An invulnerable to weapons option.

[FlankerKiller]

As it says above. For training it would be nice to be able to set the jet to be invulnerable to weapons. But still be able to crash or damage the jet on landing or through overG/over speed. Think of how cool it would be with the new two seat F1. 

[SharpeXB]

Already an option. Just go to Gameplay / Options and select Immortal. I think you can still crash.