How much damage can a tiny drone propeller really do when it comes up agains something as solid as a person? That's the question Aalborg University in Denmark is answering with a rig that can ram a spinning drone propeller into a piece of flesh at 33mph... and record the results in slow motion.
If you've ever photographed spinning airplane propeller or helicopter rotor blades with your smartphone, you may have found that the spinning blades were turned into bizarre shapes in the resulting photo. What you're seeing is distortion caused by a rolling shutter, when a CMOS sensor captures a scene by scanning across it very quickly rather than capturing the entire frame at once.
You’ve probably seen videos showing the rolling shutter effect turning airplane …