Appendix F. Using the CL software with ProSim 737.
The CL system can be used with ProSim 737 through
a combination of Heavy Jet Mode 1 to
set the behaviour of elevator axis trim, and changes to the Auto
Pilot integration settings to allow the CL software to recognise and
work with the ProSim MCP for A/P following..
Please read Appendix D
for details of Heavy Jet Mode 1. In this mode the elevator control
exhibits a single hands-off position (usually at mid), whilst CL
elevator trim adjustments drive the FSX (rather than the CL) trim
position. Trimming therefore causes the pitch attitude of the
aircraft to change whilst the elevator control can be brought back
to its hands-off position at mid.
In the aileron and rudder control axes however trim follows the
"General Aviation" feel. In this mode on trim adjustment the control
force is trimmed out to allow the axis to be made hands-off at any
position (within reason).
CL trim inputs should be active on all axes, and
FS trim inputs should be disabled on all axes.
It is also possible to use GA type trim feel on
the elevator axis - see the bottom of this page
In order to allow the CL system work with the
ProSim A/P custom FSUIPC offsets are used to communicate the A/P
status, and to send disengage commands from the CL software to
ProSim. These custom FSUIPC offsets must be configured in ProSim 737
System application. See below for details.
When A/P becomes active (ie via MCP CMD1 or CMD2)
the CL system will drive the aileron axis to follow the FS aileron
axis (as commanded by ProSim A/P). The CL elevator trim indicator
will follow FS elevator trim movement whilst the elevator stays
stationary at mid.
A default Heavy-ProSim configuration file is
provided which you can use as the start of your setup. Most settings
are already made in this file, however they are detailed below for
- Open the Configuration Manager (V1.03
or later) and load the
"Heavy ProSim" default configuration file. Go to Tab 5 and
select Item 18 (Heavy Jet Mode 1), and then click Update_Mode.
This will enable heavy jet mode 1 (Use_FSTrim=10), and make
sure pot-less mode is set.
It will also set Tab 4 Item 1 = 2 to enable A/P following
and set the A/P status offset Item 25 = 0x5300 (default).
Additionally it will set Tab 4 Item 26 = 0x53DB to set
the auto-disengage command offset, and Item 27 = 551
(default) to set the command value.
Tab 4 Items 2 & 3 will be set = 1.0 to define the
position following movement scalers. The rudder axis is not used
for A/P control in this mode.
- In ProSim configure the FSUIPC offset to
export the MCP indicator light status. This is done in the
ProSim737 System window - Menu item Config-Configuration-Tab "Inidcators
You must first enable FSUIPC Support in the ProSim "Drivers" Tab
for the offset setting option to become available.
Then in the "Indicators MCP/Throttle" Tab set
MCP CMD A to FSUIPC 8 bit U - 0x5300.1
MCP CMD B to FSUIPC 8 bit U - 0x5300.2
MCP CWS A to FSUIPC 8 bit U - 0x5300.3
MCP CWS B to FSUIPC 8 bit U - 0x5300.4
MCP FCC A Master to FSUIPC 8 bit U - 0x5300.5
MCP FCC B Master to FSUIPC 8 bit U - 0x5300.6
NB change "5300" to suit your chosen offset. If you change this
you must also change Tab 4 Item 25 to suit.
- Then configure the offset used to carry the
CL software auto A/P disengage instruction, ...in the ProSim
"Switches MCP/Throttle" Tab set....
MCP AP Disengage Disengage to
FSUPIC 16bit U 0x53DB = 551
This can be adjusted to suit your offset and value settings in
Items 26 and 27 if required.
The CL software will issue the A/P disengage command if the
pilot forces the elevator or aileron control is away from its
set point by more than the trigger distances set in Tab 4
Items 13 & 14.
- Remember to SAVE your configuration settings.
Please see the Heavy Jet
Mode 1 section for details of other settings usually made in
If the above settings are not made correctly
then the ProSim integration may not operate properly.
Using GA style trim feel:
GA style trim feel can be set on the elevator axis
rather than Heavy Jet mode type trim feel. However this will affect
the elevator control position operating range and may require larger
than usual control displacements in some circumstances. This is
because to set GA type trim feel the CL system must control trim
whilst the FS trim setting is held at a fixed value at all times
(other than during A/P control).
To configure GA mode Select Item 17 in Tab 5
and click Update Mode. This will set Item 22 = 0. Make sure that
your Tab 4 A/P settings remain the same as above to allow operation
with ProSim A/P.
Note settings Tab 4 Items 11 & 12. These
set the way in which FS elevator trim is handled on A/P disengage.
The CL software will reset FS trim to zero when A/P is disengaged to
prevent a shift in elevator axis authority. Item 11 allows a
non-zero reset position which can be used to provide a fixed shift
in elevator control range during flight.