A flight control system for an unmanned aerial vehicle in the form of a helicopter comprising a swashplate having first , second , and third connection portions; a first control assembly connected to the first connection portion of the swashplate and having two or more servo-actuators connected to operate with each other, wherein; a second control assembly connected to the second connection portion of the swashplate ; and a third control assembly connected to the third connection portion of the swashplate , wherein the two or more servo-actuators include a first servo-actuator having a first servo arm , a second servo-actuator having a second servo arm , and a linkage member connecting the second servo arm to the first servo arm ; wherein the second servo arm is directly connected to the first connection portion of the swashplate or, optionally, a linkage assembly is connected between the second servo arm and the first connection portion of the swashplate ; the linkage member is a rigid member pivotably attached to each of and between the first servo arm and the second servo arm ; and the first servo arm and the second servo arm are configured to rotate in unison to move the first connection portion to control the swashplate ; the second control assembly comprises a first servo-actuator having a first servo arm , a second servo-actuator having a second servo arm , and a linkage member connecting the second servo arm to the first servo arm ; and a linkage assembly connected to the second servo arm and to the second connection portion of the swashplate ; and the third control assembly comprises a first servo-actuator having a first servo arm , a second servo-actuator arranged opposite the first servo-actuator and having a second servo arm , and a linkage assembly connected to the first and second servo arms and to the third connection portion of the swashplate . a swashplate having first , second , and third connection portions; a first control assembly connected to the first connection portion of the swashplate and having two or more servo-actuators connected to operate with each other, wherein; a second control assembly connected to the second connection portion of the swashplate ; and a third control assembly connected to the third connection portion of the swashplate , wherein the two or more servo-actuators include a first servo-actuator having a first servo arm , a second servo-actuator having a second servo arm , and a linkage member connecting the second servo arm to the first servo arm ; wherein the second servo arm is directly connected to the first connection portion of the swashplate or, optionally, a linkage assembly is connected between the second servo arm and the first connection portion of the swashplate ; the linkage member is a rigid member pivotably attached to each of and between the first servo arm and the second servo arm ; and the first servo arm and the second servo arm are configured to rotate in unison to move the first connection portion to control the swashplate ; the second control assembly comprises a first servo-actuator having a first servo arm , a second servo-actuator having a second servo arm , and a linkage member connecting the second servo arm to the first servo arm ; and a linkage assembly connected to the second servo arm and to the second connection portion of the swashplate ; and the third control assembly comprises a first servo-actuator having a first servo arm , a second servo-actuator arranged opposite the first servo-actuator and having a second servo arm , and a linkage assembly connected to the first and second servo arms and to the third connection portion of the swashplate . <EOS>