Today's Message Index:
----------------------
1. 05:24 AM - Re: Early Aviation Radios 0.00 FORGED_RCVD_HELO Received: contains a forged HELO 1.40 DATE_IN_FUTURE_96_XX Date: is 96 hours or more after Received: date (luckymacy@comcast.net (lucky))
2. 05:47 AM - Wiring ARC IN-514R (William Bernard)
3. 09:49 AM - Re: Wiring ARC IN-514R (GMC)
4. 04:12 PM - What's a "Watt"? (Ronald J. Parigoris)
5. 05:03 PM - Re: What's a "Watt"? (Brian Lloyd)
6. 08:42 PM - Re: Harbor Freight has $20 Battery Maintainer 0.00 FORGED_... (WRBYARS@aol.com)
7. 08:59 PM - Re: Metallic Paint and built in antennas (Bristolsabre@aol.com)
8. 09:09 PM - Re: Metallic Paint and built in antennas (Bristolsabre@aol.com)
9. 10:57 PM - Driving electronic rpm meter from both magnetos (Jerzy Krasinski)
10. 11:28 PM - New Magazine (Larry & Gerry)
Message 1
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| Subject: | Re: Early Aviation Radios 0.00 FORGED_RCVD_HELO |
Received: contains a forged HELO 1.40 DATE_IN_FUTURE_96_XX Date: is 96 hours
or more after Received: date
--> AeroElectric-List message posted by: luckymacy@comcast.net (lucky)
If you go to the Udvar-Haasy Virginia location of the Smithsonian Air And Space
Museum you will see what I think they advertise as the earliest US airborne radio
system as well as the literally rickety crates they were in. In fact, the
history of comm and nav gear is a predominent part of the museum as well as more
historical engines in one place than I've ever seen by far. Some of them
cut up for internal viewing. The early radios were massive/heavy by today's standards
but to see one in person which took up the space of a small kitchen table
shoe horned into one of those crates with the little wind mill power generator
out the sides of the planes is almost comical. Those guys had guts and
drive, that's for darn sure. They have a decent web site and the info might even
be on that for those interested.
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <b.nuckolls@cox.net>
>
> At 03:00 PM 10/29/2004 -0400, you wrote:
>
> >--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
> >
> >
> > > --> AeroElectric-List message posted by: echristley@nc.rr.com
> > >
> > >
> > >>
> > >> Did you know that electrical systems were being
> > > placed on airplanes
> > >> as early as 1915? Less than 10 years after the
> > > Brothers sold the
> > >> Army its first airplane, they were running radio
> > > transmitters into
> > >> trailing wire antennas powered by wind driven
> > > generators?
> > >>
> > >> Bob . . .
> > >>
> > >
> > > Say, WHAT?!
> > >
> > > Was it actual voice systems or morse code?
> >
> >Code. They were spark transmitters but I believe they used
> >vacuum-tube-based receivers. Tube-based CW transmitters didn't show up
> >really until the end of WW-I. Voice transmission started a few years
> >later.
>
> The 1919 airborne radios were indeed CW transmitters only. The
> reference I found talked about a 25 mile range. I'm pretty
> sure these would have been vacuum tube. Although the DH5
> was a honk'n big airplane for the time, a wind driven generator
> big enough to spin up a spark rig would have really draggy
> and the equipment would have been REALLY heavy.
>
> This article:
>
> http://earlyradiohistory.us/sec011.htm
>
> speaks to vacuum tube transmitters as laboratory curiosities
> as early as 1914. Marconi demonstrated voice transmissions
> with vacuum tubes in 1915
>
> http://earlyradiohistory.us/1915mwt.htm
>
> and this music transmission in 1916
>
> http://earlyradiohistory.us/1916powr.htm
>
> Here's a really cool collection of articles
>
> http://earlyradiohistory.us/
>
> I'm still looking for how they developed high voltage
> for the tubes . . . Some ol' gray beards at RAC
> suggested dual commutator generators. Armatures
> like the old dynamotors have two windings. A low
> voltage winding that was regulated for filaments,
> and a second winding with commutator on other end
> of stack for high voltage.
>
> Bob . . .
>
>
> ---
>
>
>
>
>
>
Message 2
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| Subject: | Wiring ARC IN-514R |
--> AeroElectric-List message posted by: "William Bernard" <billbernard@worldnet.att.net>
I have an ARC IN-514R CDI that I would like to wire to show course deviation from
an apollo GX-55 gps. (There is a plane on the field with this indicator wired
to a flybuddy, but the man who wired it is no longer in the area.)
The owner says tht the display is similar to a localizer in that the needle simply
moves left or right and the flag always show 'to'. Setting a couse has no
effect using the OBS has no effect.
I think that the nav left and right pins on the GX55 could be wired to the loc
left and right pins on the IN-514R and the TO & FROM pins wired together. My
question is is there anything else? There are also "nav valid +" and "nav valid
-" pins on the GX55 that seem to have no logical place on the IN-514R and there
is a ground pin and a wiper arm pin on the IN-514R that seem to have no logical
connection to the GX55.
Also, Does anyone know of a source for the cannon plug to fit the back of the IN-514R?
Thanks for the help.
Bill
Message 3
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| Subject: | Wiring ARC IN-514R |
--> AeroElectric-List message posted by: GMC <gmcnutt@shaw.ca>
Hi Bill
My avionics technician did this conversion for me so I cannot give you
specifics about wires. I am using the indicator with a UPS SL-60 which
should have the same outputs as your GX55. All outputs should be shown in
the GX55 installation manual.
Getting the connector may be difficult, they are getting scarce, try
watching e-bay.
The left/right function works normally and the sensitivity is controlled
within the GPS by the enroute/terminal/approach modes. If these are not
automatic in the GX55 leave it set at Terminal (one mile) mode.
The to/from and off flags work same as a VOR and changes To/From if waypoint
is on "hold". If not in "waypoint hold" mode you will not see a "from"
indication as the GPS will be going "to" the next waypoint.
The OBS knob has been removed, the hole plugged and the internal VOR numbers
blanked out, it makes a nice GPS indicator. I was charged $90 Cdn so it must
be a 1-2 hr job.
George in Langley BC.
-----Original Message-----
Subject: AeroElectric-List: Wiring ARC IN-514R
--> AeroElectric-List message posted by: "William Bernard"
<billbernard@worldnet.att.net>
I have an ARC IN-514R CDI that I would like to wire to show course deviation
from an apollo GX-55 gps. (There is a plane on the field with this indicator
wired to a flybuddy, but the man who wired it is no longer in the area.)
The owner says tht the display is similar to a localizer in that the needle
simply moves left or right and the flag always show 'to'. Setting a couse
has no effect using the OBS has no effect.
I think that the nav left and right pins on the GX55 could be wired to the
loc left and right pins on the IN-514R and the TO & FROM pins wired
together. My question is is there anything else? There are also "nav valid
+" and "nav valid -" pins on the GX55 that seem to have no logical place on
the IN-514R and there is a ground pin and a wiper arm pin on the IN-514R
that seem to have no logical connection to the GX55.
Also, Does anyone know of a source for the cannon plug to fit the back of
the IN-514R?
Thanks for the help.
Bill
Message 4
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| Subject: | What's a "Watt"? |
--> AeroElectric-List message posted by: "Ronald J. Parigoris" <rparigor@suffolk.lib.ny.us>
Have been doing foolish things as of late, like thinking about radios and stuff
to populate
the panel of a Europa XS.
I am pretty naive about RF.
As far as DC goes, a Watt = Voltage x Current. Looking in a Pocket Reference
guide there
is only 1 conversion table for Watts.
With Aircraft Transceivers, there is more DC Watts going in than the Watts coming
out.
With Aircraft Transponders, there is a lot more Watts coming out than DC Watts
going in.
What's a Transceiver Watt?
What's a Transponder Watt?
Perhaps with a Radio it is a Watt hour or Watt second?
Thanks.
Ron Parigoris
Message 5
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| Subject: | Re: What's a "Watt"? |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
On Oct 30, 2004, at 7:09 PM, Ronald J. Parigoris wrote:
> --> AeroElectric-List message posted by: "Ronald J. Parigoris"
> <rparigor@suffolk.lib.ny.us>
>
> Have been doing foolish things as of late, like thinking about radios
> and stuff to populate
> the panel of a Europa XS.
>
> I am pretty naive about RF.
>
> As far as DC goes, a Watt = Voltage x Current. Looking in a Pocket
> Reference guide there
> is only 1 conversion table for Watts.
That is correct but it works for volts and amps in AC/RF as well as DC.
>
> With Aircraft Transceivers, there is more DC Watts going in than the
> Watts coming out.
That is because the radio is less that 100% efficient in its conversion
of DC power into RF power. The different is what makes your radio
warm.
>
> With Aircraft Transponders, there is a lot more Watts coming out than
> DC Watts going in.
That is because that, while the transponder puts out a lot of watts, it
is for a very short duration (milliseconds) so while the peak power
output is something like 200W, the average is well under 1W. So even
the transponder is converting excess power into heat as not all the
power coming in goes out to the antenna.
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
+1.340.998.9447 St. Thomas, VI 00802
There is a time to laud one's country and a time to protest. A good
citizen is prepared to do either as the need arises.
Message 6
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| Subject: | Re: Harbor Freight has $20 Battery Maintainer 0.00 |
FORGED_...
--> AeroElectric-List message posted by: WRBYARS@aol.com
I checked several and found the following one to be what I considered the
bestest with the mostest.
Bill
vdcelectronics.com
Message 7
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| Subject: | Re: Metallic Paint and built in antennas |
--> AeroElectric-List message posted by: Bristolsabre@aol.com
Bob,
Thanks for taking the time, I have been away all weekend to a flyin in
Sebring and an airshow at NAS JAX so I only just received your comment.
Of course I could paint the tailfeathers with ordinary paint, but this being
a Mustang replica I had planned on using silver metallic as a base.
I have found base metallic with clear coat that looks very much like alu.
Regards
T S Bristol
FEW TF51
Message 8
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| Subject: | Re: Metallic Paint and built in antennas |
--> AeroElectric-List message posted by: Bristolsabre@aol.com
Thanks for the info, but in my experience from painting a few cars, it
contains aluminum.
The small metal particles tend to sink to the bottom if you delay spraying.
This is European paint (Standox and Spies Heckert) which also seems much more
aluminumlike than what I have seen here in the US. This of course is the strong
stuff, not the waterbased stuff the use on cars nowdays.
The FEW prototype was more like grey. But I will check with Standox when I
get back to Norway.
Regards
T S Bristol
Message 9
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| Subject: | Driving electronic rpm meter from both magnetos |
--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@provalue.net>
Bob,
I use electronic rpm meter for the engine, and the problem is how to
trigger the meter in order to have indications of rpm while switching
from one magneto to the other.
The simplest, but a crude way would be to add a switch selecting the
magneto providing the signal to rpm meter.
A diode from the P wire to the meter input (for each of the magnetos)
would do the same automatically. But here comes a question - what is the
peak voltage on the P wire during operation of the magneto? Also, that
might be not the safest way, with blown diodes funny things might happen.
A resistor from each P wire to the meter input (for each of the
magnetos) would form a voltage divider by a factor of 2 in case when
one P wire is grounded. The resistor must be not too small in order not
to damp the coil of the magneto. Do you know what would be the lower
limit of the resistance that can be safely connected to the P wire
without significant reduction of the spark energy? I guess this
approach would be safer than with the diodes.
I wonder if you have a recommended diagram for driving an electronic rpm
meter from both magnetos?
Thank you,
Jerzy
Message 10
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--> AeroElectric-List message posted by: "Larry & Gerry" <psychden@sonic.net>
If you have been thirsting for the content of Sport Aviation ala previous editor Jack Cox and found the recent efforts wanting, check out www.extech.com. I just saw the first issue and it's promising to fill a big gap in what builders are interested in to improve the OBAM community. Larry Ford, VP CAFE Foundation, Glasair I RG N149LF 250 hrs Do not archive
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