VOR Error

jtsastre

jtsastre

Well-Known Member
I repositioned a plane in preparation for lesson with an IFR student and did a VOR ground checkpoint test on the #1 VOR. It was off by 30 degrees or more, also it didn't sync up with the GNS430 OBS course. It got me thinking, how does this happens physically with the VOR indicator and how is it fixed mechanically? Thanks.

Jtsastre
 
It has something to do with the flux capacitor and the electrojizzmaticcoupler.

All I know is if you report a problem with it, and it is confirmed, that they Notam it OTS and fix it. AUG had a NASTY problem with it on the VOR 35 (or something) and it took us complaining loudly a few times for them to shut it down. Works great now (last time I was there anyhow).
 
jynxyjoe said:
It has something to do with the flux capacitor and the electrojizzmaticcoupler.

All I know is if you report a problem with it, and it is confirmed, that they Notam it OTS and fix it. AUG had a NASTY problem with it on the VOR 35 (or something) and it took us complaining loudly a few times for them to shut it down. Works great now (last time I was there anyhow).
Click to expand...

I think he's talking about the unit inside the airplane, not the big funny shaped one that sits out in the field.
 
SteveC said:
not the big funny shaped one that sits out in the field.
Click to expand...
The witch's hat?

I used to know a little about the insides of a VOR CDI... I know that in old-fashioned ones theres a couple of coils and stuff. I would imagine that in a newer one it's mores solid state... but I would guess that something has broken down in the indicator itself and the only way to fix it is to replace the CDI.
 
Affirmative, I was referencing the actual VOR indicator. The VOR itself was working properly according to the #2 VOR.

Jtsastre
 
jtsastre said:
Affirmative, I was referencing the actual VOR indicator. The VOR itself was working properly according to the #2 VOR.

Jtsastre
Click to expand...

I think it might be as simple as turning a few screws. One of my instrument students who owned his own airplane had the same issue. The avionics shop fixed it in a few minutes on the ramp. Not sure of the actual mechanical issue.
 
Anyone ever encounter an inaccuracy that varied with position around the VOR? E.g., the error was twice as big off the 270° radial than it was on the 090° radial.
 
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