Today's Message Index:
----------------------
1. 05:43 AM - Re: Re: Z-13/Z-30 (Vern W.)
2. 06:56 AM - "Air" Switch & Antenna Ground Plane (Bill Denton)
3. 07:12 AM - Re: Re: Z-13/Z-30 (Hinde, Frank George (Corvallis))
4. 08:02 AM - Re: More than 1 audio source into the Intercom (Phil Birkelbach)
5. 08:02 AM - Re: "Air" Switch & Antenna Ground Plane (bniles@cfl.rr.com)
6. 08:09 AM - Re: Re: Heated pitot (bniles@cfl.rr.com)
7. 07:03 PM - Re: Re: Z-13/Z-30 (Bob Barrow)
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 |
|
--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
----- Original Message -----
From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
Subject: AeroElectric-List: Re: Z-13/Z-30
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<nuckollsr@cox.net>
>
> At 08:39 AM 6/8/2005 -0500, you wrote:
>
> >--> AeroElectric-List message posted by: Paul Folbrecht
> ><paulfolbrecht@yahoo.com>
> >
> >Vern W. wrote:
> >
> > >--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
> > >
> > > My preference is for the Z-13 architecture, but I'm pretty sure it
was
> > >Bob N. himself who stated that the SD-8 MUST have a battery to excite
it. It
> > >will not power up by itself.
> > > So what I have sort of settled on is the Z-13 plus the Z-30
additional
> > >battery (very small, say 4 amp) which does three things: It gives the
SD-8
> > >something to lean on to get it started if need be, the small additional
> > >battery can be use to keep (full voltage) power on my Lightspeed
ignition
> > >when starting, and if both the main alternator and the primary battery
go
> > >offline, the 4 amp battery with the SD-8 is plenty to keep all the
important
> > >systems (and then some) up and running as long as needed.
> > > My big "problem" with just one battery is not the RG battery's
> > >dependability in general, but the (very?) possible occurance of a
broken
> > >terminal. I know that's a "full bucket" as Bob says, but a broken
battery
> > >terminal definitely qualifies as a "single point of failure" which we
are
> > >all using as our baseline in electrical design.
> > >
> > >
> >
> >How about two batts *in parallel*? That is, straight Z-13 with no Z-30
> >circuit but with two identical batts wired parallel. Eliminates the
> >terminal concern and an open cell as well.
>
> How about the failed battery contactor?
Absolutely, Bob. All that would do is to trade off 1 SPF for another.
>
> > But this doesn't seem to be
> >a popular configuration. At least not from a search of the archives.
> >What am I missing? A shorted cell would still be disastrous but that is
> >far less likely and could be gotten around too. If I'm missing nothing
> >with this idea, than Z-13 with the SD-8 is what I'll do.
>
> If one is going to gather up concerns for open and shorted cells
> in well maintained RG batteries, then open control wires, failed
> master switches, loose nuts and bolts, and failed contactors should
> all be added too . . .
Of course, but any single failure of those kind of issues will still result
in some available power, ESPECIALLY if one has the availability of an
alternate exciter for the SD-8 (i.e., by adding the Z30 to Z13)..
>
>
> > > I've seen some posters go a bit further and worry about scenarios
of
> > >multiple failures, but the probabability of any more than one critical
> > >failure in a single flight is in the nth degree of possibility. If I
lose my
> > >main battery, my main alternator goes over voltage, the SD-8 won't
start, I
> > >start to smell smoke, and my one mag on the other side fails, and all
this
> > >happens exactly while I'm flying on top a mountain range, then I'm
simply
> > >going to assume that I have gotten a personal invitation from God to
meet
> > >Him face to face which will allow me to enjoy the ride down :-)
> > >
>
> Or perhaps you have Joe Btfsplk stowed away in your baggage
> compartment . . . See:
I have gone through some short periods in my life where I'm sure he was my
traveling companion so I'm familiar with the gentleman.
I'll bet no one under 45 years old knows what we're talking about and who
Joe Btfsplk is :-) oh, wait, that's :-(
>
> http://www.bookofjoe.com/2005/02/joe_btfsplk.html
>
> He rode with us on the Plymouth, MA seminar trip. Missed
> connections outbound, got a smoking room a 1 a.m. with
> not enough energy left to wrestle with the desk clerk,
> temperature was in 90's with fog (humidity 100%),
> a/c in meeting room was fritzed, slipped and went down
> in shower for non-smoking room (buggered right arm . . .
> a real handicap when you gotta wave your arms in front
> of a class!), missed connections outbound and spent
> night in Detroit, got home today 13 hrs late to learn
> that DERs are going to give me a ration of stuff about
> flying test equipment on customer airplane that I can't
> fix without the data . . .
>
> If it hadn't been for an exemplary bunch of seminar
> attendees, I would have come home really bummed out.
> All things considered . . . a great weekend!
>
> However, if you check the baggage compartment before
> departure and find the little guy in the black hat
> is absent, then the vast majority of what we worry
> about should be Wwwaaaaaayyyyyy down on the list of
> concerns.
>
>
> >
> > >
> >I made a similar comment in response to Bob earlier in this thread. :->
> >Can't fight the big guy if he's got your number!
> >
> >
> > > In the end, I'd be just as confident to fly with the Z-19 design as
much
> > >as the Z-13 + Z-30 design. While Z-19 is cheaper, it's a lot more
weight
> > >that I won't need in my RV7-A.
> > > I'm not totally decided yet being that I won't have to start
installing
> > >a chosen system until later this Fall, but Z-13 + Z30 looks good to me.
Now
> > >if Bob would only add the Z-30 extra battery to the Z-13/SD-8 drawing
and
> > >show it as one sheet...
>
> See http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdf/Z13-30.pdf
>
> Bob . . .
So, you thought maybe there was something to it and decided to draw it, eh?
:-)
Thanks Bob!
>
>
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 |
|
| Subject: | "Air" Switch & Antenna Ground Plane |
--> AeroElectric-List message posted by: "Bill Denton" <bdenton@bdenton.com>
A couple of questions...
In researching Transponders, many of the Install Manuals reference the use
of an "Air Switch" to switch the Transponder in and out of Standby mode as
the aircraft's airspeed crosses 30 kts+/-. Does anyone know anything about
these Air Switches and/or a source for them?
Will the aluminum and steel structure of a fabric-covered aircraft make a
suitable ground plane for the various antennas to be used on the airplane?
Thanks!
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 |
|
--> AeroElectric-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
Now I thought someone on this list talked to B&C who said the SD-8 would
self excite??
Remember also that if you did have a battery terminal break, your main
alternator will still provide power and keep the battery contactor
closed.
Personally I intend to connect the SD-8 directly to the battery buss (I
have a electrically dependant airplane) so assuming it will self excite
it takes care of the failure of both the battery terminal and a failed
#1 alternator.
Am I out to lunch here??
Frank
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Vern
W.
Subject: Re: AeroElectric-List: Re: Z-13/Z-30
--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
----- Original Message -----
From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
Subject: AeroElectric-List: Re: Z-13/Z-30
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<nuckollsr@cox.net>
>
> At 08:39 AM 6/8/2005 -0500, you wrote:
>
> >--> AeroElectric-List message posted by: Paul Folbrecht
> ><paulfolbrecht@yahoo.com>
> >
> >Vern W. wrote:
> >
> > >--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
> > >
> > > My preference is for the Z-13 architecture, but I'm pretty sure
it
was
> > >Bob N. himself who stated that the SD-8 MUST have a battery to
excite
it. It
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: | Re: More than 1 audio source into the Intercom |
Music Input -
--> AeroElectric-List message posted by: Phil Birkelbach <phil@petrasoft.net>
That is what I did with my DRE intercom. I needed to get the AOA
warning into the unit and the DRE mutes the music input when something
comes on the COM input. Another thing to think about is the Pilot
Isolate Mode. I can let the passenger listen to the music and not the
COM, and I can have COM and not music. If the warning sounds were on
the music input I can isolate myself from them and not hear them at all.
I just used a simple passive mixing circuit that an engineer at DRE
sketched and sent to me.
BTW a plug for DRE: That engineer sketched the circuit for me even
though he knew that I did not buy the unit from them. I got it off of
Ebay. I have had great dealings with them. Oh and the intercom sounds
awesome!!!!
Godspeed,
Phil Birkelbach - Houston Texas
RV-7 N727WB - Finishing Up
http://www.myrv7.com
Bill Denton wrote:
>--> AeroElectric-List message posted by: "Bill Denton" <bdenton@bdenton.com>
>
>Something to think about...
>
>"The PS Engineering PS 1000 II has an input impedance of 47 kOhm (music
>input)..."
>
>Another thing that the music input typically has is some sort of "muting"
>function, either partial, or full. The way this muting works, when the COM
>input is active, the volume on the music input is lowered. Which would
>result in the volume of the alarms also being lowered during COM
>transmissions.
>
>What I am considering doing is "mixing" all of my alarm outputs with the COM
>output, and feeding them into the COM input, so there would be no muting. I
>would then use the music input as a music input.
>
>I'm considering building one of Bob's Audio Isolation Amps to do the mixing,
>but if anyone knows of a reasonably priced "store-bought" unit I would
>appreciate hearing about it...
>
>
>
>
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: "Air" Switch & Antenna Ground Plane |
--> AeroElectric-List message posted by: bniles@cfl.rr.com
Many airports now want transponders on for all ground movement. If
not I would just use STBY. If you forget, DEP control will remind you.
----- Original Message -----
From: Bill Denton <bdenton@bdenton.com>
Subject: AeroElectric-List: "Air" Switch & Antenna Ground Plane
> --> AeroElectric-List message posted by: "Bill Denton"
> <bdenton@bdenton.com>
> A couple of questions...
>
> In researching Transponders, many of the Install Manuals reference
> the use
> of an "Air Switch" to switch the Transponder in and out of Standby
> mode as
> the aircraft's airspeed crosses 30 kts+/-. Does anyone know
> anything about
> these Air Switches and/or a source for them?
>
> Will the aluminum and steel structure of a fabric-covered aircraft
> make a
> suitable ground plane for the various antennas to be used on the
> airplane?
> Thanks!
>
>
>
>
>
>
>
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 |
|
| Subject: | Re: Heated pitot |
--> AeroElectric-List message posted by: bniles@cfl.rr.com
I recently got my heated pitot from Gretz Aero. It looks nice and has
a multi light monitoring system. Have not mounted it yet, though.
----- Original Message -----
From: courierboy@earthlink.net
Subject: Re: AeroElectric-List: Re: Heated pitot
> --> AeroElectric-List message posted by: courierboy@earthlink.net
>
> Wow -
>
> Nicely done.
> All this and Leonard Cohen too . . ? ! !
> You provide neat stuff and good commentary.
>
> Thanks Eric -
> Bill
> do not archive
>
>
> >--> AeroElectric-List message posted by: "Eric M. Jones"
> <emjones@charter.net>>--------snip-------------------
> >For several years I've been New-England-Ice-Storm testing a
> thermostatic>pitot tube for my Glastar that operates at 36W max.
> One of the odd
> >characteristics is that it heats up only to 30 degC, so it
> doesn't even get
> >to body temperature. When there is no need for heat, it draws
> only about 3W
> >(~250 mA). It's on my website if you're interested.
> >http://www.periheliondesign.com/downloads/thermopitot.pdf
> >
> >Regards,
> >Eric M. Jones
> >www.PerihelionDesign.com
> >113 Brentwood Drive
> >Southbridge MA 01550-2705
> >(508) 764-2072
> ---------------snip-------------
>
>
>
>
>
>
>
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 |
|
--> AeroElectric-List message posted by: "Bob Barrow" <bobbarrow10@hotmail.com>
Frank, the SD8 will not self excite. Period. And even if it is running it
may not reliably continue to do so without a battery connected.
>From: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
>Reply-To: aeroelectric-list@matronics.com
>To: <aeroelectric-list@matronics.com>
>Subject: RE: AeroElectric-List: Re: Z-13/Z-30
>Date: Wed, 17 Aug 2005 07:09:15 -0700
>
>--> AeroElectric-List message posted by: "Hinde, Frank George (Corvallis)"
><frank.hinde@hp.com>
>
>Now I thought someone on this list talked to B&C who said the SD-8 would
>self excite??
>
>Remember also that if you did have a battery terminal break, your main
>alternator will still provide power and keep the battery contactor
>closed.
>
>Personally I intend to connect the SD-8 directly to the battery buss (I
>have a electrically dependant airplane) so assuming it will self excite
>it takes care of the failure of both the battery terminal and a failed
>#1 alternator.
>
>Am I out to lunch here??
>
>Frank
>
>-----Original Message-----
>From: owner-aeroelectric-list-server@matronics.com
>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Vern
>W.
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: Re: Z-13/Z-30
>
>--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
>
>
>----- Original Message -----
>From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
>To: <aeroelectric-list@matronics.com>
>Subject: AeroElectric-List: Re: Z-13/Z-30
>
>
> > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><nuckollsr@cox.net>
> >
> > At 08:39 AM 6/8/2005 -0500, you wrote:
> >
> > >--> AeroElectric-List message posted by: Paul Folbrecht
> > ><paulfolbrecht@yahoo.com>
> > >
> > >Vern W. wrote:
> > >
> > > >--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
> > > >
> > > > My preference is for the Z-13 architecture, but I'm pretty sure
>it
>was
> > > >Bob N. himself who stated that the SD-8 MUST have a battery to
>excite
>it. It
>
>
SEEK: Over 80,000 jobs across all industries at Australia's #1 job site.
http://ninemsn.seek.com.au?hotmail
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! --
|