3934V
- Thread starter Tom-D
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It appears to be a dual ADF indicator, and should be used with two ADF receivers. Used for cross-bearings and, in some places, for approaches to runways with two NDBs in line with the runway (very popular means of approach in Russia).
Has the plane got an ADF? Surely not two, but perhaps someone got a deal on the indicator.
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Similar to, but older than, this: http://www.bennettavionics.com/ki228.html
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kgruber
Final Approach
No. It is an electric compass.
You set the direction you want to go with the knob and try to keep the needle in the center.
They are WWII surplus and the only ones I've seen are like Tom's, about to be removed.
You set the direction you want to go with the knob and try to keep the needle in the center.
They are WWII surplus and the only ones I've seen are like Tom's, about to be removed.
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Greg Bockelman
Actually, what it looks like to ME is a dual RMI. Points to the VOR station just like pointing to an NDB.
Or one each? And electric compass sounds good, too, for the compass rose.
Now I see that I completely overlooked the sensor in the fuselage.
I know less than nothing about "electric compasses," but presume someone here can tell us more.
Tom-D
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kgruber
Final Approach
It is a compass only. It has no ADF or VOR function. In fact, it was made before ADF or VOR.
No. You should not keep it. It should go in the same pile as that WWII horizon.
No. You should not keep it. It should go in the same pile as that WWII horizon.
What I find amazing is the great condition it is in, considering it is 60 years old....
kgruber
Final Approach
Toss the DG as well.
There, I saved you about 50 pounds!!
There, I saved you about 50 pounds!!
Nope, not enough knobs, it is the electronic compass, I pulled one out of a Navion before.
dell30rb
Final Approach
I know this is going to be a VFR only plane but a DG would be nice to have if ever flying into a towered airport.
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So why are the needles there?
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Pilawt
Sure looks like an RMI to me. Wider needle points to LF station; thin needle points to VOR.
http://www.etsy.com/listing/107236527/industrial-chic-radio-magnetic-indicator
http://en.mimi.hu/aviation/radio_magnetic_indicator.html
http://www.etsy.com/listing/107236527/industrial-chic-radio-magnetic-indicator
http://en.mimi.hu/aviation/radio_magnetic_indicator.html
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What knobs do you need for an RMI? Or ADF needles for that matter?
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I am with whoever said ditch this unit AND the DG. LOL
Tom-D
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Nope not a RMI, I know one of them when I see it.
Yeah, but I think he means to replace with a modern gyro which will also be considerably lighter.
Fearless Tower
Touchdown! Greaser!
Tom,
Does the AI still work?
If it does and you are looking to get rid of it, I may be interested.
Does the AI still work?
If it does and you are looking to get rid of it, I may be interested.
The RMI I used had two radio selector knobs at the bottom for VOR 1&2 and ADF 1&2, I think it was a Rockwell unit in the Jetstream but not sure.
This unit has no Radio input, how can it be an RMI?
kgruber
Final Approach
It is an electric compass. You set the direction you want to go and keep the needle in the parallel lines.
Here is one on eBay for sale:
Here is one on eBay for sale:
skyflea
Pre-Flight
course selector
Tom-D
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Might be handy when you are tracking one VOR to the next.
It appears in good condition, does it work?
Tom-D
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Who knows, I sure don't, I've never had a battery in this aircraft.
Drag one out and power it up.
Tom-D
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I'm not interested enough to activate a new battery this early in the restoration.
Is it 12 volt? Just hook it up to your car battery.
Tom-D
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like I said, I'm not that interested.
You gonna just leave it in place then?
denverpilot
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Those are interesting as museum pieces. Heh.
Matthew
Touchdown! Greaser!
What I think is cool about old instruments and radios like these - at one time they were the standard. Not necessarily top of the line at the time, but the workhorses of the business. Now we don't even know what some of them are anymore!
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Here's a panel of a 1951 C-170A, photo taken when the airplane was only 15 years old. It has a similar instrument, with only the word "Direction" on the face. Note the Narco Superhomer nav/com with analog receiver and ten (count 'em) transmitting channels.
Tom-D
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for now, we got other things that take a higher priority. It will fly like that, but it won't until I get the engine up grade completed.
Tom-D
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also note there is no gyros. just a vac driven needle ball.
kgruber
Final Approach
Here's a panel of a 1951 C-170A, photo taken when the airplane was only 15 years old. It has a similar instrument, with only the word "Direction" on the face. Note the Narco Superhomer nav/com with analog receiver and ten (count 'em) transmitting channels.
Thanks for reminding me. We have dinner company at 5. I need to grind some coffee!
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