IADS - Display Builder - Heading information.

[Endrigo]

Hello!

We have available in IADS real time software some options of display to show us the heading from aircraft in the telemetry room.

I am using one that is needed input parameters like altitude, airspeed, side slip and heading.

Regarding the heading, the input is a label of magnetic heading from ELECTRONIC STANDBY INSTRUMENT SYSTEM (ESIS).

If I put a numeric display to show that parameter, The IADS is showed me the magnetic heading but, in the display that I choose to show me the value with compass graphic is different.

I believe that IADS is using the magnetic heading as a input but, the indication in the display is true heading.

Do you know, where in the IADS, Can I see the formula or something like that?

I have tried to check in the properties but, I did not find anything.

Appreciate your help.

Thank you.

Endrigo.

[Chant, Adam]

Endrigo,
The Input for Heading in the various IADS displays is as follows:
Input Range: 0-360

N = 0

E = 90

S = 180

W = 270

 

If that is not how your input parameter is represented then you’ll have to make a derived equation to translate your input to match the IADS display Object.

Alternatively you can use the Dynamics Wizard [fx] for the Heading Property to modify it as necessary to eliminate having to create a derived parameter, but it can be harder to troubleshoot it when the equation is embedded in the display object.

Thank you,

Adam Chant

Project Engineer, IADS

 

Curtiss-Wright

190 Sierra Court A-3 Palmdale, CA 93550

T: 661.273.7003 x210
ach...@curtisswright.com
iads-s...@curtisswright.com

 

From: ia...@googlegroups.com <ia...@googlegroups.com> On Behalf Of Endrigo
Sent: Monday, September 5, 2022 10:55 AM
To: IADS <ia...@googlegroups.com>
Subject: [IADS] IADS - Display Builder - Heading information. [EXTERNAL]

 

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[James Bretz]

Hi Endrigo,

Sorry, I'm a bit confused. It sounds like you are saying that you are using a display for the heading and the value shown is not the same value as the parameter. Is that correct? If so, that is new to me and I'll have to investigate.

Can you please tell us the type of the display you are using? To do this, right click on the display and select "Properties..." and look at the top of the Properties sheet window. The display type should be in the drop down menu. For example, if the display is the "PrimaryFlightDisplay" it should say something like "PrimaryFlightDisplay1 IadsPrimaryFlightDisplay".

Also, please tell us the property name used to attach the parameter. For instance, is it called "Heading"?

As soon as we know the display type we can check the code to see if it's doing some kind of conversion with the input value,

Jim

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[Endrigo Avolio Vieira]

Hello Jim,

Yes! That is correct! I am using the same parameter in the display value and primary flight display.

It is easy to see in the attached file.

In the display value we have the same parameter as we can see in the properties from the primary flight display.

Display value = - 19.45 deg.
Compass in the primary display = 340 deg.

When the angle is positive the value is the same in both, if the angle is negative, IADS is adding 360 deg in the compass.

Thanks for the help.

Endrigo.

[Chant, Adam]

Endrigo,
All of the IADS heading displays use the industry standard 0-360 value to represent heading position.
The input can be of either +-180 or 0-360, but the displayed value is always going to show 0-360.
Do you have an example of a heading display showing negative value?
If you want to see the value negative then it will have to be from another display object like an ActiveX text.

Note that the graphics type used for the Primary Flight Display is always forward of ActiveX so you can’t normally place an ActiveX text on top of the PFD.

Thank you,

Adam Chant

Project Engineer, IADS

 

Curtiss-Wright

190 Sierra Court A-3 Palmdale, CA 93550

T: 661.273.7003 x210
ach...@curtisswright.com
iads-s...@curtisswright.com

 

From: ia...@googlegroups.com <ia...@googlegroups.com> On Behalf Of Endrigo Avolio Vieira
Sent: Wednesday, September 7, 2022 10:51 AM
To: ia...@googlegroups.com
Subject: Re: [IADS] IADS - Display Builder - Heading information. [EXTERNAL]

 

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Hello Jim,

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[Endrigo Avolio Vieira]

Hello Adam,

In attached you can see!

In the display value we have the same parameter as we can see in the properties from the primary flight display.

Display value = - 19.45 deg.
Compass in the primary display = 340 deg.

When the angle is positive the value is the same in both, if the angle is negative, IADS is adding 360 deg in the compass.

I would like to have the parameter as a primary flight display showing me in the telemetry room in the data recording at aircraft.

I know that it is possible to create a new parameter using as input the parameter 2700060_EU.

The Standby instrument from the aircraft is sending to the FTI system the label called magnetic heading represented by parameter 2700060_EU.

Creating a new parameter to see the value with range from 0 to 360 like primary flight display, the doubt is the name that I can use. For example, true heading? corrected heading?

Appreciate your help.

Endrigo.

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[James Bretz]

Hi Endrigo,

I think what Adam is trying to say is that a standard heading indicator shows from 0 to 360 degrees and not -180 to 180 (as might be your data source). Maybe this will help. Look at all the displays that appear on a google image search of "heading indicator aircraft" (https://www.google.com/search?q=heading+indicator+aircraft&tbm=isch&ved=2ahUKEwjct_3FxIP6AhWErGoFHTEzByEQ2-cCegQIABAA&oq=heading+indicator+aircraft&gs_lcp=CgNpbWcQAzIFCAAQgAQ6BAgAEBhQ1BJYnCBg3iFoAHAAeACAAagBiAGUBpIBAzguMZgBAKABAaoBC2d3cy13aXotaW1nwAEB&sclient=img&ei=FAEZY9zdL4TZqtsPseaciAI&bih=957&biw=1850&rlz=1C1GCEU_enUS855US859). If you can find a heading indicator graphic online that doesn't display 0 to 360, please send us a link.

So essentially, -20 would be displayed as 340 on any standard heading indicator. What I think that you're asking is for us to add a 'mode' to the display to show a scale of -180 to 180. Is that correct? If so, we would have to add a request to have the display code modified to add this new display mode. It doesn't currently do this right now.

Hope this helps,

Jim

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[Endrigo Avolio Vieira]

Hello Jim and Adam,

Sure, you are helping me a lot!

No, I am not asking to add a new feature!

I understood that to show the heading parameter in the compass the range is from 0 to 360, is a standard!