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currydon(at)bellsouth.net
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 Posted: Fri Feb 15, 2008 5:39 am Post subject: Loran Antenna |
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Many believe Loran is dead technology, but I'm not one of them. Old, yes;
stale, yes; but dead, no! In fact, I'm including a KLN-88 in a panel
project on a Tiger. Which brings me to my question. I have room in my
wingtips for the KA-84 antenna, but I'm concerned about reception. Is
"ground plane" an issue with Loran? If so, would the wingtip location
provide sufficient ground plane? Are there any other reasons to NOT
consider the wingtips as a location for the antenna? Also, while I don't
currently have strobe lights in my wingtips, I would like to retain the
option of installing them in the future. Since I'm certain that strobe
lights would interfere with Loran reception, is there some type of shielding
that I could install along with the strobes to prevent the interference?
Don
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Fri Feb 15, 2008 6:28 am Post subject: Re: Loran Antenna |
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Loran IS dead, but still walking.
The sizing mechanics of VLF antenna is completely different than
VHF (com/nav) or Microwave (GPS). In the latter two, a ground plane
should be in the range of 1/4-1/2 wavelength radius , depending on
config of antenna.
In VLF, wavelength may be 100-1000x size of your Tiger.
Best Loran antenna is a trailing wire 1 half mile long  No ground
required!
I have an uninstalled 618, can I sell it to you? Nice paperweight!
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Ira N224XS |
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BobsV35B(at)aol.com
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| Posted: Fri Feb 15, 2008 6:58 am Post subject: Loran Antenna |
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Good Morning Ira,
I suppose this will start an argumentative string, but I agree with you.
For the time being, LORAN as we have used it, is dead.
There may be something new on the horizon, but the best currently available LORAN set can't hold a candle to a 100 dollar handheld from K-Mart.
The newly proposed eLORAN (Enhanced Loran) is being proposed primarily as device to back up the timing and coordination capabilities of GPS. It is not meant to be a primary navigation device. I realize that the engineers will undoubtedly come up with newer antenna systems, but when eLoran was first proposed several years ago, the suggested antenna array was bigger than a Bonanza.
The KLN-88 is a very nice component to use with a flight management system. It does have the capability of feeding data to many sophisticated navigation devices that were in common use twenty years ago.
My feeling is that it belongs in a museum to be used to point out how much better are the devices we currently use.
Do Not Archive
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
628 West 86th Street
Downers Grove, IL 60516
630 985-8502
Stearman N3977A
Brookeridge Air Park LL22
In a message dated 2/15/2008 8:38:59 A.M. Central Standard Time, ira.rampil(at)gmail.com writes:
| Quote: | --> AeroElectric-List message posted by: "rampil" <ira.rampil(at)gmail.com>
Loran IS dead, but still walking.
The sizing mechanics of VLF antenna is completely different than
VHF (com/nav) or Microwave (GPS). In the latter two, a ground plane
should be in the range of 1/4-1/2 wavelength radius , depending on
config of antenna.
In VLF, wavelength may be 100-1000x size of your Tiger.
Best Loran antenna is a trailing wire 1 half mile long No ground
required!
I have an uninstalled 618, can I sell it to you? Nice paperweight!
--------
Ira N224XS
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The year's hottest artists on the red carpet at the Grammy Awards. AOL Music takes you there.
[quote][b]
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mlas(at)cox.net
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| Posted: Fri Feb 15, 2008 7:07 am Post subject: Loran Antenna |
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Don,
A more constructive response would have been something like this, nice
multi-chain (KLN-8 Loran and it works well. Because of the FREQ range
that system works in it is highly susceptible to poor gain and
interference with the short antennas required for aircraft. Many Lorans
require an amplifier/processor to enhance the signal to make it usable
in aircraft. Most of the hard core Loran users have experienced
reception problems with loran in clouds, prcip, ect. I have not seen,
installed, or tested an internally mounted Loran antenna but my Guess is
the performance would be reduced, possibly to less then acceptable.
Mike
And like you I like a GOOD Loran (unlike the 614) for area navigation.
--
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