Today's Message Index:
----------------------
1. 04:57 AM - Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY: HTML title contains no text (William)
2. 05:19 AM - Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY (Harley)
3. 05:35 AM - Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY: HTML title contains no text (William)
4. 05:35 AM - Re: Aircraft Wiring for So-Called Smart People (Eric M. Jones)
5. 06:13 AM - Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY (Paul Pengilly)
6. 06:47 AM - Re: Ameri-King (Harley)
7. 07:28 AM - Re: Ameri-King (BobsV35B@aol.com)
8. 07:47 AM - RG 142 Stripper (dsvs@comcast.net)
9. 08:04 AM - Re: Grounding in the Fuel Level System (Werner Schneider)
10. 08:08 AM - Re: Ameri-King (Harley)
11. 08:45 AM - Antennas in wood and plastic airplanes (Brian Lloyd)
12. 09:12 AM - Ameri-King ELT antenna mounting (Harley)
13. 09:31 AM - Re: Re: Aircraft Wiring for So-Called Smart People (Paul Messinger)
14. 11:13 AM - Re: RG 142 Stripper (dsvs@comcast.net)
15. 11:48 AM - Loadmeter connection question (PeterHunt1@aol.com)
16. 12:05 PM - COM antenna in a gear leg fairing? (PhilWhite9@aol.com)
17. 02:16 PM - Re: Loadmeter connection question (Robert L. Nuckolls, III)
18. 02:54 PM - Re: RG 142 Stripper (Robert L. Nuckolls, III)
19. 03:39 PM - Eye of newt, tail of frog and have you tried a cat's whisker? (Robert L. Nuckolls, III)
20. 04:53 PM - Re: Garmin GPS LCD? (John Tvedte)
21. 07:36 PM - Slobovia Outernational Flyin Invitation (Charlie England)
22. 09:23 PM - yellow and blue wires? (Bobby Hester)
23. 11:27 PM - Re: yellow and blue wires? (Franz Fux)
Message 1
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| Subject: | Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY: |
HTML title contains no text
--> AeroElectric-List message posted by: "William" <wschertz@ispwest.com>
My antenna is mounted at the center of the 'star', on the aluminum bracket.
the ground plane is on the fuselage floor, curving with the curvature of the
fuse. Could you put the ground plane on the roof, antenna facing down?
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From: "Harley" <harley@AgelessWings.com>
HTML.title.contains.no.text@matronics.com>
Subject: Re: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY:
HTML title contains no text
> --> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
>
> Thanks Bill...that looks like a real possibility....but. from the
> picture, it's hard to tell where you have the antenna mounted. I can't
> think of anywhere with that much room on top of my plane...which I would
> think is where you'd want it.
>
> Harley
>
> Bill Schertz wrote:
>
> >--> AeroElectric-List message posted by: "Bill Schertz"
<Wschertz@ispwest.com>
> >
> >you can use 6 strips of copper foil 18" long on the composite surface
looking like * with the antenna in the center. I have a picture that I will
send you later tonight.
> >Bill Schertz
> >KIS Cruiser # 4045
> >----- Original Message -----
> >From: Harley [mailto:harley@AgelessWings.com]
> >To: aeroelectric-list@matronics.com
> >Subject: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY
BODY: HTML title contains no text
> >
> >
> >
> >>--> AeroElectric-List message posted by: Harley
<harley@agelesswings.com>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >>Good morning fellow electron chasers...
> >>
> >>
> >
> >
> >
> >
> >
> >
> >>Well, time to stop lurking and ask a question (which has probably been
> >>
> >>
> >
> >
> >
> >>answered before, but I didn't pay attention then as I didn't know I'd
> >>
> >>
> >
> >
> >
> >>need it!)
> >>
> >>
> >
> >
> >
> >
> >
> >
> >>I just received my Ameri-King AK 450 ELT. The instructions for mounting
> >>
> >>
> >
> >
> >
> >>and locating it seem pretty straight forward, but I do have a couple of
> >>
> >>
> >
> >
> >
> >>questions.
> >>
> >>
> >
> >
> >
> >
> >
> >
> >>I have a Long EZ...nearing completion. I have a couple ideas of where I
> >>
> >>
> >
> >
> >
> >>can mount the ELT. To save some trial and error, where have others
> >>
> >>
> >
> >
> >
> >>mounted them?
> >>
> >>
> >
> >
> >
> >
> >
> >
> >>Also, I am sure that this has been discussed before, but the
> >>
> >>
> >
> >
> >
> >>instructions for mounting the antenna call for a 36 inch diameter ground
> >>
> >>
> >
> >
> >
> >>plane! Where can I ever mount a piece of aluminum that big in a Long
> >>
> >>
> >
> >
> >
> >>Ez? The darn thing will look like an AWACS! Or is their another way
> >>
> >>
> >
> >
> >
> >>that works?
> >>
> >>
> >
> >
> >
> >
> >
> >
> >>Harley Dixon
> >>
> >>
> >
> >
> >
> >>Long EZ N28EZ
> >>
> >>
> >
> >
> >
> >>www.agelesswings.com
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
Message 2
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BODY": HTML.title.contains.no.text@matronics.com
| Subject: | Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY |
BODY: HTML title contains no text
--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
Morning, Bill...
Thanks for sticking with me on this....
>>My antenna is mounted at the center of the 'star', on the aluminum
bracket....
the ground plane is on the fuselage floor<<
That's what I thought from the picture, but doesn't that put the antenna
inside the fuselage?
>>Could you put the ground plane on the roof, antenna facing down?<<
There is no "roof" in a Long... just the canopy and a small foam and
glass section over the rear passengers head...about a foot long (fore
and aft) and the width of the canopy. I might be able to mount something
like that in the cowling...but if the engine departs the plane, or even
just the cowl, then no signal! Also, with the antenna pointing down,
like under the plane, or down from the top, wouldn't that be a bad place
for it (unless I can rig the plane to always flip over in an emergency! <G>)
Someone else mentioned a dipole, or a even a folded dipole, which would
fit inside the spar behind the passenger's head, but I would think that
that would be too directional.
Don't even have enough room on the strake without getting into the gas
tank. The floor/fuselage side looks like the only place that is wide
and long enough, but can the antenna be placed remotely from the ground
plane, say on the turtledeck, or does that defeat the purpose of the
ground plane? Does it have to be close to the antenna?
Where have other Long or Vari Ez drivers put their ELT antennas and how
have they solved the ground plane problem?
Harley
Long EZ N28EZ
William wrote:
>--> AeroElectric-List message posted by: "William" <wschertz@ispwest.com>
>
>My antenna is mounted at the center of the 'star', on the aluminum bracket.
>
>the ground plane is on the fuselage floor, curving with the curvature of the
>fuse. Could you put the ground plane on the roof, antenna facing down?
>Bill Schertz
>KIS Cruiser # 4045
>----- Original Message -----
>From: "Harley" <harley@AgelessWings.com>
>To: <aeroelectric-list@matronics.com BODY :
>HTML.title.contains.no.text@matronics.com>
>Subject: Re: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY:
>HTML title contains no text
>
>
>
>
>>--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
>>
>>Thanks Bill...that looks like a real possibility....but. from the
>>picture, it's hard to tell where you have the antenna mounted. I can't
>>think of anywhere with that much room on top of my plane...which I would
>>think is where you'd want it.
>>
>>Harley
>>
>>Bill Schertz wrote:
>>
>>
>>
>>>--> AeroElectric-List message posted by: "Bill Schertz"
>>>
>>>
><Wschertz@ispwest.com>
>
>
>>>you can use 6 strips of copper foil 18" long on the composite surface
>>>
>>>
>looking like * with the antenna in the center. I have a picture that I will
>send you later tonight.
>
>
>>>Bill Schertz
>>>KIS Cruiser # 4045
>>>----- Original Message -----
>>>From: Harley [mailto:harley@AgelessWings.com]
>>>To: aeroelectric-list@matronics.com
>>>Subject: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY
>>>
>>>
>BODY: HTML title contains no text
>
>
>>>
>>>
>>>
>>>>--> AeroElectric-List message posted by: Harley
>>>>
>>>>
><harley@agelesswings.com>
>
>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>Good morning fellow electron chasers...
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>Well, time to stop lurking and ask a question (which has probably been
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>answered before, but I didn't pay attention then as I didn't know I'd
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>need it!)
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>I just received my Ameri-King AK 450 ELT. The instructions for mounting
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>and locating it seem pretty straight forward, but I do have a couple of
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>questions.
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>I have a Long EZ...nearing completion. I have a couple ideas of where I
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>can mount the ELT. To save some trial and error, where have others
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>mounted them?
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>Also, I am sure that this has been discussed before, but the
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>instructions for mounting the antenna call for a 36 inch diameter ground
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>plane! Where can I ever mount a piece of aluminum that big in a Long
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>Ez? The darn thing will look like an AWACS! Or is their another way
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>that works?
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>Harley Dixon
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>Long EZ N28EZ
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>www.agelesswings.com
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>
>
Message 3
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| Subject: | Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY: |
HTML title contains no text
--> AeroElectric-List message posted by: "William" <wschertz@ispwest.com>
Yes my ELT antenna is inside the fuselage, i have a composite plane.
the antenna basically needs to be centered in the 'ground plane', from what
I understand.
A builder (E-racer) at my airport has the ground plane as a foil coating on
the inside of the fuse right behind the passenger seat, and then the ELT
antenna running up the back of the seat. Don't know how effective that is.
Jim Weir designed a 'dipole' version once, and in response to the question
of orientation, asked how you know what direction will be 'up' when you have
finished crashing.
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From: "Harley" <harley@AgelessWings.com>
HTML.title.contains.no.text@matronics.com>
Subject: Re: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY:
HTML title contains no text
> --> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
>
> Morning, Bill...
>
> Thanks for sticking with me on this....
>
> >>My antenna is mounted at the center of the 'star', on the aluminum
> bracket....
> the ground plane is on the fuselage floor<<
>
> That's what I thought from the picture, but doesn't that put the antenna
> inside the fuselage?
>
> >>Could you put the ground plane on the roof, antenna facing down?<<
>
> There is no "roof" in a Long... just the canopy and a small foam and
> glass section over the rear passengers head...about a foot long (fore
> and aft) and the width of the canopy. I might be able to mount something
> like that in the cowling...but if the engine departs the plane, or even
> just the cowl, then no signal! Also, with the antenna pointing down,
> like under the plane, or down from the top, wouldn't that be a bad place
> for it (unless I can rig the plane to always flip over in an emergency!
<G>)
>
> Someone else mentioned a dipole, or a even a folded dipole, which would
> fit inside the spar behind the passenger's head, but I would think that
> that would be too directional.
>
> Don't even have enough room on the strake without getting into the gas
> tank. The floor/fuselage side looks like the only place that is wide
> and long enough, but can the antenna be placed remotely from the ground
> plane, say on the turtledeck, or does that defeat the purpose of the
> ground plane? Does it have to be close to the antenna?
>
> Where have other Long or Vari Ez drivers put their ELT antennas and how
> have they solved the ground plane problem?
>
> Harley
> Long EZ N28EZ
>
>
> William wrote:
>
> >--> AeroElectric-List message posted by: "William" <wschertz@ispwest.com>
> >
> >My antenna is mounted at the center of the 'star', on the aluminum
bracket.
> >
> >the ground plane is on the fuselage floor, curving with the curvature of
the
> >fuse. Could you put the ground plane on the roof, antenna facing down?
> >Bill Schertz
> >KIS Cruiser # 4045
> >----- Original Message -----
> >From: "Harley" <harley@AgelessWings.com>
> >To: <aeroelectric-list@matronics.com BODY :
> >HTML.title.contains.no.text@matronics.com>
> >Subject: Re: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY:
> >HTML title contains no text
> >
> >
> >
> >
> >>--> AeroElectric-List message posted by: Harley
<harley@agelesswings.com>
> >>
> >>Thanks Bill...that looks like a real possibility....but. from the
> >>picture, it's hard to tell where you have the antenna mounted. I can't
> >>think of anywhere with that much room on top of my plane...which I would
> >>think is where you'd want it.
> >>
> >>Harley
> >>
> >>Bill Schertz wrote:
> >>
> >>
> >>
> >>>--> AeroElectric-List message posted by: "Bill Schertz"
> >>>
> >>>
> ><Wschertz@ispwest.com>
> >
> >
> >>>you can use 6 strips of copper foil 18" long on the composite surface
> >>>
> >>>
> >looking like * with the antenna in the center. I have a picture that I
will
> >send you later tonight.
> >
> >
> >>>Bill Schertz
> >>>KIS Cruiser # 4045
> >>>----- Original Message -----
> >>>From: Harley [mailto:harley@AgelessWings.com]
> >>>To: aeroelectric-list@matronics.com
> >>>Subject: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY
> >>>
> >>>
> >BODY: HTML title contains no text
> >
> >
> >>>
> >>>
> >>>
> >>>>--> AeroElectric-List message posted by: Harley
> >>>>
> >>>>
> ><harley@agelesswings.com>
> >
> >
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Good morning fellow electron chasers...
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Well, time to stop lurking and ask a question (which has probably been
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>answered before, but I didn't pay attention then as I didn't know I'd
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>need it!)
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>I just received my Ameri-King AK 450 ELT. The instructions for
mounting
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>and locating it seem pretty straight forward, but I do have a couple
of
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>questions.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>I have a Long EZ...nearing completion. I have a couple ideas of where
I
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>can mount the ELT. To save some trial and error, where have others
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>mounted them?
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Also, I am sure that this has been discussed before, but the
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>instructions for mounting the antenna call for a 36 inch diameter
ground
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>plane! Where can I ever mount a piece of aluminum that big in a Long
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>Ez? The darn thing will look like an AWACS! Or is their another way
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>that works?
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Harley Dixon
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>Long EZ N28EZ
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>>www.agelesswings.com
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >
> >
> >
> >
>
>
Message 4
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|
| Subject: | RE: Aircraft Wiring for So-Called Smart People |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
I agree with Bob N. And is the "Bare-Knuckles " thing a poke at the champ?
Teflon---I was a design engineer in medical devices for decades and remember
the time when Teflon came and went. Teflon seemed to be a miracle at the
time...but as time went on almost every single thing we made of "Miracle
Teflon" evolved into some other material that was cheaper and performed far
better.
We transitioned from an attitude of "...Let's use Teflon!" to "...use Teflon
only if you are absolutely certain it is critical to the design." (And it
almost never is.) Even as pipe-thread sealant, Teflon needs some
reconsideration.
(As I vaguely recall...) One NTSB examiner commented on an aviation accident
blamed partly on Teflon failure in a DC10(?)--"Teflon has no place in
aircraft design." This was an epiphany for me.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Teamwork: " A lot of people doing exactly what I say."
(Marketing exec., Citrix Corp.)
Message 5
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|
BODY": HTML.title.contains.no.text@matronics.com
| Subject: | Re: Ameri-King ELT0.12 HTML_TITLE_EMPTY |
BODY: HTML title contains no text
--> AeroElectric-List message posted by: Paul Pengilly <pengilly@southwest.com.au>
My answer is buy a portable that fits in your top pocket then if you
have to ditch in water you still have
a beacon.also it can be used in the car in the desert if you become
stranded i.e.: bogged broken down etc.
Regards
Paul
Harley wrote:
>--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
>
>Morning, Bill...
>
>Thanks for sticking with me on this....
>
> >>My antenna is mounted at the center of the 'star', on the aluminum
>bracket....
>the ground plane is on the fuselage floor<<
>
>That's what I thought from the picture, but doesn't that put the antenna
>inside the fuselage?
>
> >>Could you put the ground plane on the roof, antenna facing down?<<
>
>There is no "roof" in a Long... just the canopy and a small foam and
>glass section over the rear passengers head...about a foot long (fore
>and aft) and the width of the canopy. I might be able to mount something
>like that in the cowling...but if the engine departs the plane, or even
>just the cowl, then no signal! Also, with the antenna pointing down,
>like under the plane, or down from the top, wouldn't that be a bad place
>for it (unless I can rig the plane to always flip over in an emergency! <G>)
>
>Someone else mentioned a dipole, or a even a folded dipole, which would
>fit inside the spar behind the passenger's head, but I would think that
>that would be too directional.
>
>Don't even have enough room on the strake without getting into the gas
>tank. The floor/fuselage side looks like the only place that is wide
>and long enough, but can the antenna be placed remotely from the ground
>plane, say on the turtledeck, or does that defeat the purpose of the
>ground plane? Does it have to be close to the antenna?
>
>Where have other Long or Vari Ez drivers put their ELT antennas and how
>have they solved the ground plane problem?
>
>Harley
>Long EZ N28EZ
>
>
>William wrote:
>
>
>
>>--> AeroElectric-List message posted by: "William" <wschertz@ispwest.com>
>>
>>My antenna is mounted at the center of the 'star', on the aluminum bracket.
>>
>>the ground plane is on the fuselage floor, curving with the curvature of the
>>fuse. Could you put the ground plane on the roof, antenna facing down?
>>Bill Schertz
>>KIS Cruiser # 4045
>>----- Original Message -----
>>From: "Harley" <harley@AgelessWings.com>
>>To: <aeroelectric-list@matronics.com BODY :
>>HTML.title.contains.no.text@matronics.com>
>>Subject: Re: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY BODY:
>>HTML title contains no text
>>
>>
>>
>>
>>
>>
>>>--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
>>>
>>>Thanks Bill...that looks like a real possibility....but. from the
>>>picture, it's hard to tell where you have the antenna mounted. I can't
>>>think of anywhere with that much room on top of my plane...which I would
>>>think is where you'd want it.
>>>
>>>Harley
>>>
>>>Bill Schertz wrote:
>>>
>>>
>>>
>>>
>>>
>>>>--> AeroElectric-List message posted by: "Bill Schertz"
>>>>
>>>>
>>>>
>>>>
>><Wschertz@ispwest.com>
>>
>>
>>
>>
>>>>you can use 6 strips of copper foil 18" long on the composite surface
>>>>
>>>>
>>>>
>>>>
>>looking like * with the antenna in the center. I have a picture that I will
>>send you later tonight.
>>
>>
>>
>>
>>>>Bill Schertz
>>>>KIS Cruiser # 4045
>>>>----- Original Message -----
>>>>From: Harley [mailto:harley@AgelessWings.com]
>>>>To: aeroelectric-list@matronics.com
>>>>Subject: AeroElectric-List: Ameri-King ELT0.12 HTML_TITLE_EMPTY
>>>>
>>>>
>>>>
>>>>
>>BODY: HTML title contains no text
>>
>>
>>
>>
>>>>
>>>>
>>>>
>>>>
>>>>>--> AeroElectric-List message posted by: Harley
>>>>>
>>>>>
>>>>>
>>>>>
>><harley@agelesswings.com>
>>
>>
>>
>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Good morning fellow electron chasers...
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Well, time to stop lurking and ask a question (which has probably been
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>answered before, but I didn't pay attention then as I didn't know I'd
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>need it!)
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>I just received my Ameri-King AK 450 ELT. The instructions for mounting
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>and locating it seem pretty straight forward, but I do have a couple of
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>questions.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>I have a Long EZ...nearing completion. I have a couple ideas of where I
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>can mount the ELT. To save some trial and error, where have others
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>mounted them?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Also, I am sure that this has been discussed before, but the
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>instructions for mounting the antenna call for a 36 inch diameter ground
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>plane! Where can I ever mount a piece of aluminum that big in a Long
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Ez? The darn thing will look like an AWACS! Or is their another way
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>that works?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Harley Dixon
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Long EZ N28EZ
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>www.agelesswings.com
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
Message 6
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--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
Morning, Paul...
(First, I deleted some of the older messages...this was getting a bit
too long! <G>)
Thanks for the advice...actually, this Ameri-King unit is portable...it
uses Duracell D-cells for the power, and comes with an additional
telescoping antenna, and a clip type mount for easy removal and use "off
vehicle". It also has a microphone input so you can talk to rescue people.
It's a bit heavy and large to stick in a pocket though, but for a back
pack or road vehicle, it would also be a good choice.
Portability and manual activation is all well-and-good, but, in the
event that it has to be activated automatically on impact, and the
pilot/passengers are not conscious, this would most likely not be an
option and would depend on the installed antenna. In Ameri King's
manual, they specifically forbid trying to use it in the automatic mode
with the portable antenna installed.
Harley
Paul Pengilly wrote:
>--> AeroElectric-List message posted by: Paul Pengilly <pengilly@southwest.com.au>
>
>My answer is buy a portable that fits in your top pocket then if you
>have to ditch in water you still have
>a beacon.also it can be used in the car in the desert if you become
>stranded i.e.: bogged broken down etc.
>Regards
>Paul
>
>Harley wrote:
>
>
>
>>--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
>>
>>Morning, Bill...
>>
>>Thanks for sticking with me on this....
>>
>>
>>
>>>>My antenna is mounted at the center of the 'star', on the aluminum
>>>>
>>>>
>>bracket....
>>the ground plane is on the fuselage floor<<
>>
>>That's what I thought from the picture, but doesn't that put the antenna
>>inside the fuselage?
>>
>>
>>
>>>>Could you put the ground plane on the roof, antenna facing down?<<
>>>>
>>>>
>>There is no "roof" in a Long... just the canopy and a small foam and
>>glass section over the rear passengers head...about a foot long (fore
>>and aft) and the width of the canopy. I might be able to mount something
>>like that in the cowling...but if the engine departs the plane, or even
>>just the cowl, then no signal! Also, with the antenna pointing down,
>>like under the plane, or down from the top, wouldn't that be a bad place
>>for it (unless I can rig the plane to always flip over in an emergency! <G>)
>>
>>Someone else mentioned a dipole, or a even a folded dipole, which would
>>fit inside the spar behind the passenger's head, but I would think that
>>that would be too directional.
>>
>>Don't even have enough room on the strake without getting into the gas
>>tank. The floor/fuselage side looks like the only place that is wide
>>and long enough, but can the antenna be placed remotely from the ground
>>plane, say on the turtledeck, or does that defeat the purpose of the
>>ground plane? Does it have to be close to the antenna?
>>
>>Where have other Long or Vari Ez drivers put their ELT antennas and how
>>have they solved the ground plane problem?
>>
>>Harley
>>Long EZ N28EZ
>>
>>
>
>
Message 7
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--> AeroElectric-List message posted by: BobsV35B@aol.com
In a message dated 9/17/04 8:48:43 AM Central Daylight Time,
harley@AgelessWings.com writes:
(First, I deleted some of the older messages...this was getting a bit
too long! <G>)
Good Choice!
However, I have been waiting for one of the antenna experts to comment on
the use of a ground plane.
Please feel free to correct me thoroughly, but my understanding is that a
ground plane allows us aviators to use a shorter antenna. That is generally
considered good. A ground plane can consist of four to six radial strips of
wire, foil, or any other conductive material. It is best if they are
perpendicular to the antenna, but angles away from the antenna will work quite
well.
If the angle between the antenna and the ground plane is acute, they don't
work very well.
If you but the ground plane wires, or strips, on a curved belly or curved
top of a fuselage, they will work very well if the antenna is outside the
fuselage. If you put the antenna inside the airplane, that makes the angle from
the ground plane acute and it won't work very well.
Now, having said all that, most antennas work reasonably well even if all of
the "rules" are disregarded. One of the most popular speed kits for a
common certificated airplane uses a communication antenna mounted horizontally
in
the tail cone with a very much "too small" a ground plane. Shouldn't work at
all according to common knowledge. My friends who use that speed kit's
antenna mount tell me it works just fine!
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Message 8
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|
0.70 RCVD_BY_IP Received by mail server with no name
0.50 MIME_BOUND_NEXTPART Spam tool pattern in MIME boundary
0.01 RCVD_DOUBLE_IP_LOOSE Received: by and from look like IP addresses
--> AeroElectric-List message posted by: dsvs@comcast.net
Bob and others,
Does anyone have information on the type of stripper to use on RG142. I find many
strippers for rg59 and rg6 but none for RG142. . Bob I think you had a stripper
at your Long Beach class, if that is usable on RG142 could you let me know
where to get one? Thanks in advance. Don
Bob and others,
Does anyone have information on the type of stripper to use on RG142. I find many
strippers for rg59 and rg6 but none for RG142.. Bob I think you had a stripper
at your Long Beach class, if that is usable on RG142 could you let me know
where to get one? Thanks in advance. Don
Message 9
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|
| Subject: | Re: Grounding in the Fuel Level System |
--> AeroElectric-List message posted by: "Werner Schneider" <wernerschneider@compuserve.com>
----- Original Message -----
From: "Mickey Coggins" <mick-matronics@rv8.ch>
Subject: Re: AeroElectric-List: Grounding in the Fuel Level System
> --> AeroElectric-List message posted by: Mickey Coggins
<mick-matronics@rv8.ch>
>
> Hi,
>
> I have the SW fuel senders as well, shown here in this photo:
>
> http://www.rv8.ch/images/articles/20040726220023545_5_original.JPG
>
> Can you tell me the best way to ground it?
>
> I'm guessing one way is to drill a small hole, thread it, and
> screw on a faston or just screw on a ring terminal. Does
> this sound right? Of course, I don't want to go through
> the plate, since it's already prosealed on, and I'd like to
> avoid removing it again. I feel kind of silly that I didn't
> think of this before I sealed up my tanks.
>
> Thanks for any hints.
>
> Mickey
>
>
> >> How does the sensor find a ground path through all the sealant and
> >> gaskets used to prevent fuel leakage?
> >
> > The difficult thing is to maintain insulation in most
> > cases. There are many a failure mode for electronic
> > devices where some tiny conductor has compromised the
> > insulation between two parts that are not supposed to
> > be connected. If you have threaded fasteners or rivets
> > holding two parts together, it's a rare instance that
> > clamp up forces won't extrude any insulating materials
> > out of the joint.
> >
> > In a nutshell, the best thought out fuel gaging systems
> > will be completely isolated from and have no dependence on
> > chassis or airframe ground for operation.
> >
> > Bob . . .
>
>
> --
> Mickey Coggins
> http://www.rv8.ch/
> #82007 QB Wings/Fuselage
>
>
Message 10
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--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
Thanks, Bob...
I kinda suspected that, which is why I was asking...I want to avoid
trials though, if I can get info directly from a present Long EZ user,
It would probably save me a bit of work.
I just asked over on the canard-aviator's list as well, so we'll see
what they have done.
Harley
BobsV35B@aol.com wrote:
>--> AeroElectric-List message posted by: BobsV35B@aol.com
>
>
>In a message dated 9/17/04 8:48:43 AM Central Daylight Time,
>harley@AgelessWings.com writes:
>
>
>(First, I deleted some of the older messages...this was getting a bit
>too long! <G>)
>
>
>Good Choice!
>
>However, I have been waiting for one of the antenna experts to comment on
>the use of a ground plane.
>
>Please feel free to correct me thoroughly, but my understanding is that a
>ground plane allows us aviators to use a shorter antenna. That is generally
>considered good. A ground plane can consist of four to six radial strips of
>wire, foil, or any other conductive material. It is best if they are
>perpendicular to the antenna, but angles away from the antenna will work quite
well.
>If the angle between the antenna and the ground plane is acute, they don't
>work very well.
>
>If you but the ground plane wires, or strips, on a curved belly or curved
>top of a fuselage, they will work very well if the antenna is outside the
>fuselage. If you put the antenna inside the airplane, that makes the angle from
>the ground plane acute and it won't work very well.
>
>Now, having said all that, most antennas work reasonably well even if all of
>the "rules" are disregarded. One of the most popular speed kits for a
>common certificated airplane uses a communication antenna mounted horizontally
in
>the tail cone with a very much "too small" a ground plane. Shouldn't work at
>all according to common knowledge. My friends who use that speed kit's
>antenna mount tell me it works just fine!
>
>Happy Skies,
>
>Old Bob
>AKA
>Bob Siegfried
>Ancient Aviator
>Stearman N3977A
>Brookeridge Airpark LL22
>Downers Grove, IL 60516
>630 985-8502
>
>
>
>
Message 11
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|
| Subject: | Antennas in wood and plastic airplanes |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
Besides here I have had numerous people asking me about good antennas
for their plastic airplanes. Most have been trying to fabricate a
ground plane for a standard aircraft antenna. I would like to point
out that this is not necessary if you change your thinking a bit and go
with something a little different.
For a vertically-polarized omnidirectional antenna for comm use I would
consider something called a coaxial dipole. It has the advantage of
being compact and very inexpensive to build. Basically it is a
1/2-wave dipole fed at the center with coax that passes through one of
the cylindrical radiators. You can build it entirely out of the coax
used to feed it!
1. Cut and remove the braid from a piece of coax so that the center
conductor with its insulation is about 24" long.
2. Remove the outer insulation from the braid leaving just the copper
braid itself.
3. Push this braid down over the remaining outer insulation so that
the coax is running up through the braid with the insulated center
conductor sticking out.
4. Solder the braid you have just installed over the outside to the
braid of the coax.
5. Trim both the outer braid and the center conductor to 22".
The total length of this antenna is 44". It can be easily built into
the vertical stabilizer.
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
+1.340.998.9447 St. Thomas, VI 00802
Message 12
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| Subject: | Ameri-King ELT antenna mounting |
0.12 HTML_TITLE_EMPTY BODY: HTML title contains no text
--> AeroElectric-List message posted by: Harley <harley@agelesswings.com>
Everyone...
As usual I was a bit premature with my request for info on mounting an ELT
antenna. Continued searching since I posted that question has found
some good information regarding ELT antennas in our planes.
Specifically in the archives on the Cozy website.
http://www.cozybuilders.org/mail_list/topics96/antennae.txt
Searching the above linked page for ELT, I think I found all I
need...but just to be sure, anyone have any comments on the information
there that may have changed, been disproved or updated?
Harley Dixon
Long EZ N28EZ
www.agelesswings.com
Message 13
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|
| Subject: | Re: RE: Aircraft Wiring for So-Called Smart People |
--> AeroElectric-List message posted by: "Paul Messinger" <paulm@olypen.com>
In the late 60's and 70's I was directly envolved with long life spacecraft
electrical/electronics design. Teflon insulated wire was tried and we found
that cold flow caused shorted wire to wire in wire bundles after 6 months at
room temp (long before flight). It was hard to find and occurred at the
connector where there was a 90 deg boot. Tested spacecraft and put in
storage until needed for launch and found it failed test and the above was
the reason. Huge flap resulted and $$$$ in rework.
I was assigned to a different program a couple of years later and because of
security compartmenting they had the same problem and had not heard of the
other programs problems.
There is also Teflon insulated coax and again there has been cold flow
(shorts) even when the minimum bend radius was observed.
We used lots of kapton insulation and that worked well but in a spacecraft
as there is no long term vibration as in an aircraft where its very bad
news. There have been electrical fires on commercial aircraft with Kapton.
Both are in my opinion a NO NO for our use.
Paul
----- Original Message -----
From: "Eric M. Jones" <emjones@charter.net>
Subject: AeroElectric-List: RE: Aircraft Wiring for So-Called Smart People
> --> AeroElectric-List message posted by: "Eric M. Jones"
<emjones@charter.net>
>
> I agree with Bob N. And is the "Bare-Knuckles " thing a poke at the champ?
>
> Teflon---I was a design engineer in medical devices for decades and
remember
> the time when Teflon came and went. Teflon seemed to be a miracle at the
> time...but as time went on almost every single thing we made of "Miracle
> Teflon" evolved into some other material that was cheaper and performed
far
> better.
>
> We transitioned from an attitude of "...Let's use Teflon!" to "...use
Teflon
> only if you are absolutely certain it is critical to the design." (And it
> almost never is.) Even as pipe-thread sealant, Teflon needs some
> reconsideration.
>
> (As I vaguely recall...) One NTSB examiner commented on an aviation
accident
> blamed partly on Teflon failure in a DC10(?)--"Teflon has no place in
> aircraft design." This was an epiphany for me.
>
>
> Regards,
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge MA 01550-2705
> Phone (508) 764-2072
> Email: emjones@charter.net
>
> Teamwork: " A lot of people doing exactly what I say."
> (Marketing exec., Citrix Corp.)
>
Message 14
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|
| Subject: | Re: RG 142 Stripper |
--> AeroElectric-List message posted by: dsvs@comcast.net
Actually I need a stripper for RG 400. if you know where to get one. Thanks
-------------- Original message --------------
> --> AeroElectric-List message posted by: dsvs@comcast.net
>
> Bob and others,
> Does anyone have information on the type of stripper to use on RG142. I find
> many strippers for rg59 and rg6 but none for RG142. . Bob I think you had a
> stripper at your Long Beach class, if that is usable on RG142 could you let me
> know where to get one? Thanks in advance. Don
>
>
>
>
>
>
>
Actually I need a stripper for RG 400. if you know where to get one. Thanks
-------------- Original message --------------
-- AeroElectric-List message posted by: dsvs@comcast.net
Bob and others,
Does anyone have information on the type of stripper to use on RG142. I find
many strippers for rg59 and rg6 but none for RG142. . Bob I think you had a
stripper at your Long Beach class, if that is usable on RG142 could you let me
know where to get one? Thanks in advance. Don
ww.matronics.com/chat
/contribution
Message 15
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|
| Subject: | Loadmeter connection question |
--> AeroElectric-List message posted by: PeterHunt1@aol.com
Bob/Others
I have the single battery, dual alternator (60A and 20A) arrangement
described in Bob's Figure Z-12. The diagram shows two shunts for two loadmeters,
but
the "+" and "-" wires to the loadmeters are not the same. On the 60 amp
alternator the "+" wire to the loadmeter is on the alternator "B" lead side of
the
shunt. On the 20 amp alternator the "-" wire to the loadmeter is on the "B"
lead side of the shunt. Shouldn't both loadmeters be wired to their respective
shunts in the same manner? Is figure Z-12 correct, or should the "+" and "-"
designations of one of the loadmeter wires be reversed?
Pete
Clearwater, FL
RV-6, struggling to finish wiring
Message 16
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|
| Subject: | COM antenna in a gear leg fairing? |
--> AeroElectric-List message posted by: PhilWhite9@aol.com
I understand a COM antenna should have vertical polarization, but RV's only
offer horizontal wingtips for internal mounted antennae.
Can one install an Archer antenna strip inside the gear leg fairing on the
front edge of the fiberglass, and acheive good radio performance? Or is it
too close to the grounded gear leg to function properly?
Phil White, RV-10 #40220
Message 17
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|
| Subject: | Re: Loadmeter connection question |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
At 02:47 PM 9/17/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: PeterHunt1@aol.com
>
>Bob/Others
>
>I have the single battery, dual alternator (60A and 20A) arrangement
>described in Bob's Figure Z-12. The diagram shows two shunts for two
>loadmeters, but
>the "+" and "-" wires to the loadmeters are not the same. On the 60 amp
>alternator the "+" wire to the loadmeter is on the alternator "B" lead
>side of the
>shunt. On the 20 amp alternator the "-" wire to the loadmeter is on the "B"
>lead side of the shunt. Shouldn't both loadmeters be wired to their
>respective
>shunts in the same manner? Is figure Z-12 correct, or should the "+" and "-"
>designations of one of the loadmeter wires be reversed?
Yes, the leads for the Aux Alternator are reversed in Z-12
and have been fixed for Rev 11.
Bob . . .
---
Message 18
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|
| Subject: | Re: RG 142 Stripper |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
I have several strippers for coax. They feature three blades mounted in handle
and set to a depth appropriate to exactly cutting outer jacket, outer jacket
plus shield, and outer jacket, shield and inner insulation. One such stripper
is "close" and I've learned how to finesse its usage for an okay result.
I did a little 'net searching and ordered this tool off Ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5721067314
It's advertised as for RG-59 and RG-6. The attractive feature is that
the blades are adjustable via allen wrench. As soon as it gets here,
I'll see if it will set up for RG-400/142 and let you all know. The
price is certainly right ($15.00 including shipping). Watch this
space.
Bob . . .
At 06:12 PM 9/17/2004 +0000, you wrote:
>--> AeroElectric-List message posted by: dsvs@comcast.net
>
>Actually I need a stripper for RG 400. if you know where to get one. Thanks
>
>-------------- Original message --------------
>
> > --> AeroElectric-List message posted by: dsvs@comcast.net
> >
> > Bob and others,
> > Does anyone have information on the type of stripper to use on RG142. I
> find
> > many strippers for rg59 and rg6 but none for RG142. . Bob I think you
> had a
> > stripper at your Long Beach class, if that is usable on RG142 could you
> let me
> > know where to get one? Thanks in advance. Don
---
Message 19
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| Subject: | Eye of newt, tail of frog and have you tried a cat's |
whisker?
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
>
>Good Choice!
>
>However, I have been waiting for one of the antenna experts to comment on
>the use of a ground plane.
>
>Please feel free to correct me thoroughly, but my understanding is that a
>ground plane allows us aviators to use a shorter antenna. That is generally
>considered good. A ground plane can consist of four to six radial strips of
>wire, foil, or any other conductive material. It is best if they are
>perpendicular to the antenna, but angles away from the antenna will work
>quite well.
>If the angle between the antenna and the ground plane is acute, they don't
>work very well.
Pretty accurate. View radials of a ground plane as lots of antennas in
parallel. The base impedance of a single 1/4 wave monopole antenna is about
35 ohms. We'd like for this antenna to work against a ground plane of
zero ohms . . . like a flat sheet of silver plated copper that is infinite
in all directions from the base of the antenna. A close approximation of
this can be obtained by attaching a series of antennas (all about 35 ohms
each) in parallel. In very rough, round numbers, 4 radial antennas
paralleled
at the base of the monopole radiator gives us a "ground" resistance on the
order of 8 ohms . . . 8 radials would be 4 ohms, etc. As it turns out,
4 radials works pretty good such that addition of more radials has
a diminishing return on investment for the effort. So, 4 to 8 radials
under your antenna is fine.
Now, these have to be treated as if they are antennas and therefore
must be full physical length unless you put some kind of loading inductance
in the middle which has the effect of making the element appear electrically
longer than it is physically. I've seen portable antennas comprised of 5
identical monopole elements, all center loaded, any one of which could be
stuck to the center connector to act as a radiator while the remaining four
were stuck onto radial connectors at the base. The end result was a vertical
monopole antenna with ground plane where physical size was smaller than its
electrical size.
The ground plane doesn't enable "shortening" of the antenna. For example,
the five element array cited above could just as easily have two or three
full sized elements substituted for the electrically "loaded" elements
and the differences would be transparent in terms of overall performance
of the whole array. So, one could use any combination of loaded or full
size radiators -OR- ground plane radials with no appreciable difference
in performance.
>If you but the ground plane wires, or strips, on a curved belly or curved
>top of a fuselage, they will work very well if the antenna is outside the
>fuselage. If you put the antenna inside the airplane, that makes the
>angle from
>the ground plane acute and it won't work very well.
The operative phrase is "work very well" which is totally
undefined. I've often suggested on this list that a wet string will
work to replace a high dollar, gold plated, talk-to-Mars antennas
in some applications. One example is a LOC/GS system that's never used
for en route VOR navigation. Off the end of the runway, you're looking
right down the gun barrel of gain transmitting antennas painting
your face with with lots of watts going into them. It doesn't take
much in the way of antenna efficiency to fly the ILS.
Let's talk about radial angle-of-the-dangle. Suppose you increase
the angle with the radials drooping downward more and more until
they are tightly bundled. You now have a dipole. Each radial is
so tightly coupled to the others that it no longer behaves as
an independent element and the sum total of radials appear as if
they're the second half of a dipole and it too has a resistance
of about 35 ohms. Now we have a dipole with feedpoint impedance of
about 70 ohms.
Okay, fan them upward and they begin to act independently as they
separate from each other. The impedance of the radial centers drops
toward the 4-8 ohm figure we discussed earlier. Total feedpoint
impedance comes down . . . in fact, at some propitious angle between
180 and 90 degrees, the center feedpoint impedance of the radials
is about 15 ohms added to 35 ohms of the radiator gives you a
50 ohm match to 50 ohm coax. A further benefit of drooped radials
is a lower angle for maximum radiation of the antenna bringing
it's max performance look-angle down toward the horizon. Raise
the radials too far and the look angle goes up toward useless
and the SWR climbs due to really whacked feedpoint impedance.
This explains the very common drooped radial configuration
one sees on VHF and UHF communications antennas around
airports. SWR is lower, radiation angle is lower.
It turns out that you get a slightly better performing
antenna on a composite airplane with radials "drooped"
down around fuselage curvature than you will for a
top mounted antenna on a Cessna with acres of top wing
skin for a ground plane.
>Now, having said all that, most antennas work reasonably well even if all of
>the "rules" are disregarded. One of the most popular speed kits for a
>common certificated airplane uses a communication antenna mounted
>horizontally in
>the tail cone with a very much "too small" a ground
>plane. Shouldn't work at
>all according to common knowledge. My friends who use that speed kit's
>antenna mount tell me it works just fine!
Yup. I can tell you that virtually EVERY anecdotal pronouncement about
antenna performance is next to meaningless without comparative data.
I've had two folks whack each other soundly taking opposite sides
of an opinion on identical antenna installations. Turns out that
one never talks to anyone outside an airport traffic area and the
other guy was trying to hit RCOs that were 50 miles away while
1000 feet over the terrain. One guy expected nothing and thought
it worked great, the other guy expected too much and thought it
was lousy.
Bottom line is, try anything and see how it works for the way
you need it to work. Anecdotal info from other builders is useful . . .
it often helps you weed out really bad designs but always
be suspicious of rock-throwing contests between folks in the
"tis so, taint so" mode of conversation. If you have to know
how it REALLY works, I can help you set up a test plan to go
explore both relative response (gain) and pattern for any
given installation.
Bob . . .
---
Message 20
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--> AeroElectric-List message posted by: "John Tvedte" <JohnT@comp-sol.com>
Qm9iLCANCiANClRoYW5rcyBmb3IgdGhlIGluZm8gb24gdGhlIEZsdWtlIDg3ICYgWmVicmEgc3Rp
cCBjbGVhbmluZy4gIE15IEZsdWtlIHdvcmtzIHBlcmZlY3RseSBub3cgLSANCiANCkpvaG4NCiAN
CkRvIG5vdCBhcmNoaXZlDQo
Message 21
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| Subject: | Slobovia Outernational Flyin Invitation |
--> AeroElectric-List message posted by: Charlie England <ceengland@bellsouth.net>
If you can make it to central Mississippi on Oct. 16, I'd like to invite
you to Slobovia Outernational's fall flyin just north of Jackson MS.
The fun starts at 10:00 AM & lunch will be served at noon. You are
welcome to overnight either Friday or Saturday. Just email or call so we
can plan for supper/breakfast, throw a bedroll in the plane/car & 'come
on down'.
No formal programs are scheduled, just lots of airplane rides, food &
'homebuilt conversation'.
Info on our airport can be found at
http://www.airnav.com/airport/MS71
FAA Identifier: MS71
Lat/Long: 32-29-42.508N / 090-17-34.325W
32-29.70847N / 090-17.57208W
32.4951411 / -90.2928681
UNICOM: 122.75
Disclaimer: Slobovia is a private airport. Pilots operate at their own
risk. Please be alert for both very slow & very high speed aircraft
around the airport; we are an 'equal opportunity airport'.
If you need driving directions or more info, feel free to email me at
ceengland@bellsouth.net
or call at 601-879-9596.
Ya'll come!
Charlie
Message 22
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| Subject: | yellow and blue wires? |
--> AeroElectric-List message posted by: Bobby Hester <bhester@hopkinsville.net>
Ok, I know I've seen them on Bob's or B&C's site but I can't find them
anywhere. It's those diodes that go on the Battery and Starter
contactors. I saw them premade for sale, I thought. Where are they?
--
Surfing the Web from Hopkinsville, KY
Visit my web site at: http://www.geocities.com/hester-hoptown/RVSite/
RV7A Slowbuild wings-QB Fuse :-)
Message 23
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| Subject: | yellow and blue wires? |
--> AeroElectric-List message posted by: "Franz Fux" <franz@lastfrontierheli.com>
Vans sells them they are in the web store,
Franz
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Bobby
Hester
Subject: AeroElectric-List: yellow and blue wires?
--> AeroElectric-List message posted by: Bobby Hester
<bhester@hopkinsville.net>
Ok, I know I've seen them on Bob's or B&C's site but I can't find them
anywhere. It's those diodes that go on the Battery and Starter
contactors. I saw them premade for sale, I thought. Where are they?
--
Surfing the Web from Hopkinsville, KY
Visit my web site at: http://www.geocities.com/hester-hoptown/RVSite/
RV7A Slowbuild wings-QB Fuse :-)
---
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