Question

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Answer 1

Answer:

For hovering flight you'll need to ensure adequate control in yaw, pitch and roll. Pitch can be controlled using cyclic, or by control surfaces in the rotor's slipstream - e.g. wing's elevons. Roll can be controlled using some kind of differential thrust - rotor collective or motor power control. Yaw control could be implemented using torque differential between rotors, they need to rotate in opposite directions as Mohamad Afifi mentioned.