catadar walker battle
Lavonda Busing
For gazebo iris, it load first default copter param and them gazebo one.
Those parameters are store in SITL instance eeprom.bin that you should find in the directory where you launch the sim_vehicle. py script ( yes that is just an usefull launcher for SITL and not SITL).
When you change the parameters from mavproxy, only those on eeprom are changed. And will be keep across SITL reboot.
If you want to save your param file you need to save it with something like param save. (or copy the mav.param file that mavproxy already create near eeprom.bin). Sim_vehicle.py get a command to load a new param file at start.
To erase the param change and revert back to the defaults from first launch, append -w when using sim_vehicle.py (like explain in the wiki).