I don’t know if it helps but the super cheap flysky rc system (common budget option on rc aircraft) has failsafe functionality built in. You configure which out

I don’t know if it helps but the super cheap flysky rc system (common budget option on rc aircraft) has failsafe functionality built in. You configure which outputs should be in which state during failsafe and it can be triggered by being out of rc range (i.e. experiencing unexpected interferance) or by toggling a switch to select failsafe deliberately.