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OZx Airfields Launcher Guide

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OZx Airfields Launcher Guide



Virtually all OZx Airstrips, like real world airstrips, don't have NDB, VORs or even ICAO codes. The pilot is expected to navigate using traditional navigation. The OZx philosophy encourages this, but it leaves it difficult to start from wherever you want as most of our airstrips do not appear in the FSX airport list.

The OZx airfield launcher is an application that has been made to help the OZx community be able to start flying from any OZx airstrip of their choice and encourage proper navigation from that point.

CASA, in their recently released "Flight Planning Kit", gives a summary of why it's never a good idea to use a GPS as a primary navigation source. An excerpt:

"Another CFI mentioned being in outback Queensland, and talking to the pilot of a light twin who had flown there from the east coast with no charts, relying on a GPS 'He was only a battery failure away from being totally lost,' the appalled instructor said.

Planning is important because it constructs a four-dimensional picture of the flight in your mind. You build the foundation of your situational awareness. To follow GPS prompts is to do exactly the opposite. Now situational awareness resides in a machine and you merely follow its directions."

The application has the functionality to provide distance/bearing information from the current aircraft position to other OZx airstrips. For information on how to navigate using distance/bearing (it's a great way to fly!), see the following link:



Just click on the link below to get the installation files. Extract the package and run the setup.exe installation program. A start menu item will be created.


The program can be removed via the Add/Remove Programs section of the Windows control panel.

Auto update

The application has auto-update functionality and will offer you the choice of updating when the time comes. There are a number of enhancements planned for the program and this will help keep the it always up-to-date.

For those who run FSX on PCs not on the internet, simply run the latest installation package to upgrade.


FSX does not need to be running to use the application. In fact, it's a good way to start FSX.


For basic usage, just select your region, airfield and hit "Go to Airfield". The application will launch FSX (if it's not already running) and put you at the selected airport, using the default Cessna 172. If you would like the program to use a different aircraft, read on!


The "Base FLT file" functionality enables the application take you to an airfield with the aircraft of your choice, also in a start-up state of your choice.

Simply load FSX in your chosen aircraft, shut the aircraft down (if you want to) and then save the flight in FSX.

Next, go to your saved flights directory. You will find this in the "My Documents\Flight Simulator X Files" folder. Find the files with the name of the saved flight you just created.

Rename the FLT file to have"OZxPresetFlight-" then a description and be sure it still ends in ".FLT". The description is what will appear in the program.

For example, your saved flights might look like this:


You can rename the other files with the same name, but different file types, but it is not required.

Once your files have been renamed, load the application and you'll find your templates in the "Base FLT file" area. The example above will show as follows:


Sim Time

This lets you choose what time the simulator will be when it loads. It defaults to today's date and the current time. Enter the text directly, or use the slider to quickly choose a time. If you would like to use the time within your base FLT file, simply choose that option.



When FSX is running the program will read your FSX location and allow you to view what airfields are nearby and their distance and bearing from your current location. The direction will take into account the magnetic variation of your current location.

Once the program establishes a connection to FSX, it will start populating values in the debug window.


The program will only allow "Order by distance" if the aircraft is stationary and on the ground. The feature is for flight planning, not navigation!

Simply choose "Order by distance" and the list will show all airfields, ordered by distance. Distance/bearing details will be shown before each Airfield in the list.

FPS Limiter

The program can also start FSX using FPS Limiter. To configure FPS Limiter, click on the "Change settings" button:


The settings screen gives all options used to launch FPS Limiter. You can also download FPS Limiter by clicking the "Get FPS Limiter here" link.


Once everything is set, be sure the "Use FPS Limiter" button is set and launch your favourite airfield as normal.


FPS Limiter functionality doesn't work

For this to work, FSX must be launched from within the application.

There is no information about the strips

This is being populated for the next major release. There are 2 airfields that are populated. Watts Bridge and Caboolture.

I get the following error when I start the application

(the words might be slightly different, but has error 0x8007007E)

 (Exception de HRESULT: 0x8007007E)

OZxAirfieldLauncher.OZxAirfieldLauncher.DefWndProc(Message& m) at

System.Windows.Forms.Control.WndProc(Message& m)   at

System.Windows.Forms.ScrollableControl.WndProc(Message& m) at

System.Windows.Forms.ContainerControl.WndProc(Message& m) at 

System.Windows.Forms.Form.WndProc(Message& m)   at

System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)   at

System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at

System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

OZx Airfield Launcher

This is caused by Simconnect not being properly installed. Click on the link below to download and install Simconnect.


Can I run it on a networked PC?

Not at the moment, and there are no plans to add this functionality. Let us know if you would like it.

Help! I've having a problem!

Please post in the OZx Support Forum and we'll help you out.


Acknowledgments and license info:

  • Contains implementations of formula taken from "Aviation Formulary V1.45" By Ed Williams. (http://williams.best....net/avform.htm)
  • Contains converted implementations of formula taken from Magfield.java (used to calculated magnetic variation) by Ed Williams.
  • Airfield startpoint data supplied by Bliksimpie.

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