Propeller of drone not rotating like original

Propeller is just rotating in normal speed and also not to fast like original.

propeller_animation.blend (1.4 MB)

It looks like you’re getting a wagon wheel effect. If needed, an internet search will tell you more about what that is.

Motion blur on the propeller may help. Your blender file has motion blur enabled but as yet eevee doesn’t support motion blur on objects.