Re: Chicken cannon
'The computer simulations of the collisions themselves were validated by dropping the real-world drones from various heights, with the resulting smashes filmed on high-speed cameras and compared to simulator predictions.'
I'm not convinced this is as effective a verification of the simulation as firing the drones at representative speed from a cannon. By rough calculation* I make it an 850m free fall to hit 250kts (463kph), which I suspect they didn't do. So they could only realistically be verifying the low speed simulations.
*i.e. ignoring drag and whatever the terminal velocity of the drone is.