Today's Message Index:
----------------------
1. 06:54 AM - Rotax Rectifier Wiring (Martin Pohl)
2. 08:28 AM - Re: Antenna Polarity?? (Mike)
3. 08:38 AM - Re: Rotax Rectifier Wiring (Gaye and Vaughn)
4. 01:42 PM - Re: tail mounted camera (C Smith)
Message 1
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Subject: | Rotax Rectifier Wiring |
Hello
The Rotax-Installation Manual, engine electric, 17-1, says: "Attention: Do not
interupt circuit between Terminal C and +B of rectifier-regulator during engine
run, as otherwise charging will stop."
What does that mean? Can I switch of the rectifier/regulator i.e. charging process
with interupt of C/+B (similar to switching of the alternator field switch)?
Martin
Zodiac XL
--------
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
www.pohltec.ch/ZodiacXL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=93916#93916
Message 2
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Subject: | Antenna Polarity?? |
Bill,
I have the same setup in my Lancair Legacy and it works perfectly. I
put a ramp test set on it in the aircraft when I first certified and it
past the db and sqitter test. I do remember that the antenna must be
connected correctly. The connections are not interchangeable.
Mike L
Lancair Legacy
Kitfox IV
TS-11 Iskra
A-320
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Bill
Bradburry
Sent: Thursday, February 08, 2007 6:43 AM
Subject: AeroElectric-List: Antenna Polarity??
<bbradburry@allvantage.com>
OK, here is an update...
This plane is a Lancair Legacy, so I got in touch with the Lancair
avionics department. They were able to help me to the point where I was
able to determine which on the two screws should be attached to the
center conductor and which to the shield. So, initial polarization
question/problem solved.
However,...
I noticed in their parts catalog that this antenna is designed (as Bob
remarked) for install in a metal aircraft (Vans RV ??)
However,...
This antenna was glassed in by the Lancair factory when the wing parts
were built, so it was provided by Lancair???? DUH! WHY??
The avionics guy I talked with assured me that the antenna works fine in
the Legacy....
I assume that if I can figure out some way to get the SWR checked on the
antenna and if the SWR is below 2.0, it will work ok??
Thanks for the assistance.
Bill B
Time: 04:28:27 PM PST US
From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
Subject: Re: AeroElectric-List: Antenna Polarity??
At 06:33 PM 2/6/2007 -0500, you wrote:
> ><bbradburry@allvantage.com>
> >
> >Hmmm...I don't think that I made myself clear. This antenna is
glassed in
> >the end of the fiberglas wing. It is not connected to anything.
From the
> >antenna's perspective, it is floating in space. I am attempting to
attach
> >the coax to the antenna. All I have available are the two screws
sticking
> >up to attach the coax. Is there any way that I can determine which
of the
> >two screws should have the center conductor and which should have
the shield?
Hmmmm . . . that antenna was designed to work against
metalic structure of a metal wing for "ground". Is there
even a metal sheet over the tip closeout rib? If there's
no metal used to provide the other "half" of the antenna,
then you're going to realize only a small fraction of
the antenna's already compromised performance by tucking
it under a tip fairing?
How did this particular antenna find its way onto the
airplane? It was originally designed for RVs and could
probably be adapted to other metal wing aircraft with
plastic tip fairings.
Bob . . .
--
2/8/2007
--
2/8/2007
Message 3
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Subject: | Re: Rotax Rectifier Wiring |
Martin,
Based on what I've heard from Europa builders before me, the regulater will
destruct if you disconnect the "C" lead from the "B+" and "R" leads. It
looks to me like drawing Z-16 would do that, although I am dangerously
ignorant when it comes to electronics. I am waiting to speak to the Lockwood
engineers before I proceed with my schematics. If I was you, I would not
proceed until I fully understood the whats and whys of this issue. That is
why I can sign off with.....
Confused enough to consider selling the kit
Vaughn
----- Original Message -----
From: "Martin Pohl" <mpohl@pohltec.ch>
Sent: Friday, February 09, 2007 9:53 AM
Subject: AeroElectric-List: Rotax Rectifier Wiring
>
> Hello
>
> The Rotax-Installation Manual, engine electric, 17-1, says: "Attention: Do
> not interupt circuit between Terminal C and +B of rectifier-regulator
> during engine run, as otherwise charging will stop."
>
> What does that mean? Can I switch of the rectifier/regulator i.e. charging
> process with interupt of C/+B (similar to switching of the alternator
> field switch)?
>
> Martin
> Zodiac XL
>
> --------
> Martin Pohl
> Zodiac XL QBK
> 8645 Jona, Switzerland
> www.pohltec.ch/ZodiacXL
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=93916#93916
>
>
>
Message 4
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Subject: | tail mounted camera |
For those looking at cameras and in plane video recording etc,
http://www.etronics.com/product.asp?stk_code=pyrmv7sc
<http://www.etronics.com/product.asp?stk_code=pyrmv7sc&svbname=683>
&svbname=683
has 9" pull down monitor for $115 and a 7.2" for $70.
They also have a wide selection of various bullet/lipstick cams.
I hope that now one considers this SPAM, I'm trying to help with a posters
question.
I'm not saying they have the lowest prices, You'll have to comparison shop
on your own,
but at first glance these 2 looked like a reasonable deal, and a good
solution for those with
special video airplane projects. It didn't look like they had a PDVR, but
sometimes the categories
things get placed under in retail vendors are a little tricky to figure, so
do your own thorough search.
Craig Smith
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