Today's Message Index:
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1. 03:37 PM - DME Channeling (splevy@l-band-systems.com)
2. 06:57 PM - Re: DME Channeling (Pete Waters)
Message 1
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--> Avionics-List message posted by: splevy@l-band-systems.com
I am looking into adding a DME unit. Hopefully some one can answer a
couple of questions:
Can a King KN62/4 DME be interfaced to the channeling outputs of a Narco
122 nav unit?
Where can I find the pin connection information on the King DMEs?
Thanks for any help.
Stan
Message 2
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| Subject: | Re: DME Channeling |
--> Avionics-List message posted by: Pete Waters <pedroagua@yahoo.com>
Stan,
I went though this same question about a year ago. I concluded that the KNS-80,
which has DME built in to a VOR / ILS box equiiped with RNAV function, was
the most cost-effective way to get DME. Stand-alone DMEs seem to cost a bundle
an really provide very little -- just a distance to a ground station. With
the KNS-80 you also get VOR-based RNAV capability (although you can only program
a maximum of four waypoints at a time). However, this lets you fly to fixes
defined by a radial and a DME and simply follow your CDI needles like you're
tracking a radial. The DME countdown will tell you when you get there.
A downside is that there are limited numbers of indicators that are compatible
with the KNS-80. The usual KI-209 that goes with the usual KX-155 won't work.
A KI-206 will work, but it's more expensive, so you'll lose mone on the trade-in.
Another thing to think about is that you probably don't want DME per se, you
want DME **function**. As far as I know, this can be supplied by the DME readout
of a GPS if the GPS is certified for that type if flight. I.e. if you want
to use the DME readout of a GPS for en route IFR nav, it's got to be an enroute-approved
IFR GPS. I'm not sure what the rule is for approaches...since 1/10th
of an NM on a DME readout is 600 feet, and approach-certified GPS's are tighter
than that, I'd think that you could use GPS "DME" on, say, a VOR/DME or
ILS/DME approach (especially on an arc or to define a missed approach point),
but I'd like a second opinion on that.
Full-disclosure here -- I actually bought a used KNS-80 and KI-206 about a year
ago for installation in my RV-4. Since then, I've decided to go with a approach-certified
GX-60 and NAV-122 combo, mostly becasue of weight and space in
the tight RV panel, and so I could shoot GPS approaches. You might want to check
out that path as well. Otherwise, note that I'm planning on selling the
KNS-80 and KI-206 in a few weeks. Contact me off list if you might be interested
in it.
If you want to buy from a vendor, you can get the KNS-80 / KI-206 combo from
Eastern Avionics (among other places). In the least, you can check out their
website for a description.
- Pete Waters
N562PW
splevy@l-band-systems.com wrote:
--> Avionics-List message posted by: splevy@l-band-systems.com
I am looking into adding a DME unit. Hopefully some one can answer a
couple of questions:
Can a King KN62/4 DME be interfaced to the channeling outputs of a Narco
122 nav unit?
Where can I find the pin connection information on the King DMEs?
Thanks for any help.
Stan
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