PAR instrument: Difference between revisions

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= How to use it =
= How to use it =
When you are about 15 or 20 miles from your destination, tune Comm1 to an available ATC frequency (you can find them at ''Menu/Location/Airfield information'' or at the {{key press|F12}} dialog).<br />
Press the {{key press|>}} key to see the PAR instrument (you can open as many as you want). Verify the airport and runway destination.<br />
On the screen you should see not only your plane but all the flying MP/AI in range. Adjust Zoom if necessary.<br />
Click the {{key press|GCA}} button to  request GCA assistance.<br />
You will hear the GCA's answer ''"<callsign>, this will be a PAR approach to <airport> runway <rwy>."''<br />
Now, as you do not want to cheat, you should click the {{key press|hide}} button. (Remember: this PAR is a ground instrument, not a flying one).<br />
But not worry, once you have landed (or anytime, indeed) you can press the {{key press|>}} key again to visualize and analyze your plotted trajectory. <br />
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.<br />
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" atitude then.<br />
If you are adviced ''"<Well/Slightly> <left/right> of course."'' then make "S" turns to fix that. Little ones if "Slightly", big ones if "Well".<br />
Correct your vertical speed if you hear ''"<Above/Below> glidepath."''
<br />

Revision as of 20:02, 22 February 2018

Precision Approach Radar screen

Precision Approach Radar (PAR) is a ground instrument conceived primarily to provide the GCA service.

WIP.png 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 history for the latest developments.

PAR allows the Ground Controlled Approach (GCA) controller to deliver approach directives to the requesting aircraft.
(see Howto:Implementing_a_simple_GCA_system)

Background

Cquote1.png 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.
— Alant (Sun Ago 13). Re: Spoken ATC.
(powered by Instant-Cquotes)
Cquote2.png

What GCA is

What can you expect from GCA

Horizontal trajectory when pilot follows GCA instructions

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.

Vertical trajectory when pilot follows GCA instructions





How to install

{{note | This is the latest version (Feb 22, 2018)
If your FGFS version accepts Addons, you can download this feature from the Addons Repository. Download all the 12 files into the directory of your choice.

Launch FlightGear including --addon argument, eg.:

 fgfs <usual args> --addon=/path/to/PARaddon/
Note  From version 2017.4.0, the FG launcher accepts the --addon option in his Settings/Additional Settings tab.

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 Comm1 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" atitude then.
If you are adviced "<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."