Early silent films had a frame rate from 14 to 24 FPS but by using projectors with dual-and triple-blade shutters the rate was multiplied two or three times as seen by the audience.
Early silent films had a frame rate from 14 to 24 FPS which was enough for the sense of motion, but it was perceived as jerky motion. By using projectors with dual-and triple-blade shutters the rate was multiplied two or three times as seen by the audience.