Chapter 6

6.4  Aerodynamic hazards

As we explained earlier on in this chapter, an UAS is able to fly on the basis of several aerodynamic principles. However, there are also certain aerodynamic hazards, two of which are particularly dangerous UAS with rotors.


Downwash is a phenomenon that occurs while an UAS is hovering and the rotors generate a downward air current. This air current can suck up sand, dirt and other light objects and potentially damage the motor.

Vortex ring single rotor



See chapter 6.11 for a summary.

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