5. What is the main drawback of using Rotary-Wing UAVS? a.They have limited flight endurance and range b.They have complex systems c.They need a runway for take-off and landing d.They are difficult to build 6. Which of the following statements about Quadrotor UAVS are CORRECT? i.The common configurations of quadrotor UAVS are X' and +' configurations. ii.They have six degrees of freedom from three translational and three rotational motions. iii.We could use Left Hand Rule to determine the direction of a motion iv.They are underactuated systems. a.i, ii b.i, ii, ii c.i, ii, iv d.ii, i, iv

5. What is the main drawback of using Rotary-Wing UAVS? a.They have limited flight endurance and range b.They have complex systems c.They need a runway for take-off and landing d.They are difficult to build 6. Which of the following statements about Quadrotor UAVS are CORRECT? i.The common configurations of quadrotor UAVS are X' and +' configurations. ii.They have six degrees of freedom from three translational and three rotational motions. iii.We could use Left Hand Rule to determine the direction of a motion iv.They are underactuated systems. a.i, ii b.i, ii, ii c.i, ii, iv d.ii, i, iv