Today's Message Index:
----------------------
1. 02:46 AM - Re: Pressure switches (Hans Teijgeler)
2. 03:10 AM - Re: Re: Blinking lights and warning sounds (Hans Teijgeler)
3. 04:12 AM - Re: AeroElectric-List Digest: Powerdiode failure mode (Jan de Jong)
4. 04:36 AM - Re: 115 vac 3 phase inverter (Gerry Holland)
5. 05:21 AM - Re: Pressure switches (AI Nut)
6. 05:39 AM - Re: Ex Pilot Question (Mickey Coggins)
7. 08:15 AM - Mixing Z13 and Z14 (Vern W.)
8. 08:24 AM - Re: Pressure switches (Vern W.)
9. 09:03 AM - Ez Pilot Question (Mickey Coggins)
10. 09:30 AM - Re: 115 vac 3 phase inverter (Dee L. Conger)
11. 10:30 AM - Re: Mixing Z13 and Z14 (Ken)
12. 11:10 AM - electric gyros (Jones, Michael)
13. 01:49 PM - Re: Pressure switches (AI Nut)
14. 02:18 PM - Re: Pressure switches (Gerry Holland)
15. 02:58 PM - Re: Voice annunciation (Gordon or Marge Comfort)
16. 07:49 PM - Re: Mixing Z13 and Z14 (Dan O'Brien)
Message 1
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| Subject: | Pressure switches |
--> AeroElectric-List message posted by: "Hans Teijgeler" <hans@jodel.com>
Definately interested!
Hans
> -----Oorspronkelijk bericht-----
> Van: owner-aeroelectric-list-server@matronics.com [mailto:owner-
> aeroelectric-list-server@matronics.com] Namens AI Nut
> Verzonden: maandag 21 februari 2005 18:17
> Aan: aeroelectric-list@matronics.com
> Onderwerp: Re: AeroElectric-List: Pressure switches
>
> --> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
>
> There is a person selling a Honeywell oil and fuel pressure sensor for
> $12 each. From what I've read, they are top quality devices. He
> apparently bought a ton of them surplus and is still selling them. I'll
> have to dig around to find his info if anyone is interested.
>
>
> Tailgummer@aol.com wrote:
>
> >--> AeroElectric-List message posted by: Tailgummer@aol.com
> >
> >
> >In a message dated 2/21/2005 6:33:31 A.M. Pacific Standard Time,
> >glcasey@adelphia.net writes:
> >
> >I have been unable (I haven't looked really hard, I'll admit) to find
> >pressure switches for fuel, oil and vacuum........
> >
> >
> >Precise Flight in Oregon sells a low vacuum warning kit (switch, tubing
> >etc.). Works just fine for the vacuum system.
> >
> > John D'Onofrio
> >
> >
>
>
>
>
>
Message 2
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| Subject: | Re: Blinking lights and warning sounds |
--> AeroElectric-List message posted by: "Hans Teijgeler" <hans@jodel.com>
Roy,
Do you have a web site for your bells and whistles stuff?
Thanks
Hans
> -----Oorspronkelijk bericht-----
> Van: owner-aeroelectric-list-server@matronics.com [mailto:owner-
> aeroelectric-list-server@matronics.com] Namens Roy Wheaton
> Verzonden: maandag 21 februari 2005 18:04
> Aan: aeroelectric-list-digest@matronics.com
> Onderwerp: AeroElectric-List: Re: Blinking lights and warning sounds
>
> --> AeroElectric-List message posted by: Roy Wheaton
> <roy_wheaton@yahoo.com>
>
> Just a thought or two: We released our monitor about 3 years ago for
> motorcycles. It monitors oil pressure, charging system, and optionally
> coolant
> temp, and sounds various loud warnings to indicate the type of failure.
> Sales
> were minimal, because riders said "I always watch my lights." This in
> spite of
> the fact that most motorcycles don't have a warning light for the charging
> system! When they became stranded because their alternator plug fell out,
> they
> became customers. It's heartwarming to hear pilots, who are trained to
> scan
> their instruments constantly, recognize the need for audible and visual
> alarms.
> We moved into developing products for ultralights and rally vehicles,
> using
> multiple response voice chips; a microprocessor monitors the various
> functions,
> and then selects a voice message which is passed through the intercom.
> There is
> NO substitute for multiple alarms. As my belt and suspender-wearing daddy
> used
> to say, "you can't be too careful..."
>
>
>
>
>
Message 3
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| Subject: | Re: AeroElectric-List Digest: Powerdiode failure mode |
--> AeroElectric-List message posted by: Jan de Jong <jan.de.jong@xs4all.nl>
Thank you, Dick
>Bottom line is that it depends on the actual construction of the diode
>in question.
>
>No guarantees. Sorry.
>
I believe you...
Jan de Jong
Message 4
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| Subject: | Re: 115 vac 3 phase inverter |
--> AeroElectric-List message posted by: Gerry Holland <gnholland@onetel.com>
Dee Hi again!
> I'm searching for a small, 28vdc to 115 vac 400hz, 3 phase inverter to power
> several very nice JET attitude gyros.
RD Aviation in UK can supply this device.
You need to contact Peter Purdy on +44 1865 841441 or
e-Mail: oxford@afeonline.com
His feedback was as follows:
3 weeks lead time on receipt of an Order.
Jet Gyro's may only need 115V AC Single Phase supply, not 3 phase.
You need to clarify this.
Approximate price between $200 -$300. (Dont quote me!)
Best of luck.
Gerry
Europa 384 G-FIZY
Panel near completion.
Dynon EFIS, KMD 150, Icom A-200 and SL70 Transponder.
PSS AoA Fitted.
http://www.g-fizy.com
Mobile: +44 7808 402404
WebFax: +44 870 7059985
gnholland@onetel.com
Message 5
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| Subject: | Re: Pressure switches |
--> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
Please bear with me regarding those sensors. The emails that I had that
info on disappeared thanks to a disk crash so I'm having to search the
hard way. I tried to buy some but kept forgetting to send the money
(long, boring story.)
Hans Teijgeler wrote:
>--> AeroElectric-List message posted by: "Hans Teijgeler" <hans@jodel.com>
>
>Definately interested!
>
>Hans
>
>
>
>
>>-----Oorspronkelijk bericht-----
>>Van: owner-aeroelectric-list-server@matronics.com [mailto:owner-
>>aeroelectric-list-server@matronics.com] Namens AI Nut
>>Verzonden: maandag 21 februari 2005 18:17
>>Aan: aeroelectric-list@matronics.com
>>Onderwerp: Re: AeroElectric-List: Pressure switches
>>
>>--> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
>>
>>There is a person selling a Honeywell oil and fuel pressure sensor for
>>$12 each. From what I've read, they are top quality devices. He
>>apparently bought a ton of them surplus and is still selling them. I'll
>>have to dig around to find his info if anyone is interested.
>>
>>
>>Tailgummer@aol.com wrote:
>>
>>
>>
>>>--> AeroElectric-List message posted by: Tailgummer@aol.com
>>>
>>>
>>>In a message dated 2/21/2005 6:33:31 A.M. Pacific Standard Time,
>>>glcasey@adelphia.net writes:
>>>
>>>I have been unable (I haven't looked really hard, I'll admit) to find
>>>pressure switches for fuel, oil and vacuum........
>>>
>>>
>>>Precise Flight in Oregon sells a low vacuum warning kit (switch, tubing
>>>etc.). Works just fine for the vacuum system.
>>>
>>> John D'Onofrio
>>>
>>>
>>>
>>>
Message 6
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| Subject: | Re: Ex Pilot Question |
--> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch>
Hi Dean,
Thanks for pointing this out. I've already wired my Trio Avionics
EZ Pilot servo, but didn't notice the recommendation to use shielded
wire on the PWM line. How the heck did I miss this? Anyway...
One question for the experts - would it hurt to have all three
lines - ground, +14v, and the PWM be in the same shielded bundle?
One concern I have is that the documentation says to ground both
ends of the shield. This seems to be in conflict with Bob's
teachings. Are autopilot servos different from strobes in this
regard?
Thanks,
Mickey
>>Question for the Trio Ez Pilot and Navaid (since they use basically the same
>>servo) folks. The installation instructions for the Ez Pilot recommend a
>>shielded wire for the PWM (servo movement commands)signal line from the
>>control head to the servo. Do I need to find some shielded wire
>
>
> . . . if the manufacturer calls it out, it's a
> reasonable thing to do.
--
Mickey Coggins
http://www.rv8.ch/
#82007 Wiring
Message 7
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| Subject: | Mixing Z13 and Z14 |
--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
I'm just a little confused and could use some guidance:
In Bob's Z13 "All Elecrtic on a Budget" schematic, the SD8 works fine for backup
even in the event of a TOTAL battery failure because it looks like the capacitor
is used for excitation of the SD8 in case it doesn't "find" a battery.
Assuming that's correct...
As long as it's possible to assure excitation of the standby alternator to
positively get power from it in case of (total) battery failure, I'm very comfortable
with going with just one battery. However, I also don't mind spending
a bit more to use the SD20 alternator as the standby instead of the SD8, but still
using the "... Budget" schematic. I really like the philosophy and practical
operation of the Z13 schematic, even more than the "split" system represented
by the Z14 schematic.
My question is: Considering the higher power output of the SD20, can you simply
replace the SD8 with the SD 20 but leave everything else the same, or, because
of the higher power output of the SD20, do I need to replace other components
as well, and even have to use the LR-3 regulator instead of the standard
voltage regulator with OV Crowbar module as is used on the original Z13 schematic?
Or perhaps I should just "cut and paste" the SD20 portion of the schematic
from the Z14 diagram onto the Z13 diagram and replace the SD8 portion of the Z13
schematic with it?
Comments?
TIA
Vern
Message 8
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| Subject: | Re: Pressure switches |
--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
Are they something like this?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=88433&item=5558782894&rd=1
Vern
----- Original Message -----
From: "AI Nut" <ainut@hiwaay.net>
Subject: Re: AeroElectric-List: Pressure switches
> --> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
>
> Please bear with me regarding those sensors. The emails that I had that
> info on disappeared thanks to a disk crash so I'm having to search the
> hard way. I tried to buy some but kept forgetting to send the money
> (long, boring story.)
>
>
> Hans Teijgeler wrote:
>
> >--> AeroElectric-List message posted by: "Hans Teijgeler"
<hans@jodel.com>
> >
> >Definately interested!
> >
> >Hans
> >
> >
> >
> >
> >>-----Oorspronkelijk bericht-----
> >>Van: owner-aeroelectric-list-server@matronics.com [mailto:owner-
> >>aeroelectric-list-server@matronics.com] Namens AI Nut
> >>Verzonden: maandag 21 februari 2005 18:17
> >>Aan: aeroelectric-list@matronics.com
> >>Onderwerp: Re: AeroElectric-List: Pressure switches
> >>
> >>--> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
> >>
> >>There is a person selling a Honeywell oil and fuel pressure sensor for
> >>$12 each. From what I've read, they are top quality devices. He
> >>apparently bought a ton of them surplus and is still selling them. I'll
> >>have to dig around to find his info if anyone is interested.
> >>
> >>
> >>Tailgummer@aol.com wrote:
> >>
> >>
> >>
> >>>--> AeroElectric-List message posted by: Tailgummer@aol.com
> >>>
> >>>
> >>>In a message dated 2/21/2005 6:33:31 A.M. Pacific Standard Time,
> >>>glcasey@adelphia.net writes:
> >>>
> >>>I have been unable (I haven't looked really hard, I'll admit) to find
> >>>pressure switches for fuel, oil and vacuum........
> >>>
> >>>
> >>>Precise Flight in Oregon sells a low vacuum warning kit (switch, tubing
> >>>etc.). Works just fine for the vacuum system.
> >>>
> >>> John D'Onofrio
> >>>
> >>>
> >>>
> >>>
>
>
Message 9
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| Subject: | Ez Pilot Question |
--> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch>
OK, thanks for the clarification!
Mickey
> With the strobe you are trying to keep the noise IN, on the servo you're
> keeping it OUT. Two different things and they are treated differently.
>
>>One concern I have is that the documentation says to ground both
>>ends of the shield. This seems to be in conflict with Bob's
>>teachings. Are autopilot servos different from strobes in this
>>regard?
>>
--
Mickey Coggins
http://www.rv8.ch/
#82007 Wiring
Message 10
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| Subject: | 115 vac 3 phase inverter |
--> AeroElectric-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
Thanks for the information - I'll contact the vendors and see what we
can come up with!
Dee L. Conger
(858) 754-3010 Direct
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gerry
Holland
Subject: Re: AeroElectric-List: 115 vac 3 phase inverter
--> AeroElectric-List message posted by: Gerry Holland
<gnholland@onetel.com>
Dee Hi again!
> I'm searching for a small, 28vdc to 115 vac 400hz, 3 phase inverter to
power
> several very nice JET attitude gyros.
RD Aviation in UK can supply this device.
You need to contact Peter Purdy on +44 1865 841441 or
e-Mail: oxford@afeonline.com
His feedback was as follows:
3 weeks lead time on receipt of an Order.
Jet Gyro's may only need 115V AC Single Phase supply, not 3 phase.
You need to clarify this.
Approximate price between $200 -$300. (Dont quote me!)
Best of luck.
Gerry
Europa 384 G-FIZY
Panel near completion.
Dynon EFIS, KMD 150, Icom A-200 and SL70 Transponder.
PSS AoA Fitted.
http://www.g-fizy.com
Mobile: +44 7808 402404
WebFax: +44 870 7059985
gnholland@onetel.com
Message 11
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| Subject: | Re: Mixing Z13 and Z14 |
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Hi Vern
I think I can answer some of your questions. You should also be able to
find several related discussions in the archives.
Permanent magnet alternators use permanent magnets instead of
electromagnets for the field magnetism. Therefore they don't need any
excitation current and they generate voltage if they are turning,
whether they are connected to a load, a battery, or nothing. The
capacitor is simply there to smooth the output and insure steady
operation of the regulator. Yes a larger capacitor (more microfarads) is
preferred with a larger alternator. A second battery like the Z-14
diagram would also smooth the output but it would be heavier and more
complicated than a capacitor.
As far as the size of alternator goes, you must decide how much current
you would want out of it after a main alternator failure. What loads
will you need to maintain? Usually not very much. With a Lycoming I'd
guess that most folks will likely find the 8 amp unit just fine to
comfortably continue flying to destination or a comfortable diversion.
With an engine that needs electronic fuel injection, 12 volt ignition, a
high pressure electric fuel pump and also will be flown IFR, then the 20
amp unit probably makes sense.
I'd guess that the two PM alternators use the same regulator but the B&C
website should have that info. Slightly larger wire may be appropriate
with the 20 amp unit but most relays and switches should work for either
unit.
Ken
Vern W. wrote:
>--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
>
> I'm just a little confused and could use some guidance:
> In Bob's Z13 "All Elecrtic on a Budget" schematic, the SD8 works fine for
backup even in the event of a TOTAL battery failure because it looks like the
capacitor is used for excitation of the SD8 in case it doesn't "find" a battery.
Assuming that's correct...
>
> As long as it's possible to assure excitation of the standby alternator to
positively get power from it in case of (total) battery failure, I'm very comfortable
with going with just one battery. However, I also don't mind spending
a bit more to use the SD20 alternator as the standby instead of the SD8, but
still using the "... Budget" schematic. I really like the philosophy and practical
operation of the Z13 schematic, even more than the "split" system represented
by the Z14 schematic.
> My question is: Considering the higher power output of the SD20, can you simply
replace the SD8 with the SD 20 but leave everything else the same, or, because
of the higher power output of the SD20, do I need to replace other components
as well, and even have to use the LR-3 regulator instead of the standard
voltage regulator with OV Crowbar module as is used on the original Z13 schematic?
> Or perhaps I should just "cut and paste" the SD20 portion of the schematic
from the Z14 diagram onto the Z13 diagram and replace the SD8 portion of the
Z13 schematic with it?
> Comments?
>
>TIA
>Vern
>
>
>
Message 12
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--> AeroElectric-List message posted by: "Jones, Michael" <MJones@hatch.ca>
hi all
i have following gyros for my kit plane rc allen dg model rca-15 and horizon
model rca-26
i am wondering what the current draw on them is so i dont have to hook up
and measure
i seem to have written down that the horizon has written on its case 14 vdc
and 1.0 amp, if this is true and using say 4ft of wire and figure 11-30 from
ac 43.13 the wire size is off the chart, so how do you size an item like
this, perhaps my amps are wrong, if not can someone explain the example i
see of 22 awg wire and 2 amp cb's
thanx
mike
murphy rebel#007
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Message 13
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| Subject: | Re: Pressure switches |
--> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
No, they were nothing like that.
Still searching. Dang it.
Vern W. wrote:
>--> AeroElectric-List message posted by: "Vern W." <vernw@ev1.net>
>
>Are they something like this?
>http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=88433&item=5558782894&rd=1
>
>Vern
>
>----- Original Message -----
>From: "AI Nut" <ainut@hiwaay.net>
>To: <aeroelectric-list@matronics.com>
>Subject: Re: AeroElectric-List: Pressure switches
>
>
>
>
>>--> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
>>
>>Please bear with me regarding those sensors. The emails that I had that
>>info on disappeared thanks to a disk crash so I'm having to search the
>>hard way. I tried to buy some but kept forgetting to send the money
>>(long, boring story.)
>>
>>
>>Hans Teijgeler wrote:
>>
>>
>>
>>>--> AeroElectric-List message posted by: "Hans Teijgeler"
>>>
>>>
><hans@jodel.com>
>
>
>>>Definately interested!
>>>
>>>Hans
>>>
>>>
>>>
>>>
>>>
>>>
>>>>-----Oorspronkelijk bericht-----
>>>>Van: owner-aeroelectric-list-server@matronics.com [mailto:owner-
>>>>aeroelectric-list-server@matronics.com] Namens AI Nut
>>>>Verzonden: maandag 21 februari 2005 18:17
>>>>Aan: aeroelectric-list@matronics.com
>>>>Onderwerp: Re: AeroElectric-List: Pressure switches
>>>>
>>>>--> AeroElectric-List message posted by: AI Nut <ainut@hiwaay.net>
>>>>
>>>>There is a person selling a Honeywell oil and fuel pressure sensor for
>>>>$12 each. From what I've read, they are top quality devices. He
>>>>apparently bought a ton of them surplus and is still selling them. I'll
>>>>have to dig around to find his info if anyone is interested.
>>>>
>>>>
>>>>Tailgummer@aol.com wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>--> AeroElectric-List message posted by: Tailgummer@aol.com
>>>>>
>>>>>
>>>>>In a message dated 2/21/2005 6:33:31 A.M. Pacific Standard Time,
>>>>>glcasey@adelphia.net writes:
>>>>>
>>>>>I have been unable (I haven't looked really hard, I'll admit) to find
>>>>>pressure switches for fuel, oil and vacuum........
>>>>>
>>>>>
>>>>>Precise Flight in Oregon sells a low vacuum warning kit (switch, tubing
>>>>>etc.). Works just fine for the vacuum system.
>>>>>
>>>>>John D'Onofrio
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>
>>
>
>
>.
>
>
>
Message 14
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| Subject: | Re: Pressure switches |
--> AeroElectric-List message posted by: Gerry Holland <gnholland@onetel.com>
> No, they were nothing like that.
Try here:
http://www.gemssensors.com/SpecTemplatePressureSwitch.asp?nProductGroupID=29
7
Regards
Gerry
Europa 384 G-FIZY
Trigear with Rotax 912 and Arplast CS Prop.
Dynon EFIS, KMD 150, Icom A-200 and SL70 Transponder.
PSS AoA Fitted.
http://www.g-fizy.com
Mobile: +44 7808 402404
WebFax: +44 870 7059985
gnholland@onetel.com
Message 15
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| Subject: | Voice annunciation |
--> AeroElectric-List message posted by: "Gordon or Marge Comfort" <gcomfo@tc3net.com>
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Glen
Matejcek
Subject: AeroElectric-List: Voice annunciation
This thread about bells, whistles, chirps and voices reminds me of an
incident more or less 40 years ago four of us were having quartet
practice, in the days when beer cans were thicker than tissue paper and
the pull tabs came off of the cans. I was idly popping the head of a
can in and out like a halloween cricket when our bass singer said "I've
been looking for that kind of sound". At the time he worked for
Gray-Faraday and they were trying to devise a unique sound for a warning
system for commercial aircraft. We talked a bit about how it might be
done and a couple weeks later he came to practice with a prototype unit.
It went into production and one application for what became known as a
"clacker" was as an overspeed warning on Boeing 737's. Whether or not it
was used anywhere else, I have no idea but the search for distinctive
methods of warning has been underway for quite a while. This fits the
category of more or less useless information.
Gordon Comfort
N363GC
Message 16
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| Subject: | Re: Mixing Z13 and Z14 |
--> AeroElectric-List message posted by: "Dan O'Brien" <danobrien@cox.net>
Vern,
I had the same question a couple years ago. The following exchange with
Bob helped me. I decided to go with Z-14.
>I am planning on using the SD-20 so I can have a little
>more juice in the event of main alternator
>failure (to cover pitot heat, for example.)
>How should Z-13 be modified to wire in the SD-20 instead
>of the SD-8?
Bob wrote:
How about a variation on Z-14. Use S704-1 relays for
a low current (30A) cross-feed, and as the battery
relay for a small (6 a.h. or so) battery to stabilize
the SD-20 when the cross-feed is open. Use the Aux
Bus as you would the E-bus and put all the main-alt-out
en route loads on the Aux Bus. You wouldn't close the
cross-feed during cranking in this case so a single
pole, single throw cross-feed switch would suffice.
>What would be wrong with modifying Z-13 by replacing the
>SD-8 with an SD-20 and running the B-lead to the battery
>side of the battery contactor (as with the SD-8)?
>Wouldn't this avoid the need for a 2nd battery while also
>removing the the contactor as a single point of failure?
Bob wrote:
You could do that too...It
wouldn't be my choice of architectures.
I wrote:
Why not?
Bob wrote:
If I were going to spend the extra dollars to get the
higher capability of the SD-20, I think I'd go ahead
and take it the small additional step to provide 100%
isolation between the two systems.
Bob . . .
Hope this helps,Dan
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