The sound of propwash (Quadcopter FPV Racing Drone 4S Emax RS2205S)01:08

Propwash
Airflow distortion due the thrust of the propellers can’t flow downward because the centrifugal force which arises while doing such a high speed looping (high G) causes the airflow to be pushed back in the opposite direction.

    1. Julius Salovaara

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