Prop blur

Prop blur is necessary to add some drama to a photo. If you click the link, you can see a version of the cover photo shot at 1/1000th of a second. The cover is shot at 1/125th of a second. The slower shutter speed leads to a more dynamic photo if you compare the two.

When photographing aircraft with propellers the slower the shutter speed is, the more motion is in the propeller arc.

https://flic.kr/p/Tc9cWB