[Solved] Mixing Rudder and a Single Lever Brake input to give Differential Braking

[Originally posted in old support forums by Sandy R]

I have a Spitfire cockpit with authentic style control inputs. A real Spitfire does not have toe brakes but has a single lever on the control column for the brakes. A pneumatic valve configuration operated through the Rudder control allows this single lever to actuate the left and right wheel brakes independently/differentially. 

For those with a single brake lever like mine, the following LUA script simulated this facility in the MSFS spitfires by mixing the analog Rudder input with another single analog Brake input to provide standard MSFS Toe Brake outputs. 

I have successfully tested following LUA file originally written for me by John Dowson with the Flying Iron Mk IX and the Airplane Heaven Mk1a Spitfire models for MSFS. 

The file should be placed in the FSUIPC7 folder and the lines: 

[Auto]
1=Lua spitfireBrake added to the end of the FSUIPC7.ini file

or add 1=Lua spitfireBrake in the [Auto.xxx] section (where xxx is the name of your spitfire profile).

You also then need to assign both your rudder and brake lever axis in FSUIPC7 using Send to FSUIPC Offset with Offset Dword Set. The script uses offset 0xA000 for the rudder axis and 0xA004 for the brake lever axis - use these or update the script to the ones that you use.

If your rudder and/or brake axis are reversed, you can also adjust for this by setting the rudderAxisReversed and/or brakeAxisReversed variables to true (near the top of the script).