OTXSIM - a simulator for debugging setups

Last updated 05 May 2020 - Mike Shellim


OTXSIM is a telemetry script for testing out complex mixing schemes. It's intended for use with the Companion simulator. This means that both development and basic testing can be done on a PC - no need to assemble the model. A key feature is the ability to alter GVAR values and see the effects in real time.


Auto configuration

At startup, control surfaces are assigned by looking at the channel names and making an informed guess. For example, a channel name containing 'v' and 'r' is mapped to the right V-tail panel. Mappings can also be changed in the configuration screen.

Main screen

Download script

OTXSIM version 1.2 (5 May 2020)

For Companion 2.2 and higher, with X9D profile


Copying the script (once only)

  1. Download the script, and change the file extension from '.txt' to '.lua'
  2. Copy the script file into the \SCRIPTS\TELEMETRY folder of the SD Structure path (specified in Companion settings).

Installing the script in the target model (once only)

  1. Open the .otx file in Companion, using a profile for X9D/X9D+
  2. Select the target model
  3. In the Telemetry menu, scroll to bottom, set the first screen to 'script' + otxsim
  4. Save the .otx file

Running OTXSIM

  1. In Companion, start the sim for the target model
  2. Press {long PAGE} from splash screen

Sim buttons/computer keys

Mixer conventions

The following convention is used by default:

Configuration page

Surfaces can be re-assigned and reversed in the Configuration page:

Flying notes

OTXSIM is designed as a developement tool only. Remember to remove it from the final setup before flying.