How many fps is that?
How many fps is that?
It depends upon the size of the drone. I read many years ago that a normal person, with a little practice, can track a bullet that is going just under 1000 ft per second (FPS) if it is fired into the sky. I tried this while shooting 45 ACP at about 900 FPS and after a few rounds I could could track the bullet for a while. But I was much younger and my eyes were much better. Having said that, I have also seen a jet fly at twice the speed of sound and I was easily able to track it. OBTW the speed of sound is 1125 FPS.
The human eye has remarkably good depth perception for retreating objects. For advancing objects and crossing objects not so much. This effect is easily tested the average person can see a subsonic 45 cap round fired away from them down range against a white background. The same person would be hard pressed to see the same round fired at them even if just off center enough not to hit tham. The human eye has zero probability of seeing a 45 round crossing left to right in front of them. We used to shoot MK19 round about the size of a fist at 850 fps down range towards APC sized targets 1000 yards away you could visually track the rounds all the way to target. If they drones are bird sized at any speed above 500 fps they would be at best blurs when approaching and a human would have zero chance of dodging one heading right for them whole actively maneuvering under computer control.