Science @ScienceGuys_ When the rotation speed of the helicopter propeller matches the number of images per second (fps speed) of the camera 🚁 pic.twitter.com/s6sij32ejB 2023-10-22 21:29:33 Hicham Mounadi @h_mounadi The spin of the helicopter’s 🚁 blades is measured by “Rev Per Minute” [RPM] which is known as “Revolution Per Minute”, is essential for helicopters to produce enough upthrust in the a