Today's Message Index:
----------------------
1. 01:20 AM - Re: Dorsil Fins (TeamGrumman@aol.com)
2. 07:05 AM - Carbon Fiber (James Grieco)
3. 08:04 AM - Re: Dorsal Fins (Bradley Kidder)
4. 09:58 AM - Re: Dorsal Fins (TeamGrumman@aol.com)
5. 10:28 AM - Re: Dorsal Fins (Gil Alexander)
6. 11:01 AM - Re: Dorsal Fins (Gil Alexander)
7. 05:20 PM - Madison picnic: Sat. 8 May '04 (David Feinstein)
Message 1
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--> TeamGrumman-List message posted by: TeamGrumman@aol.com
In a message dated 05/06/04 8:17:19 PM, gilalex@earthlink.net writes:
> Gary ... won't a carbon fiber dorsal fin screw up the GPS antenna reception
> if it's mounted in the standard location alongside the dorsal?
>
> Might also affect the standard VHF antennae....
>
> gil in Tucson
>
I don't know. Will it? Why should it?
Message 2
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pts rule name description
---- ---------------------- --------------------------------------------------
-0.0 BAYES_40 BODY": Bayesian.spam.probability.is.40.t
--> TeamGrumman-List message posted by: James Grieco <jamesgrieco@yahoo.com>
I read in a recent issue of Custom Planes or Kitplanes that the
carbon fiber did not reduce gps antenna reception by much at all
in some tests done by some sparky guy that writes the
electronics columns.
<<Gary ... won't a carbon fiber dorsal fin screw up the GPS
antenna
reception
if it's mounted in the standard location alongside the dorsal?
Might also affect the standard VHF antennae....
gil in Tucson
<<
__________________________________
http://hotjobs.sweepstakes.yahoo.com/careermakeover
Message 3
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--> TeamGrumman-List message posted by: Bradley Kidder <sparksnmagic@usa.net>
I know that all of the satellites in orbit around Arkansas are way up in
the sky. Dorsal fins, whatever the material, would not affect reception of
a GPS antenna that wasn't mounted INSIDE the dorsal fin. The only time it
might affect reception otherwise would be in a tail-high vertical
situation, during which GPS reception would be the least of your worries.
At 03:17 AM 5/7/2004, you wrote:
>--> TeamGrumman-List message posted by: TeamGrumman@aol.com
>
>
>In a message dated 05/06/04 8:17:19 PM, gilalex@earthlink.net writes:
>
>
> > Gary ... won't a carbon fiber dorsal fin screw up the GPS antenna reception
> > if it's mounted in the standard location alongside the dorsal?
> >
> > Might also affect the standard VHF antennae....
> >
> > gil in Tucson
> >
>
>I don't know. Will it? Why should it?
><((((=BA>`=B7.=B8=B8.=B7=B4=AF`=B7.=B8.=B7=B4=AF`=B7...=B8><((((=BA>
=B7=B4=AF`=B7.=B8. , . .=B7=B4=AF`=B7.. ><((((=BA>`=B7.=B8=B8.=B7=B4=AF`=B7.=B8.=B7=B4=AF`=B7...=B8><((((=BA>
Bradley Kidder
N188FW AA-1 #124 "Hawg One"
NTSB / EAA / AOPA / AYA
Message 4
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--> TeamGrumman-List message posted by: TeamGrumman@aol.com
In a message dated 05/07/04 8:11:36 AM, sparksnmagic@usa.net writes:
Dorsal fins, whatever the material, would not affect reception of
> a GPS antenna that wasn't mounted INSIDE the dorsal fin.=A0 The only time=20it
> might affect reception otherwise would be in a tail-high vertical
> situation, during which GPS reception would be the least of your
>
OK, I plan to locate my GPS antenna(s) on the glare shield. However, the
plan was ALSO to locate the comm antennas INSIDE the dorsil fin. I have done
this with fiberglas dorsil fins on a few occasions and had really good
reception. Will the Carbon-Fiber dorsil fin have an effect on the reception of
the
comm antenna?
Message 5
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--> TeamGrumman-List message posted by: Gil Alexander <gilalex@earthlink.net>
Bradley,
In Arizona, the GPS satellites can be "seen" from any position in
the sky, not just overhead. My comments were for normal straight and level
flight....
The point was that the GPS antenna is often mounted right
alongside the dorsal fin, and if the carbon fibre acts the same as a metal,
it would shield the antenna from signals coming from one quadrant.
I'll ask our RF GPS antenna experts at work on Monday.....
Gary ... I'll also ask about installing a VHF antenna inside a carbon fibre
structure.
...gil A
At 08:01 AM 5/7/2004, you wrote:
>--> TeamGrumman-List message posted by: Bradley Kidder <sparksnmagic@usa.net>
>
>I know that all of the satellites in orbit around Arkansas are way up in
>the sky. Dorsal fins, whatever the material, would not affect reception of
>a GPS antenna that wasn't mounted INSIDE the dorsal fin. The only time it
>might affect reception otherwise would be in a tail-high vertical
>situation, during which GPS reception would be the least of your worries.
>
>At 03:17 AM 5/7/2004, you wrote:
> >--> TeamGrumman-List message posted by: TeamGrumman@aol.com
> >
> >
> >In a message dated 05/06/04 8:17:19 PM, gilalex@earthlink.net writes:
> >
> >
> > > Gary ... won't a carbon fiber dorsal fin screw up the GPS antenna
> reception
> > > if it's mounted in the standard location alongside the dorsal?
> > >
> > > Might also affect the standard VHF antennae....
> > >
> > > gil in Tucson
> > >
> >
> >I don't know. Will it? Why should it?
>
>
> ><((((=BA>`=B7.=B8=B8.=B7=B4=AF`=B7.=B8.=B7=B4=AF`=B7...=B8><((((=BA>
>=B7=B4=AF`=B7.=B8. , .
>.=B7=B4=AF`=B7.. ><((((=BA>`=B7.=B8=B8.=B7=B4=AF`=B7.=B8.=B7=B4=AF`=B7...=B
>8><((((=BA>
>Bradley Kidder
>N188FW AA-1 #124 "Hawg One"
>NTSB / EAA / AOPA / AYA
>
>
Message 6
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--> TeamGrumman-List message posted by: Gil Alexander <gilalex@earthlink.net>
An update... quoted from the Comant web site
http://www.comant.com/htmls/guide2.html
"Mounting Locations
GPS antennas must be mounted on the top of the aircraft and be oriented
parallel to the horizon to assure maximum visibility of the satellites that
provide positioning data. The optimum antenna location must not be "shaded"
by any structure or by other antennas.
For aircraft, the optimum antenna location is at a high point on the cabin
when viewed in level flight and away from projections such as a propeller,
tail surfaces, or the shadow of larger antennas."
The question is wether the carbon fibre is conductive and acts like
metal at GPS frequencies. If it does act like a metal, then it would
certainly be "shaded" by the description above.... I'll let the experts
answer it Monday....
...gil A
At 10:25 AM 5/7/2004, you wrote:
>--> TeamGrumman-List message posted by: Gil Alexander <gilalex@earthlink.net>
>
> Bradley,
> In Arizona, the GPS satellites can be "seen" from any position in
>the sky, not just overhead. My comments were for normal straight and level
>flight....
>
> The point was that the GPS antenna is often mounted right
>alongside the dorsal fin, and if the carbon fibre acts the same as a metal,
>it would shield the antenna from signals coming from one quadrant.
>
> I'll ask our RF GPS antenna experts at work on Monday.....
>
>Gary ... I'll also ask about installing a VHF antenna inside a carbon fibre
>structure.
>
> ...gil A
>
>
>At 08:01 AM 5/7/2004, you wrote:
> >--> TeamGrumman-List message posted by: Bradley Kidder
> <sparksnmagic@usa.net>
> >
> >I know that all of the satellites in orbit around Arkansas are way up in
> >the sky. Dorsal fins, whatever the material, would not affect reception of
> >a GPS antenna that wasn't mounted INSIDE the dorsal fin. The only time it
> >might affect reception otherwise would be in a tail-high vertical
> >situation, during which GPS reception would be the least of your worries.
> >
> >At 03:17 AM 5/7/2004, you wrote:
> > >--> TeamGrumman-List message posted by: TeamGrumman@aol.com
> > >
> > >
> > >In a message dated 05/06/04 8:17:19 PM, gilalex@earthlink.net writes:
> > >
> > >
> > > > Gary ... won't a carbon fiber dorsal fin screw up the GPS antenna
> > reception
> > > > if it's mounted in the standard location alongside the dorsal?
> > > >
> > > > Might also affect the standard VHF antennae....
> > > >
> > > > gil in Tucson
> > > >
> > >
> > >I don't know. Will it? Why should it?
> >
> >
> > ><((((=BA>`=B7.=B8=B8.=B7=B4=AF`=B7.=B8.=B7=B4=AF`=B7...=B8><((((=BA>
> >=B7=B4=AF`=B7.=B8. , .
> >.=B7=B4=AF`=B7.. ><((((=BA>`=B7.=B8=B8.=B7=B4=AF`=B7.=B8.=B7=B4=AF`=B7...=B
> >8><((((=BA>
> >Bradley Kidder
> >N188FW AA-1 #124 "Hawg One"
> >NTSB / EAA / AOPA / AYA
> >
> >
>
>
Message 7
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"Northeast GrummanList" <ne-grumman@bronze.lcs.mit.edu>, <jon@jdyorke.com>
| Subject: | Madison picnic: Sat. 8 May '04 |
Qmail-Scrubber-Version: 1.00
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--> TeamGrumman-List message posted by: "David Feinstein" <david@carneyaviation.com>
Weather is looking GOOD for the Madison Rites of Spring Fly-In Picnic and
Great Lie-Swapping Olympics. Come join us at one of the last great
grass-roots airports tomorrow, the 8th of May.
Details (in painful detail) and weather links are available at
http://carneyaviation.com/madpicnic.htm.
This is strictly a VFR fly-in. The site just mentioned has links to prog
charts, and a last-minute update will be posted there about 6:30 Saturday
morning.
It looks like a beautiful day coming up, and we expect a fair sized crowd
(RSVPs still appreciated to david@carneyaviation.com - include the words
"Madison picnic" in your subject line).
Use your eyes and ears a lot, and your mouth just a little bit. The airport
is known as either Madison or Griswold - listen for both names, and expect to
land on RW 24 - if things are favoring that direction even a little bit , the
seabreeze effect usually tips the balance.
Forecasts as of 8 PM Friday evening:
KBDR 072330Z 080024 33012G18KT P6SM BKN250
FM0300 36009KT P6SM BKN120 BKN250
FM0700 01008KT P6SM BKN120 BKN250
FM1100 05010KT P6SM OVC100
FM1700 12007KT P6SM BKN100
FM2100 16007KT P6SM OVC070
KGON 072330Z 080024 35010KT P6SM FEW070 SCT250
FM0200 36010KT P6SM BKN120 BKN250
FM0800 01010KT P6SM BKN120 BKN250
FM1100 05012KT P6SM OVC100
FM1700 12010KT P6SM BKN100
FM2100 16010KT P6SM BKN100
KISP 072330Z 080024 32012G18KT P6SM BKN250
FM0300 36010KT P6SM BKN120 BKN250
FM0700 02010KT P6SM BKN120 BKN250
FM1100 05011KT P6SM OVC100
FM1700 11009KT P6SM BKN100
FM2200 14009KT P6SM OVC070
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