An engine's RPM (revolutions per minute) measures how often the crankshaft rotates in a minute, indicating speed. Combustion drives pistons, spinning the crankshaft. Sensors track these rotations, revealing higher RPMs as the engine works harder or produces more power! . Credit: unknown All rights and credits reserved to the respective owners. This video is for educational purposes only. Dm for Removal . I promise you won't regret following us @explaining.astrophysics ❤ #engine #physics #knowled