External Displays for Learjet

What is this?

External Displays are stand-alone applications that run separately from Flight Simulator (FSX or FS2004). These External Displays for Learjet have been designed to reproduce the flight displays of the Learjet 45, which has 2 main displays:

In order to communicate with Flight SImulator, External Displays use FSUIPC, which provides all the necessary information for the displays, except the flight plan. This is why a registered version of FSUIPC is required. Using FSUIPC, the External DIsplays can run on several machines, in which case a registered version of WideFS is required.

In order to display flight plan information (especially for the navigation display), a data communication module is provided with the External Displays. This module is installed on the PC that runs Flight Simulator and provides the flight plan information that FSUIPC does not provide.

External PFD

Primary Flight Display (PFD) running as a stand-alone application
External MFD
Multi-Function Display (MFD) displays navigation or engine information,
depending on the display mode


The installation is in 2 phases:

Installation of the Communication Module:

  1. As explained above, the Communication Module is designed to provide flight plan information for the displays. This Communication Module has its own installer for FSX and FS2004, that must be run on the PC that runs Flight Simulator. This is very important if you have several machines on your network and plan to run External Displays on multiple machines. When you are asked for a installation directory, enter the Flight Simulator installation path (it should appear automatically).
    Please note the COmmunication Module is not exactly the same for FSX and FS2004. This is why 2 installers are provided: 1 for FSX and 1 for FS2004. Install the one you need according to the version you use.
    In fact, the installation of this module is not really mandatory. But if this module is not installed, the flight plan information will not appear on any External Display.
  2. The External Displays for Learjet are packaged in a single installer. You just have to run it and follow the instructions, it is very straightforward. This installation path is not important, you can install the External Displays applications wherever you want.

As soon as installation is finished, you can run the External Displays from the WIndows Start menu using the following path:
Windows Start > All Programs > SimScape > External Displays > Learjet


When you first run the displays, they are not registered and can work for 10 minutes (free trial period).

Use the Register function of the File menu to register the key you have received from SimScape. A message window should confirm it when successful and 'REGISTERED" then appears in the window title bar.


Menu Bar

All he displays have the same menu bar, detailed here:

Keyboard Shortcuts

The following shortcuts are available for quick access to common features:


Some External Display features are managed through FSUIPC offsets. This is very convenient (especially for cockpit builders) because you can easily associate any key, joystick button or cockpit specific device to the appropriate offset to control the External Displays. The list of available offsets is provided below.

An additional application called External Display Controller is provided in the package. It lets you see the offsets used for each feature and lets you control them through a graphical interface.

The simple boxes are on/off features (grey is off, green is on). The other boxes, with a + and - minus box on the side, control values that yo ucna change by pressing the +/- boxes or by rolling the mouse wheel into the main box.

Offset List

66C4BYTE (1)R/WUnit system used for weights and pressures:
0: Imperial system
1: Metric system
66C8BYTE (1)R/WVisibility of the VOR1 needle (should not be useful for the Learjet displays)
66C9BYTE (1)R/WVisibility of the VOR2 needle (should not be useful for the Learjet displays)
66CABYTE (1)R/WVisibility of the OBI needle (not used in the Learjet displays)
66CBBYTE (1)R/WVisibility of the ADF needle
66CCBYTE (1)R/WBarometric format:
0: hectoPascals (hPa) or Millibars, mainly used in Europe
1: Inches of mercury (InHg), mainly used in the USA
66CDBYTE (1)R/WStandard barometric setting, to be used above the transition altitude (29.92 InHg or 1013.25 hPa)
66CEBYTE (1)R/WVisibility of the flight plan route on the navigation display
66CFBYTE (1)R/WVisibility of the range circles (aka "range rings") on the navigation display. For optimal realism, this should not be changed for the Learjet displays.
66D0BYTE (1)R/WNavigation Display (ND) mode:
0: ARC mode
1: ROSE mode
2: PLAN mode
66D1BYTE (1)R/WNavigation Display range, from 0 to 5 for range from 10 to 320 NM
66D2BYTE (1)R/WPrimary Flight Display brightness in percent, from 0 (dark) to 150 (extra-bright). Normal brightness is 100%.
66D3BYTE (1)R/WNavigation Display brightness in percent, from 0 (dark) to 150 (extra-bright). Normal brightness is 100%.
Not used for the Learjet displays.
66D4BYTE (1)R/WEICAS Display brightness in percent, from 0 (dark) to 150 (extra-bright). Normal brightness is 100%.
Not used for the Learjet displays.
66D5BYTE (1)R/WMulti-Function Display brightness in percent, from 0 (dark) to 150 (extra-bright). Normal brightness is 100%.
66DABYTE (1)R/WMutli-Function Display mode:
0: Displays navigation information
1: Displays engine and system information