Today's Message Index:
----------------------
1. 05:53 AM - Re: P-Leads for a Seawind (Robert L. Nuckolls, III)
2. 06:08 AM - Re: Re: New Over-Voltage Protection Architecture (Robert L. Nuckolls, III)
3. 06:12 AM - Re: New Over-Voltage Protection Architecture (Eric M. Jones)
4. 07:12 AM - Re: Marker Beacon Remote Indicators? (Sam Marlow)
5. 07:29 AM - Re: New Over-Voltage Protection Architecture (user9253)
6. 07:52 AM - Re: Re: New Over-Voltage Protection Architecture (Roger & Jean)
7. 12:18 PM - Re: Marker Beacon Remote Indicators? (BobsV35B@aol.com)
8. 12:44 PM - Re: Marker Beacon Remote Indicators? (BobsV35B@aol.com)
9. 12:56 PM - Re: Marker Beacon Remote Indicators? (Sam Marlow)
10. 03:29 PM - Re: Marker Beacon Remote Indicators? (BobsV35B@aol.com)
Message 1
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| Subject: | Re: P-Leads for a Seawind |
At 12:58 AM 3/25/2014, you wrote:
Thanks for taking an interest. I called LyCon in Visalia, Ca. where I
had the engine modified and he clued me the type # is 66LN-21
and he had the parts in stock. They're on the way.
Good show . . .
I'll get 50ft. of 20 AWG MIL-C-27500 & I'm good to go.
Agreed . . .
I could still use some advice as to how to connect to a TinyTach at the panel.
GRT has me pick off tach signal from ea. mag p-lead at the engine
through a 39 or 27Kohm resistor, claims the resistor will blow like a
fuse if anything shorts in their EIS
TinyTach wants 5 to ten turns of the core wire of their coax around
one plug wire just inside the cap on the mag. Mechanically, this is
not so hot, as there is a rubber sealing plug between the plug wire
insulator and the socket of the mag holding supercharger pressure.
How do I reconcile 200v or so of high p-lead current with 30kv or so
of low current at a plug wirefor a direct connection? For an extra
10bucks. TinyTach will supply enough wire to get back to the engine.
Would it be satisfactory to cut the shield of a plug wire outside of
the mag, wrap their 5 to 10 turns of insulated "antenna" coax core
around the plug insulator, and cover it back up with braid and solder
sleeves? Sounds pretty messy, doesn't it? I sure would like to pick
the signal off clean at the ignition switch.
This supplier is oblivious to the nature
of the stuff he's attempting to monitor.
He also doesn't understand the way things
are done on airplanes.
Tell him that's where you want to sample
engine rpm . . . on wires that are already
in place. Adding new wire from a plug wire
is not only sloppy, it's an invitation
to radiated ignition noise.
Is this your ONLY tach option? The whole
world builds tachs. I'd dump this product.
The $time$ your going to spend to educate
him and perhaps to adapt his product to your
airplane is more than the tach is worth.
Bob . . .
Message 2
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| Subject: | Re: New Over-Voltage Protection Architecture |
At 11:57 AM 3/24/2014, you wrote:
>
>There has been a recent discussion on VansAirforce about
>over-voltage
>problems. http://www.vansairforce.com/community/showthread.php?t=111102
>Since over-voltage protection does not cost much or weigh much, I
>think that it is worthwhile having, considering the damage that
>could be done by too high voltage.
Have you cited the right thread? These postings are all
dated back in the 2007-08 time frame.
Long time members on the List will recall some
exchanges with Paul M who was really excited
about crowbar shutdown techniques . . . he
railed on for years choosing to ignore thousands
of applications for the technique in both
experimental and certified aircraft.
Seems some of his buddies tried to build the
DIY circuit and had some nuisance tripping problems.
I made some modifications to the circuit based on
their valuable feedback. But in any case, like
any device that 'triggers on a voltage threshold'
there are physical constraints for reliable performance
not the least of which is compact size and perhaps
metallic, grounded enclosure.
The etched circuit board for the production
version is only about .6" wide by 1" long
and takes surface mount components. VERY small
aperture for potentially offending signals.
Bob . . .
Message 3
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| Subject: | Re: New Over-Voltage Protection Architecture |
Sensitron, a NY based manufacturer of electronic modules for aircraft, used to
make a really beefy transient voltage suppressor. I recall it was thousands of
dollars and was potted into a heatsink. It did OVP and/or load dump prevention
with one basic part...parallel zeners I think.
They also make solid-state relays and assorted electro-whizzies mostly for 28V
military aircraft. They have a great catalog worth perusing.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=420982#420982
Message 4
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| Subject: | Re: Marker Beacon Remote Indicators? |
BobsV35B@aol.com wrote:
> Good Afternoon Bob and Bill,
> May I ask why you want the marker beacon indication? It is/was part
> of the low frequency range system which was shut down over sixty years
> ago. It has been retained for use with a few ILSs and some NDB
> approaches, but such use is rapidly being discontinued.
> I know of no fix designated by a marker beacon that cannot be found
> via some other legal IFR data.
> That is especially true if one has an IFR approved GPS installed.
> There is nothing wrong with having a marker beacon receiver installed,
> but you can eliminate an antenna and some wiring by getting rid of it.
> You might even be able to save some panel space.
> My vote is to forget about the marker Beacon Receiver. <G>
> Happy Skies,
> Old Bob
> *
>
>
> *
We at the airlines still use them on Cat2 approaches..................
Message 5
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| Subject: | Re: New Over-Voltage Protection Architecture |
> Have you cited the right thread? These postings are all
> dated back in the 2007-08 time frame.
Hmm, the link works for me. http://www.vansairforce.com/community/showthread.php?t=111102
All 12 posting in this thread are from the last 2 or 3 days.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=420992#420992
Message 6
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| Subject: | Re: New Over-Voltage Protection Architecture |
>
>> Have you cited the right thread? These postings are all
>> dated back in the 2007-08 time frame.
>
> Hmm, the link works for me.
> http://www.vansairforce.com/community/showthread.php?t=111102
> All 12 posting in this thread are from the last 2 or 3 days.
Perhaps Bob was looking at the (Join Date) for these posters and not
the actual posting date.
Roger
Message 7
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| Subject: | Re: Marker Beacon Remote Indicators? |
Good Afternoon Sam,
How many GA airplanes shoot Cat II approaches?
If you do regularly execute CAT II in a GA machine, you have a special
operations permit. I will bet a dollar to a doughnut that if you specified in
your op specs that you intended to use a GPS fix in lieu of the marker
beacon for the Cat II approach, it would be approved. The Fan and Bone markers
are ancient history!
Happy Skies,
Old Was Qualified For Cat II Many Years Ago Bob
Do Not Archive
.
In a message dated 3/25/2014 9:13:42 A.M. Central Daylight Time,
sam.marlow@roadrunner.com writes:
--> AeroElectric-List message posted by: Sam Marlow
<sam.marlow@roadrunner.com>
BobsV35B@aol.com wrote:
> Good Afternoon Bob and Bill,
> May I ask why you want the marker beacon indication? It is/was part
> of the low frequency range system which was shut down over sixty years
> ago. It has been retained for use with a few ILSs and some NDB
> approaches, but such use is rapidly being discontinued.
> I know of no fix designated by a marker beacon that cannot be found
> via some other legal IFR data.
> That is especially true if one has an IFR approved GPS installed.
> There is nothing wrong with having a marker beacon receiver installed,
> but you can eliminate an antenna and some wiring by getting rid of it.
> You might even be able to save some panel space.
> My vote is to forget about the marker Beacon Receiver. <G>
> Happy Skies,
> Old Bob
> *
>
>
> *
We at the airlines still use them on Cat2 approaches..................
Message 8
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| Subject: | Re: Marker Beacon Remote Indicators? |
Good Afternoon Sam,
Just for kicks, I called up the ILS Rwy 9L CAT II & III at KORD. I find
that to execute that approach you must have a GPS, airline or no airline. It
uses many GPS distance fixes for the approach and the distances are from the
ISAJ GPS fix which is colocated with the inner marker. Put ISAJ in lieu of
the inner marker in your op specs and I will bet two bucks against a
doughnut that it will be approved? <G>
Happy Skies,
Old Bob
In a message dated 3/25/2014 9:13:42 A.M. Central Daylight Time,
sam.marlow@roadrunner.com writes:
--> AeroElectric-List message posted by: Sam Marlow
<sam.marlow@roadrunner.com>
BobsV35B@aol.com wrote:
> Good Afternoon Bob and Bill,
> May I ask why you want the marker beacon indication? It is/was part
> of the low frequency range system which was shut down over sixty years
> ago. It has been retained for use with a few ILSs and some NDB
> approaches, but such use is rapidly being discontinued.
> I know of no fix designated by a marker beacon that cannot be found
> via some other legal IFR data.
> That is especially true if one has an IFR approved GPS installed.
> There is nothing wrong with having a marker beacon receiver installed,
> but you can eliminate an antenna and some wiring by getting rid of it.
> You might even be able to save some panel space.
> My vote is to forget about the marker Beacon Receiver. <G>
> Happy Skies,
> Old Bob
> *
>
>
> *
We at the airlines still use them on Cat2 approaches..................
Do Not Archive
Message 9
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| Subject: | Re: Marker Beacon Remote Indicators? |
My airline was not approved to use GPS fixes, and no I don't make cat II app
roaches in my RV. Just my 2 cents worth........
I'm retired now, but only since 2012. You know how slow the FAA is in change
ling things. I'm not trying to start something, just throwing loose change.
Sent from my iPad
> On Mar 25, 2014, at 3:15 PM, BobsV35B@aol.com wrote:
>
> Good Afternoon Sam,
>
> How many GA airplanes shoot Cat II approaches?
>
> If you do regularly execute CAT II in a GA machine, you have a special ope
rations permit. I will bet a dollar to a doughnut that if you specified in y
our op specs that you intended to use a GPS fix in lieu of the marker beacon
for the Cat II approach, it would be approved. The Fan and Bone markers are
ancient history!
>
> Happy Skies,
>
> Old Was Qualified For Cat II Many Years Ago Bob
>
> Do Not Archive
>
> .
> In a message dated 3/25/2014 9:13:42 A.M. Central Daylight Time, sam.marlo
w@roadrunner.com writes:
.com>
>
> BobsV35B@aol.com wrote:
> > Good Afternoon Bob and Bill,
> > May I ask why you want the marker beacon indication? It is/was part
> > of the low frequency range system which was shut down over sixty years
> > ago. It has been retained for use with a few ILSs and some NDB
> > approaches, but such use is rapidly being discontinued.
> > I know of no fix designated by a marker beacon that cannot be found
> > via some other legal IFR data.
> > That is especially true if one has an IFR approved GPS installed.
> > There is nothing wrong with having a marker beacon receiver installed,
> > but you can eliminate an antenna and some wiring by getting rid of it.
> > You might even be able to save some panel space.
> > My vote is to forget about the marker Beacon Receiver. <G>
> > Happy Skies,
> > Old Bob
> > *
> >
> >
> > *
> We at the airlines still use them on Cat2 approaches..................
>
>
>
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
Message 10
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| Subject: | Re: Marker Beacon Remote Indicators? |
Good Evening Sam,
Welcome to the ranks of the unemployed.
What I am trying to do is help folks save money, space and weight on their
airplanes.
Seems any serious IFR pilot will have a GPS and, with a GPS, the marker
beacon becomes superfluous. Just trying to save the troops a few bucks and
some space in their flying machine.
Happy Skies,
Old Bob
In a message dated 3/25/2014 2:57:58 P.M. Central Daylight Time,
sam.marlow@roadrunner.com writes:
My airline was not approved to use GPS fixes, and no I don't make cat II
approaches in my RV. Just my 2 cents worth........
I'm retired now, but only since 2012. You know how slow the FAA is in
changeling things. I'm not trying to start something, just throwing loose
change.
Sent from my iPad
On Mar 25, 2014, at 3:15 PM, _BobsV35B@aol.com_ (mailto:BobsV35B@aol.com)
wrote:
Good Afternoon Sam,
How many GA airplanes shoot Cat II approaches?
If you do regularly execute CAT II in a GA machine, you have a special
operations permit. I will bet a dollar to a doughnut that if you specified in
your op specs that you intended to use a GPS fix in lieu of the marker
beacon for the Cat II approach, it would be approved. The Fan and Bone markers
are ancient history!
Happy Skies,
Old Was Qualified For Cat II Many Years Ago Bob
Do Not Archive
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