Today's Message Index:
----------------------
1. 07:10 AM - St Patrick's Day (RV7ASask)
2. 09:05 AM - Re: Uneven dipole elements (Noel Loveys)
3. 11:30 AM - motorcycle coolant sensor question (Sheldon Olesen)
4. 12:10 PM - Re: motorcycle coolant sensor question (Robert L. Nuckolls, III)
5. 12:21 PM - Re: St Patrick's Day (Robert L. Nuckolls, III)
6. 12:23 PM - Re: Uneven dipole elements (Robert L. Nuckolls, III)
7. 01:00 PM - Re: motorcycle coolant sensor question (rayj)
8. 06:31 PM - Re: motorcycle coolant sensor question (Robert L. Nuckolls, III)
9. 06:34 PM - Re: LED WigWag with B&C SSF-1 (Robert L. Nuckolls, III)
10. 08:13 PM - Re: motorcycle coolant sensor question (rayj)
11. 08:52 PM - Re: LED WigWag with B&C SSF-1 (B Tomm)
Message 1
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| Subject: | St Patrick's Day |
I would like to thank Bob for sharing his knowledge, for his patience, guidance
and the Aeroelectric course I took in North Carolina about four years ago. Also,
thanks to all the other forum contributors from whom I have gleaned so much.
On St Patricks Day, 17 March 2012, in Tisdale, Saskatchewan, with sunny skies,
light wind and 8 degrees C, RV7A, C-FLAM flew for the first time. It was nine
years in construction and worth every moment. The aircraft flew exactly as I hoped
it would. It has an Aero Sport IO-360 with dual Light Speeds and dual alternators.
The electrical architecture is Bobs Z12 and I am very happy with the
final results.
On the panel there is a Dynon Skyview and four Garmins, a GDU370, SL30, GTX327
and GMA340. An iPad 2 is mounted with a Ram mount and has checklists, charts,
POH and more. My grandson says he will be able to play Angry Birds on the long
hauls.
Thanks again to everyone.
Warmest regards
David Lamb
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=369684#369684
Message 2
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| Subject: | Uneven dipole elements |
Bob:
Thanks for explaining the shortened shield on the coax. Sa soon as I saw
your diagram I immediately wondered why only 14".
Noel
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: March 31, 2012 2:06 AM
Subject: RE: AeroElectric-List: Uneven dipole elements
At 06:46 PM 3/30/2012, you wrote:
I'm wondering if it is now operating like a modified Windom antenna (not
straight at centre and different length elements). I also would like to
know if it is vertical or horizontal
This would be a vertically polarized antenna and
appears to be 1/2 wavelength. Is there enough
'bulk' at the coax end to house a small toroid
transformer?
There's another 1/2-wave kid on the block which
is actually a center-fed dipole with the feedline
running up the middle of the lower half of the
dipole. It's marketed as the Air Whip at
http://miracleantenna.com/shop-products/aviation/42
<http://miracleantenna.com/shop-products/aviation/42>
Emacs!
The black box houses the common-mode choke which
de-couples the feed line from the high-voltage
end of the dipole thusly.
http://tinyurl.com/78ph8nz
http://tinyurl.com/6ul4o6f
Waaayyy back when, there was a brief brush with
tiny toroids to match coax feedlines to center fed
dipoles the cores they used were very low
power handling . . . hence good for receive only.
The Antenna Dynamics product has the look and 'smell'
of a similar product. By the way, the reason it's
not 44" (half wave in free space) long is because
the lower 1/4 wave is in coax which is shortened
to about 14" by the coax velocity factor.
Miracle Antenna is a newer kid on the block
and gets very good reviews from their whole
customer base which includes amateur radio and
SWL applications.
Dave, is there any chance you can get the remnants
of the old antenna out? Putting one of these
in it's place would be a prudent move.
If that's not practical/possible, then splicing an
extension on the upper end to replace the cut off
length would be helpful . . . even if it lays off at
right angles to the antenna. This would serve as
an extension moving back toward 1/4 wave for the
upper element and/or 'capacity' hat to load the
shortened antenna thus making it look electrically
like a quarter wave.
Your antenna guy will know all about this and
will be able to help you with the patch.
Bob . . .
Message 3
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| Subject: | motorcycle coolant sensor question |
Can a single coolant temperature sensor be used to send temp data to two different
units, an engine control unit and display unit? My son is building a self
designed racing bike and I have been placed in charge the electrical system.
Sheldon Olesen
N475PV RV-10
Sent from my iPad
Message 4
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| Subject: | Re: motorcycle coolant sensor question |
At 01:25 PM 3/31/2012, you wrote:
><saolesen@sirentel.net>
>
>Can a single coolant temperature sensor be used to send temp data to
>two different units, an engine control unit and display unit? My
>son is building a self designed racing bike and I have been placed
>in charge the electrical system.
It depends. To find the answer you need to know
what the characteristics are for the sensor -AND-
the circuitry that watches it. Legacy temperature
sensors are thermistors . . . a resistor that changes
value in a predictable and repeatable way depending
on surrounding temperature. A newer device is an
integrated circuit which generally offers more user
friendly, linear signals.
How are these two temperature inputs to be used?
Is the 'sensor' already part of the suite of
components for one of the data users . . . and
you have a second user that wants to eavesdrop
on the data?
Sensing temperature in a meaningful way is really
easy. It might be better that each system have its
own sensor tailored to its technology.
Have you crafted a power/data distribution diagram?
Suggest you start with emulating one of the z-figures
and do a pen-to-paper actualization of your design
goals. Then do a similar drawing that speaks to control
and signal lines while identifying the systems and
parts KNOWN to be compatible with their function.
At Beech this was called a system interface document.
It was a drawing of wire bundles PLUS a table of inputs
and outputs from each device along with gains, offsets,
and scale factors for signals expected and offered.
If you had such a set of documents to share, I and
others here on the List can be more specific in our
advice. Bur right now, there's not enough data in
your question to give a reliable answer.
Bob . . .
Message 5
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| Subject: | Re: St Patrick's Day |
At 09:09 AM 3/31/2012, you wrote:
>
>I would like to thank Bob for sharing his
>knowledge, for his patience, guidance and the
>Aeroelectric course I took in North Carolina
>about four years ago. Also, thanks to all the
>other forum contributors from whom I have gleaned so much.
>
>On St Patricks Day, 17 March 2012, in
>Tisdale, Saskatchewan, with sunny skies, light
>wind and 8 degrees C, RV7A, C-FLAM flew for the
>first time. It was nine years in construction
>and worth every moment. The aircraft flew
>exactly as I hoped it would. It has an Aero
>Sport IO-360 with dual Light Speeds and dual
>alternators. The electrical architecture is
>Bobs Z12 and I am very happy with the final results.
>
> On the panel there is a Dynon Skyview and four
> Garmins, a GDU370, SL30, GTX327 and GMA340. An
> iPad 2 is mounted with a Ram mount and has
> checklists, charts, POH and more. My grandson
> says he will be able to play Angry Birds on the long hauls.
That seminar was in Winterville, NC in the spring
of 2007. You've come a long way my friend. How about
a picture of your airplane . . . preferably with yourself
included?
For that matter, it would be interesting to add
a page to aeroelectric.com for pictures of List
Member's airplanes. Email to me directly along with
basic particulars including date of first flight.
Congratulations!
Bob . . .
Message 6
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| Subject: | Re: Uneven dipole elements |
At 01:33 AM 3/31/2012, you wrote:
>We found a diagram of what we think the antenna
>looks like. I'll post of a picture of it next
>week at the latest. It's a slanted-N shape similar to an Archer.
>
>Earlier I described equal-length parallel
>elements. Turns out they're carbon
>reinforcements that aren't part of the
>antenna. I'll show them in the picture when I post it.
How much of the structure/skin around this antenna
is carbon? Buried antennas in carbon aircraft typically
don't do real well. Fiberglas/epoxy is okay but the
carbon is both conductive as well as dissipative . . .
in other words it turns a portion of your signal
into heat.
Bob . . .
Message 7
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| Subject: | Re: motorcycle coolant sensor question |
Greetings Bob,
Could you point to a simple example of the document you recommend? To
provide some idea how others have done it.
do not archive
Thanks,
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 03/31/2012 02:05 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 01:25 PM 3/31/2012, you wrote:
>> <saolesen@sirentel.net>
snip
>
> At Beech this was called a system interface document.
> It was a drawing of wire bundles PLUS a table of inputs
> and outputs from each device along with gains, offsets,
> and scale factors for signals expected and offered.
>
snip
Message 8
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| Subject: | Re: motorcycle coolant sensor question |
At 02:57 PM 3/31/2012, you wrote:
>
>Greetings Bob,
>
>Could you point to a simple example of the document you
>recommend? To provide some idea how others have done it.
>
>do not archive
Sure, check the Z-figures . . . in particular one
that uses a PM alternator. Z-16 is probably good
http://tinyurl.com/7vp9g4e
You wont need an e-bus but if you have electronic
ignition, then you'll need to accommodate that.
The system interface document is simply a schematic
of all the black boxes, sensors and how they connect
to each other. But in particular, you need to KNOW
the nature of the sensor data and whether or not
two different client systems can listen to the
same sensor. That will take some detective work
on your part.
Do you have installation diagrams for the proposed
clients?
Bob . . .
Message 9
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| Subject: | Re: LED WigWag with B&C SSF-1 |
At 06:19 PM 3/30/2012, you wrote:
>
>Bob, can I wire two LED landing and taxi lights per Page 3.0 (Ref DE
>12/15/11) but using a single switch (already installed and labeled
>in unflown RV-6) as shown on Page 3.0 from 2003? Thank you
Give me a few days on this. It occurs to me that
I've been twisting what WAS a good system for
incandescent lamps into a pretzel in search
of the elegant solution for LED lamps.
I'm going to do a clean-piece-of-paper study
of some alternatives to the automotive flasher.
Given the very low current draw and insignificant
inrush for the LED lamps, some sort of all solid
state approach is called for. I think some others
here on the List have mentioned their own
adventures in this arena. Perhaps they'll share.
In any case, there's a cleaner way to go about it
and so the answer is "Yes, we can use the single
switch configuration you've already installed."
Bob . . .
Message 10
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| Subject: | Re: motorcycle coolant sensor question |
A little mix up perhaps. I was just asking for an example of an
interface document for my own information. Sometimes organizing the
info. is half the battle. I like to see how others have solved a
problem. I guess I was expecting something with:"a table of inputs and
outputs from each device along with gains, offsets,
and scale factors for signals expected and offered."
Sorry about the mix up.
do not archive
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 03/31/2012 08:29 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 02:57 PM 3/31/2012, you wrote:
>> <raymondj@frontiernet.net>
>>
>> Greetings Bob,
>>
>> Could you point to a simple example of the document you recommend?
>> To provide some idea how others have done it.
>>
>> do not archive
>
> Sure, check the Z-figures . . . in particular one that uses a PM
> alternator. Z-16 is probably good
>
> http://tinyurl.com/7vp9g4e
>
> You wont need an e-bus but if you have electronic ignition, then
> you'll need to accommodate that.
>
> The system interface document is simply a schematic of all the black
> boxes, sensors and how they connect to each other. But in particular,
> you need to KNOW the nature of the sensor data and whether or not two
> different client systems can listen to the same sensor. That will
> take some detective work on your part.
>
> Do you have installation diagrams for the proposed clients?
>
>
> Bob . . .
>
> http://www.matronics.com/contribution
>
>
Message 11
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| Subject: | LED WigWag with B&C SSF-1 |
I used a ETHFSS-SP with my HID landing lights as other on VAF have
suggested. I can have them both on or flashing mode. Should work with
LED's I would think see...
http://www.bestwarninglights.com/m7/ETHFSS-SP--sound-off-signal-select-a-pat
tern-headlight-flasher-positive-switching.html
$48 so not cheap but solid state and good for up to 55W per side.
Bevan
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Saturday, March 31, 2012 6:33 PM
Subject: Re: AeroElectric-List: LED WigWag with B&C SSF-1
--> <nuckolls.bob@aeroelectric.com>
At 06:19 PM 3/30/2012, you wrote:
>--> <ashuramj@hotmail.com>
>
>Bob, can I wire two LED landing and taxi lights per Page 3.0 (Ref DE
>12/15/11) but using a single switch (already installed and labeled in
>unflown RV-6) as shown on Page 3.0 from 2003? Thank you
Give me a few days on this. It occurs to me that
I've been twisting what WAS a good system for
incandescent lamps into a pretzel in search
of the elegant solution for LED lamps.
I'm going to do a clean-piece-of-paper study
of some alternatives to the automotive flasher.
Given the very low current draw and insignificant
inrush for the LED lamps, some sort of all solid
state approach is called for. I think some others
here on the List have mentioned their own
adventures in this arena. Perhaps they'll share.
In any case, there's a cleaner way to go about it
and so the answer is "Yes, we can use the single
switch configuration you've already installed."
Bob . . .
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