An unmanned aerial vehicle, UAV, (100, 200, 300, 400), comprising: a frame (104,204, 304, 404, 604); two motor arms(105-1, 105-2) mounted to the frame; a plurality of lifting motors and corresponding lifting propellers mounted to respective ends of the motor arms, wherein the lifting motors are orientated to provide a vertical lift to the UAV when the lifting propellers are rotated by the lifting motors; a pivot assembly (107, 607) coupled to the frame, the pivot assembly comprising: a pivot arm configured to rotate about an axis; a first motor coupled to the pivot arm and disposed at a first position with respect to the pivot arm; a second motor coupled to the pivot arm and disposed at a second position with respect to the pivot arm, wherein the first motor and the second motor are offset with respect to one another; a first mechanical stop that inhibits a rotation of the pivot arm in a first direction about the axis; a second mechanical stop that inhibits the rotation of the pivot arm in a second direction about the axis; wherein: when a first force generated by the first motor exceeds a second force generated by the second motor, rotation of the pivot arm in the first direction is inhibited by the first mechanical stop; and when the second force generated by the second motor exceeds the first force generated by the first motor, rotation of the pivot arm in the second direction is inhibited by the second mechanical stop. a frame (104,204, 304, 404, 604); two motor arms(105-1, 105-2) mounted to the frame; a plurality of lifting motors and corresponding lifting propellers mounted to respective ends of the motor arms, wherein the lifting motors are orientated to provide a vertical lift to the UAV when the lifting propellers are rotated by the lifting motors; a pivot assembly (107, 607) coupled to the frame, the pivot assembly comprising: a pivot arm configured to rotate about an axis; a first motor coupled to the pivot arm and disposed at a first position with respect to the pivot arm; a second motor coupled to the pivot arm and disposed at a second position with respect to the pivot arm, wherein the first motor and the second motor are offset with respect to one another; a first mechanical stop that inhibits a rotation of the pivot arm in a first direction about the axis; a second mechanical stop that inhibits the rotation of the pivot arm in a second direction about the axis; wherein: when a first force generated by the first motor exceeds a second force generated by the second motor, rotation of the pivot arm in the first direction is inhibited by the first mechanical stop; and when the second force generated by the second motor exceeds the first force generated by the first motor, rotation of the pivot arm in the second direction is inhibited by the second mechanical stop. a pivot arm configured to rotate about an axis; a first motor coupled to the pivot arm and disposed at a first position with respect to the pivot arm; a second motor coupled to the pivot arm and disposed at a second position with respect to the pivot arm, wherein the first motor and the second motor are offset with respect to one another; a first mechanical stop that inhibits a rotation of the pivot arm in a first direction about the axis; a second mechanical stop that inhibits the rotation of the pivot arm in a second direction about the axis; wherein: when a first force generated by the first motor exceeds a second force generated by the second motor, rotation of the pivot arm in the first direction is inhibited by the first mechanical stop; and when the second force generated by the second motor exceeds the first force generated by the first motor, rotation of the pivot arm in the second direction is inhibited by the second mechanical stop. when a first force generated by the first motor exceeds a second force generated by the second motor, rotation of the pivot arm in the first direction is inhibited by the first mechanical stop; and when the second force generated by the second motor exceeds the first force generated by the first motor, rotation of the pivot arm in the second direction is inhibited by the second mechanical stop.