here is a crazy idea.
why not rig up a Ec145, a R22, R44 for remote controlled flight and fly them in to a DJi and see what the results are, that way we will know for sure what the results will be.
I'm using them for example but it any other helicopters.
have one drone flying in to the blades and on a different heli have it fly head on.
It's the only way that this could be resolved.
fats