| Work in progress|
This article or section will be worked on in the upcoming hours or days.
Note: Although still incomplete, the information it contains is valid and available.
See for the latest developments.
|Status||under active development as of 02/2018|
The PAR (Precision Approach Radar) addon allows a Ground Controlled Approach (GCA) controller to deliver approach directives to the requesting aircraft.
|Is there any work on GCA (ground controlled approach) in progress, or have missed it? GCA is surprisingly accurate and easy to use, both as a pilot and a controller.
What PAR and GCA are
What can you expect from GCA
Arriving in the vicinity of the airport with little or no visibility, the pilot can request the GCA service.
The Controller, assisted by a PAR (Precision Approach Radar), will guide you through a safe path (both in heading and in altitude) that will take you to the head of the used runway.
How to install
|Note This is the latest version (Feb 22, 2018)|
Launch FlightGear including
--addon argument, for example:
fgfs <usual args> --addon=/path/to/PARaddon/
| Note From version 2017.4.0, the FlightGear launcher accepts the |
Otherwise, you can install it as a submodule. Contact the author for further instructions.
And that's all !
How to use it
When you are about 15 or 20 miles from your destination, tune the COM1 radio to an available ATC frequency (you can find them at Menu > Location > Airfield information or at the F12 dialog).
Press the > key to see the PAR instrument (you can open as many as you want). Verify the airport and runway destination.
On the screen you should see not only your plane but all the flying MP/AI in range. Adjust zoom if necessary.
Click the GCA button to request GCA assistance.
You will hear the GCA's answer "<callsign>, this will be a PAR approach to <airport> runway <rwy<."
Now, as you do not want to cheat, you should click the hide button. (Remember: This PAR is a ground instrument, not a flying one).
But not worry, once you have landed (or anytime, indeed) you can press the > key again to visualize and analyze your plotted trajectory.
Depending on your position and altitude, the GCA will give you a vector towards the base leg or towards the final one. Also will instruct to climb or descend if necessary.
Follow closely those instructions making standard turns first, and half standard ones when indicated.
Adopt about 90 to 110 kts IAS until you hear "Begin descent", and configure a "final" altitude then.
If you are advised "<Well/Slightly> <left/right> of course." then make "S" turns to fix that. Little ones if "Slightly", big ones if "Well".
Correct your vertical speed if you hear "<Above/Below> glidepath."
You can customize the phraseology by editing the
There you can find groups of tags like:
. . . . <foo type="string">Hello world. </foo> <foo type="string">It is a good </foo> <foo type="string">day </foo> <foo type="string">to fly. </foo> . . . .
which will be read as a single sentence ("Hello world. It is a good day to fly. ").
Those in the example above are literal sentences that you can change by the strings you want.
Strings starting by
% will call some property value.
In the example above replace
Now the sentence will be read as "Hello world. It is a good morning to fly. " or "Hello world. It is a good evening to fly. " depending on the time.
Strings starting by
~ will append the sentence with another one.
. . . . <short type="string">% /satc/callsign-fmt</short> <short type="string">, </short> <foo type="string">Have a nice fly, </foo> <foo type="string">~short</foo> . . . .
If you find that the word Wind is not pronounced clearly, you can change it by Winnded or similar to increase its intelligibility..
Better? Fine, but what about the message on the screen? Include a tag with the pattern <replace type="string">old:new</replace> :
. . . . <replace type="string">Winnded:Wind</replace> . . . .
- To implement a setting dialog (bound to the set button) allowing further customizations. (As glideslope, TTS arguments, etc.)
- To improve the terrain
getVertProfilefunctionwhen unloaded tiles are needed.
- General improvements & optimizations
Behind the scene
Supporting all the graphic work:
( to be continued ... )