
sure, if you DON'T have one, that option is not available to you
irrespective of probabilities.
>If I add all the features of Z-14 to my efi requirements, it can start to
>get cumbersome with for example at least 7 relays/contactors active
>during a start. Main efi power relay, fuel pump relay, starter solenoid,
>starter contactor, two battery contactors, and a crossfeed contactor. In
>addition there would be two relays for alternator ov protection and
>another for the second fuel pump and a couple for the redundant efi that
>will all take up space and add weight...
>
>A modified scheme with 17AH battery and a small non crank participating
>battery would be cheaper and slightly simpler but would be heavier than
>2 5AH batteries and a touch less versatile. I haven't decided which way
>to go yet.
>
>I think I understand the Z diagrams and I am not criticising them or
>suggesting there are any shortcomings in them. I am willing to accept a
>bit more (informed) risk in exchange for simplification, weight
>reduction, and less components. And my powerplant is not a standard
>installation.
The Z-diagrams are starting points to illustrate distribution
philosophies. They are not intended to establish any details
with respect to wire sizing or what items are run from which
bus. If you have data from which you can to a comparative
trade off for risks, we'd all be pleased if you would share it
with us.
> >snip
> > Why did you cripple some perfectly good alternators? What is
> > the advantage of slowing down an alternator that runs most
> > happily at high rpm? The BIG downside for generators was low
> > output at idle and taxi RPMs but if you put a smaller pulley
> > on them, the brushes would wear faster. When alternators
> > came along, all the downsides went away but you have brought
> > them back . . .
>
>Well the single v belt pulleys had to be replaced with multi v belt
>pulleys anyway. Then there is the warm and fuzzy of not running either
>alternator faster than it spins in its oem application, which means they
>have a better chance of remaining as reliable as they were in the oem
>application in my opinion. These are stock alternators with no upgraded
>parts or balancing. Unlike a car I don't need a lot of current at idle
>although in fact my alternator speed at idle will still be higher than
>in a car as I'm restricted to about 1200 engine rpm (600 prop) for the
>health of my prop gearbox. I don't perceive any crippling for my
>application.
If the larger pulley fits under your cowl and you don't
anticipate ever wanting battery-recharge capability offered
by the smaller pulley, then you could see some service
life advantages . . .
Bob . . .
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: sample Z figures |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 05:05 PM 12/31/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: Richard Tasker
><retasker@optonline.net>
>
>I, too, want to end up with the same sort of system which I am
>designing, but now I am really confused??? My Z24h shows how to add OV
>protection to an internally regulated alternator - nothing about a
>second battery there???
Got my tongue tangled around my eyeteeth and couldn't see
what I was saying. Try Z-11 and Z-30. You can add a second
battery to ANY existing battery by adding the appropriate
contactor and bus.
Bob . . .
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Bob Nuckells,
I've been studying the intercom situation for a while now, trying to find
just the right one. I want stereo hi-fi into Bose HeadsetX as well as
quiet, no-clipping intercom and radio communication. I have an SL30 Nav-Com
which has a built-in intercom. I'd like to use the built-in, but I've been
advised that because of my requirements, I wouldn't be happy with it.
Friends and avionics guys all seem to agree that I need a better intercom.
I've just read your recent (enlightening) comments about noise reduction and
control in intercoms. In my recent studies, I came across this:
The Electronic Noise Reduction feature is exclusive to FlightTech Intercoms
and allows for quiet communications without the background noise common to
Voice Operated Squelch controlled intercom. ENRI, not to be confused with
Auto-Squelch found on some other intercoms, microphones are active at all
times, ENRI monitors the background noise and eliminates it allowing only
the headset user's voice to pass.
To me, the above sounds like what you were talking about! Thoughts?
Regards,
Troy Scott
tscott1217@bellsouth.net
Glasair Super IISRG, N360TS
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Lightweight Panel-mounted AM/FM/CD |
Player....
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Player....
>
> >
> > How about scraping the CD player idea . . . you can buy some
> > REALLY compact MP3 players to which you can download lots of
> > music.
> >
>Great idea, and what I will probably do, but I assume when you say "you
>can download" that you mean either from your own CDs that you have
>converted to MP3 or from sites where the music is legitimately free or
>from sites like Apple's where you pay per tune. I suspect that not
>everyone will understand this is what you mean... :-)
The super compact MP3 players are nothing but flash memory
modules with reader hardware designed to drive headphones.
They don't "play" CD's, tapes, etc. They only play from
files that are DOWNLOADED from another source, generally
a computer. An exemplar device is shown at:
http://www.swe-tech.com.au/prod77.htm
Bob . . .
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pondering changing fom Z-13 to Z-12 |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 01:35 PM 12/31/2003 -0800, you wrote:
>--> AeroElectric-List message posted by: "Scott Diffenbaugh"
><diff@foothill.net>
>
>Hi Bob,
>
> Any idea of the minimum time it may take to resolve the SD8 regulator
>overheating concerns?
>
>As you may recall, I spent the last couple of months becoming educated on
>Z-13, and was at the point of ordering all of my Z-13 stuff, and finalizing
>my panel decisions. Nothing major left to do but the electrical and panel,
>so I am thinking of biting the 3 lb and $500 bullet
it's more than 500 delta dollars . . . you need to buy the SB-1 regulator
too . . .
> and going with Z-12 and
>SD20, since it appears the SD20 problems were anomalies. (I would add a
>support brace to the aft end of the SD20 for my peace of mind).
Be cautious about "peace of mind" additions to structural
components. The SD-20 and cousins have accumulated 100,000+
hours of successful flight history. More than one peace-of-mind
modification has created more problems than it fixed. I'm not
saying what you propose falls into this category . . . but
given the facts known to date surrounding SD-20 failures, I'd
rather not spend the time analyzing and researching a modification
for so little demonstrable value.
> I'm nstrument rated and will have full IFR goodies, but in practice I
> never fly
>"hard IFR". Any other downsides to Z-12 besides weight and $? What would
>you suggest I do? If you recommend Z-12, be forewarned, the questions will
>be forthcoming. See below:
My personal choice would be Z-13 but Z-12 is flying on thousands
of certified ships.
>On Z-12, you responded to a previous post that if the bat contactor fails,
>the E bus will be operating off of battery only. Can I hook the SD20's B
>lead to the battery side of the contactor and it's field to the bat bus?
That's a long, always hot feed wire. Not sanitary but then, it's
YOUR OBAM airplane.
>Would this give me the best of all worlds, ie with contactor closed, retain
>autoswitching and all busses? With contactor open, keep the battery charged
>while operating on the E bus, ie somewhat the same idea as Z-13? If this is
>ok, what would be a reasonable design load for the E bus?
Contactor failure is rare. Probability of contactor failure during
instances where high endurance bus loads are necessary are even
more rare. If that's a major concern for you, I'd consider Z-12, dual
battery contactors, with SD-20+FAT altenrator and eliminate the
e-bus entirely. With 20A of standby power, there's no probability
of wanting to operate battery-only and the value of a dual-feed
e-bus is diminished.
Bob . . .
Message 12
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
I see that the Aeroelectric Connection/B&C has a tool kit for the Dynon EFIS
installation. That's really cool. Now I also need some other tools called
out for the SL30 and the BMA EFIS One, etc.. Here is the list of all the
tools my installation books say I need so far:
Dynon Kit from AeroElectric/B&C
Daniels Manufacturing AF8M (for DSub)
Astro Tool part# 615708 crimp tool
Astro Tool part# 616356 positioner
ITT Cannon part# 274-7006-000 (Desc. CIET-20HD) insertion tool
ITT Cannon part# 995-0001-585 (Desc. M22520/1-01) regular duty crimp tool
ITT Cannon part# 995-0001-244 (Desc. TH25) regular duty locator tool
QUESTIONS (always):
Are some of these redundant?
What do I actually need to buy?
Regards,
Troy Scott
tscott1217@bellsouth.net
Message 13
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | MP3 input to panel mounted intercom |
--> AeroElectric-List message posted by: Charles Brame <charleyb@earthlink.net>
Bob, et.al.,
I want to use an MP3 player through my SL-10MS intercom. The intercom
has stereo music input wiring, but I am a loss as to how to wire a MP3
player to it.
Most of the MP3 players (and CD players) I have looked at only have an
output for headphones. As I understand it, you should not hook headphone
or speaker output directly to an intercom input.
How should a generic MP3 player, or any other music source, be connected
to a panel intercom system?
Charlie Brame
RV-6A N11CB
San Antonio
-----------------------------------
> Time: 11:41:53 AM PST US
> From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> Player....
> Subject: Re: AeroElectric-List: Lightweight Panel-mounted AM/FM/CD
> Player....
>
> How about scraping the CD player idea . . . you can buy some
> REALLY compact MP3 players to which you can download lots of
> music. I bought a 256MB player for Dee for Xmas. It holds
> about 80 tracks. Larger memory devices are available too.
> You can download music tracks to the player from your
> computer via USB cable. Further, the player will serve
> as a portable hard drive to carry data between multiple
> computers.
>
> Dee's unit is about 1" x 3/4" x 3" and runs on one AAA
> cell. Audio quality is good. No moving parts. Very rugged.
> No skip protection needed. Already set up to work in
> the low-level audio world (headphones).
>
> Bob . . .
>
>
Message 14
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Z-14 modification |
--> AeroElectric-List message posted by: TimRhod@aol.com
Bob: Im building an all electric velocity ( duel electronic ignition
and all electric panel) I am going to use Z-14 and I am thinking about the
following modification. I want to have an avionics bus; feed from the main bus
through a diode to the avionics bus. Another feed from the auxillary bus
through a diode to the avionics bus. No avionics master switches. Then a feed
from
each battery bus through a switch that can select which battery I want to run
off of. None, Main, or Aux. This gives me quad feed capabilities to my
flight insturments and radios. Any problem with this arrangement that I am not
seeing.
Thanks and Happy New Year Tim
PS electronic ignition will be run off of both battery busses through fuse
blocks
Message 15
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Noise suppressing intercom |
--> AeroElectric-List message posted by: "David Chalmers" <David@ChalmersFamily.com>
There is an intercom that does something similar - see http://www.flighttech.com I have been using it for 100 hours and it works. No squelch to set and it filters out engine noise even when you're talking. It does add some minor distortion at times but I'll take it over fiddling with a squelch control any day. Note that when you press the PTT it turns off the noise cancelling and pipes you voice direct to the radio - then you can really hear how much background noise it was suppressing. I asked them whether they could leave the noise suppression engaged during PTT and they said they are thinking about it. My only complaint with the unit is the tiny connector which makes wiring a challenge.
Dave
There ARE things intercom manufacturers could do. Micro-controllers
are dirt cheap nowadays. One could devise signal processing software
to (1) concentrate on voice characteristics as signals to be passed
along and (2) measure the ration of (1) with respect to cabin noise
to decide when squelch should be open or closed. This kind of intercom
would not even have a squelch control knob . . . it would be constantly
processing cabin ambient (including your voice) for optimum filtering
and squelch threshold setting.
Message 16
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Battery Question (Slightly off-topic) |
--> AeroElectric-List message posted by: HCRV6@aol.com
Happy New Year Eric.
Do not archive
Harry Crosby
Pleasanton, California
RV-6, firewall forward
Message 17
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | ARINC X,Y,Z outputs |
--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@direcway.com>
Many NAV devices like RMI or HSI require input from "any slaved
magnetic compass with ARINC X,Y,Z outputs".
I guess these are probably signals from a compass synchro, and the
question is if the synchro is 24V/400Hz or 110V/400Hz. Or are these
signals something different?
Does somebody know the answer?
Thank you,
Jerzy
>
>
Message 18
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | audio isolation amplifier |
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
I've seen the "Audio Isolation Amplifier Project" in the catalog section of
the 'Connection. Can someone please explain to what it's for?
Regards,
Troy scott
tscott1217@bellsouth.net
Message 19
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | audio mixer or audio isolator or just more channels |
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Gentlemen,
I'd rather not use a common audio panel. I'd like to use just an intercom
to route the audio from my SL30, Marker Beacon, voice prompts from the
Dynon, an MP3 player, and maybe later a second nav-com, all to my Bose
HeadsetXs. Someone recently posted here that he had used an intercom with
more "places" than he really needed in his 2-place airplane. He wrote that
he used the extra "places" (mic inputs) for the marker audio and other
inputs. This seems like a clever solution. Opinions? It has also been
suggested to me that I use an audio mixer, like the NAT Model 247 to combine
the inputs. Thoughts? Ideas? Opinions?
Regards,
Troy Scott
Message 20
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Fw: Skymap III to Navaid and E.I. Fuel Flow Instrument |
--> AeroElectric-List message posted by: "Steve Hamer" <s.hamer@verizon.net>
Does anyone know if it's okay to split the "data out" wire from the Skymap GPS
to feed info to the Navaid and the E.I. fuel flow gauge.
Thanks,
Steve
RV-6 wiring
Message 21
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: Benford2@aol.com
In a message dated 1/1/2004 11:47:01 AM Mountain Standard Time,
aronsond@pacbell.net writes:
>
> Bob Nuckolls III:
> Thanks for another year of tremendous support. I am one of the very
> challenged experimental aircraft builders who, without your guidance and
> educational resources (seminar, book, website and list), would never have ventured
as
> far. My wife and others look at the work that has been accomplished, with
> your help, and ask "you didn't do that by yourself did you"? Thank you Bob for
> your efforts meking our aviation efforts safer and more effective. God bless
> you and Happy New Year!
> Dave Aronson
> N504RV
>
I second that !!!!!!!!!!
Ben Haas N801BH..
do not archive
Message 22
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | internal regulator? |
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Gentlemen,
The alternator that came on my Demars Aero Lycoming is a B&C Part# L-60,
serial# 07504010. I'm thinking this probably does NOT have an internal
regulator, right?
Regards,
Troy Scott
tscott1217@bellsouth.net
Glasair Super IISRG, N360TS
Message 23
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Gentlemen,
The starter that came on my Demars Aero Lycoming is a Sky-Tec Model
#149-12PM. I'm guessing that the "PM" means "permanent magnet", and that I
should probably add Bob's Fig.Z-22, "Fix for 'run-on' in starters with
permanent magnet motors" to my electrical system plans. Thoughts?
Regards,
Troy Scott
tscott1217@bellsouth.net
Glasair Super IISRG, N360TS
Message 24
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Gentlemen,
First, I apologize for so many posts in one day. I've really been studying,
and that's generated a lot of questions!
For my situation, I think probably the 17-5 (Z-14) drawing, "Dual
Alternator, Dual Battery Electrical Systems" seems most appropriate. I
don't see the "essentials buss" in this scheme. Am I just missing it?, or
is no longer really necessary with this much redundancy?
Regards,
Troy Scott
tscott1217@bellsouth.net
Glasair Super IISRG, N360TS
Message 25
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
<rv7-list@matronics.com>, <RV7and7A@yahoogroups.com>
--> AeroElectric-List message posted by: "Darwin N. Barrie" <ktlkrn@cox.net>
I was preparing to order a ground block from B&C and noticed they are out of stock
till "late January." Anyone have another source for these?
Darwin N. Barrie
Chandler AZ
Message 26
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Official Usage Guideline [Please Read] [Monthly Posting] |
DNA: do not archive
--> AeroElectric-List message posted by: Matt Dralle <dralle@matronics.com>
Dear Lister,
Please read over the AeroElectric-List Usage Guidelines below. The complete
AeroElectric-List FAQ including these Usage Guidelines can be found at the
following URL:
http://www.matronics.com/FAQs/AeroElectric-List.FAQ.html
Thank you,
Matt Dralle
Matronics Email List Administrator
******************************************************************************
AeroElectric-List Usage Guidelines
******************************************************************************
The following details the official Usage Guidelines for the AeroElectric-List.
You are encouraged to read it carefully, and to abide by the rules therein.
Failure to use the AeroElectric-List in the manner described below may result
in the removal of the subscribers from the List.
AeroElectric-List Policy Statement
The purpose of the AeroElectric-List is to provide a forum of discussion for
things related to this particular discussion group. The List's goals
are to serve as an information resource to its members; to deliver
high-quality content; to provide moral support; to foster camaraderie
among its members; and to support safe operation. Reaching these goals
requires the participation and cooperation of each and every member of
the List. To this end, the following guidelines have been established:
- Please keep all posts related to the List at some level. Do not submit
posts concerning computer viruses, urban legends, random humor, long
lost buddies' phone numbers, etc. etc.
- THINK carefully before you write. Ask yourself if your post will be
relevant to everyone. If you have to wonder about that, DON'T send it.
- Remember that your post will be included for posterity in an archive
that is growing in size at an extraordinary rate. Try to be concise and
terse in your posts. Avoid overly wordy and lengthy posts and
responses.
- Keep your signature brief. Please include your name, email address,
aircraft type/tail number, and geographic location. A short line
about where you are in the building process is also nice. Avoid
bulky signatures with character graphics; they consume unnecessary
space in the archive.
- DON'T post requests to the List for information when that info is
easily obtainable from other widely available sources. Consult the
web page or FAQ first.
- If you want to respond to a post, DO keep the "Subject:" line of
your response the same as that of the original post. This makes it
easy to find threads in the archive.
- When responding, NEVER quote the *entire* original post in your
response. DO use lines from the original post to help "tune in" the
reader to the topic at hand, but be selective. The impact that
quoting the entire original post has on the size of the archive
can not be overstated!
- When the poster asks you to respond to him/her personally, DO NOT
then go ahead and reply to the List. Be aware that clicking the
"reply" button on your mail package does not necessarily send your
response to the original poster. You might have to actively address
your response with the original poster's email address.
- DO NOT use the List to respond to a post unless you have something
to add that is relevant and has a broad appeal. "Way to go!", "I
agree", and "Congratulations" are all responses that are better sent
to the original poster directly, rather than to the List at large.
- When responding to others' posts, avoid the feeling that you need to
comment on every last point in their posts, unless you can truly
contribute something valuable.
- Feel free to disagree with other viewpoints, BUT keep your tone
polite and respectful. Don't make snide comments, personally attack
other listers, or take the moral high ground on an obviously
controversial issue. This will only cause a pointless debate that
will hurt feelings, waste bandwidth and resolve nothing.
-------
[This is an automated posting.]
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|