I don't think you really can....

If you have 2 planes of the same class, one that works and one that doesn't, you could compare the [Autopilot] section of the aircraft.cfg.

 

There might be some clues there.

 

I wouldn't compare a C172 to a B737 though.

 

regards,

Joe

Confirmed the default Lear 45 is off... tested at 200-150 and 130 kts and 90-45 and 30 degree intercept, in all cases it overshot, although a lot less at the lower speeds and intercept angles.

The localizer is designed to have two operating areas.

 

The course sector is the area in which the CDI is showing the proportional deviation from the course line.  It is sized such that at the runway threshold the sector width is approx 350 feet either side of the centerline.  It is normally expressed as the angle from left to right.  Nominally this is 6 deg (3 on each side of center) but that's a function of the runway length and localizer antenna distance from the runway).

 

The clearance sector is the area in which the CDI is required to be "pegged" on the correct side and is 35 deg either side of the course line out to a distance of 10 nm (for FAA).

 

You can use slew in FSX to move around at a distance of approx 10 nm and measure what the CDI gauge is showing in an aircraft vs ground position relative to the runway/localizer.

 

I don't know anything about gauge xml code, but looking at the Learjet pfd gauge what I see for the "HSI deviation bar" seems suspicious.

 

scott s.

.

Is this information based off of real life values or fsx programmed ones? Also what about the deviation bar seems suspicious?

 

Thanks for the explanation and info.

Is this information based off of real life values or fsx programmed ones? Also what about the deviation bar seems suspicious?

 

Thanks for the explanation and info.

 

 

What was suspicious is that the simulator value for the localizer deviation is a signed byte integer (-127/127) but looking at the gauge code it was clamped to only make the needle move from -60/60.  So I played around with the code and now I think it displays the way it should (AFAIK).  At an ILS with nominal beam width of 6 degrees, the needle when on the outer "dot" is 2.5 deg off course, which is what I found in some online documentation for Honeywell Primus avionics. 

 

If you want to try, in your simobjects\airplanes\lear45\panel folder there should be a file Lear_45_XML.cab.  Back that one up (note I think that one is installed by SP1 or SP2, it isn't the same file as the one with the same filename in the gauges folder, which I think is the original one).  Then just copy my mod version in to the panel folder and give it a shot.

 

https://www.dropbox.com/s/ohrsakp0iwx7yfl/Lear_45_XML.cab?dl=0

 

Note that this is the visible gauge only, doesn't do anything with the autopilot.

 

scott s.

.

My computer is telling me that this file seems malicious, and I have never seen that so I'll try to modify it myself. Thanks for the information though!

OK you have to pull pfd.xml out of the cab file.  In a text editor look for the gauge section beginning:

            <Element id="HSI Deviation Bar">

 After that you need to adjust the "Shift" section to look like

                <Shift id="Shift">
                    <Scale>0.210,0.000</Scale>
                    <Expression id="Expression">
                        <Minimum>-127.000</Minimum>
                        <Maximum>127.000</Maximum>
                        <Script>(A:HSI CDI needle, number)</Script>
                    </Expression>

(everything after that line is OK -  leave).  I replaced the pfd.xml file in the cab using cabdir.exe from the sdk.  There might be other cab building utilities out there.

 

scott s.

.

OK you have to pull pfd.xml out of the cab file.  In a text editor look for the gauge section beginning:

            <Element id="HSI Deviation Bar">

 After that you need to adjust the "Shift" section to look like

                <Shift id="Shift">
                    <Scale>0.210,0.000</Scale>
                    <Expression id="Expression">
                        <Minimum>-127.000</Minimum>
                        <Maximum>127.000</Maximum>
                        <Script>(A:HSI CDI needle, number)</Script>
                    </Expression>

(everything after that line is OK -  leave).  I replaced the pfd.xml file in the cab using cabdir.exe from the sdk.  There might be other cab building utilities out there.

 

scott s.

.

 

Scott, 

 

Got it figured out and fixed, thank you SO much. With that change and some other small add ons it flies like a dream now like it should! flawless intercepts now!