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JRBarrett

RMI bug

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I don’t know if this bug has always been present in the Falcon. I just spotted it tonight while flying Beta 3.4 in P3D 4.3

I noticed that when an ILS is tuned on either NAV 1 or NAV 2, the associated RMI needle turns to point at the physical location of the localizer transmitter. This is impossible, because a localizer signal (unlike a VOR) contains no phase modulation which would permit the RMI to resolve a bearing to it.

An RMI needle will usually rotate to its normal “no signal” position (typically 90 degrees) when a localizer is tuned.

If others are not seeing this, then perhaps it is related to the installation of the RXP GTN750, which I just purchased today. 

Jim Barrett

 

 


Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

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44 minutes ago, JRBarrett said:

I don’t know if this bug has always been present in the Falcon. I just spotted it tonight while flying Beta 3.4 in P3D 4.3

I noticed that when an ILS is tuned on either NAV 1 or NAV 2, the associated RMI needle turns to point at the physical location of the localizer transmitter. This is impossible, because a localizer signal (unlike a VOR) contains no phase modulation which would permit the RMI to resolve a bearing to it.

An RMI needle will usually rotate to its normal “no signal” position (typically 90 degrees) when a localizer is tuned.

If others are not seeing this, then perhaps it is related to the installation of the RXP GTN750, which I just purchased today. 

Jim Barrett

 

 

Jim,

As I recall this has been a long standing bug in the sim(s) themselves.  For example, try setting Nav2 to a localizer in the default Baron 58 and note the RMI needle.

Al

Edited by ark

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1 hour ago, JRBarrett said:

 

If others are not seeing this, then perhaps it is related to the installation of the RXP GTN750, which I just purchased today. 

Jim Barrett

 

 

Good choice on the RXP GTN750.

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7 hours ago, ark said:

Jim,

As I recall this has been a long standing bug in the sim(s) themselves.  For example, try setting Nav2 to a localizer in the default Baron 58 and note the RMI needle.

Al

I’ll give that a try! I’m sure real world pilots would like it if an RMI could point to a localizer. It would make the process of setting up an ILS intercept easier - especially in an aircraft without a GPS or FMS-driven moving map.


Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

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