A flight control system for an unmanned aerial vehicle in the form of a helicopter comprising a swashplate having first (166, 168), second (166, 168), and third connection portions; a first control assembly (182A, 182B) connected to the first connection portion (166, 168) of the swashplate and having two or more servo-actuators (184A, 188A, 184B, 188B) connected to operate with each other, wherein; a second control assembly (182A, 182B) connected to the second connection portion (166, 168) of the swashplate; and a third control assembly connected to the third connection portion of the swashplate, wherein the two or more servo-actuators (184A, 188A, 184B, 188B) include a first servo-actuator (184A, 188A) having a first servo arm (186A, 186B), a second servo-actuator (184B, 188B) having a second servo arm (190A, 190B), and a linkage member (192A, 192B) connecting the second servo arm (190A, 190B) to the first servo arm (186A, 186B); wherein the second servo arm (190A, 190B) is directly connected to the first connection portion (166, 168) of the swashplate or, optionally, a linkage assembly (198A, 198B) is connected between the second servo arm (190A, 190B) and the first connection portion (166, 168) of the swashplate; the linkage member (192A, 192B) is a rigid member (192A, 192B) pivotably attached to each of and between the first servo arm (186A, 186B) and the second servo arm (190A, 190B); and the first servo arm (186A, 186B) and the second servo arm (190A, 190B) are configured to rotate in unison to move the first connection portion (166, 168) to control the swashplate; the second control assembly (182A, 182B) comprises a first servo-actuator (184A, 188A, 184B, 188B) having a first servo arm (186A, 190A, 186B, 190B), a second servo-actuator (184A, 188A, 184B, 188B) having a second servo arm (186A, 190A, 186B, 190B), and a linkage member (192A, 192B) connecting the second servo arm (186A, 190A, 186B, 190B) to the first servo arm (186A, 190A, 186B, 190B); and a linkage assembly (198A, 198B) connected to the second servo arm (186A, 190A, 186B, 190B) and to the second connection portion (166, 168) of the swashplate; and the third control assembly comprises a first servo-actuator (184C, 188C) having a first servo arm (186C, 190C), a second servo-actuator (184C, 188C) arranged opposite the first servo-actuator (184C, 188C) and having a second servo arm (186C, 190C), and a linkage assembly connected to the first (186C, 190C) and second (186C, 190C) servo arms and to the third connection portion of the swashplate. a swashplate having first (166, 168), second (166, 168), and third connection portions; a first control assembly (182A, 182B) connected to the first connection portion (166, 168) of the swashplate and having two or more servo-actuators (184A, 188A, 184B, 188B) connected to operate with each other, wherein; a second control assembly (182A, 182B) connected to the second connection portion (166, 168) of the swashplate; and a third control assembly connected to the third connection portion of the swashplate, wherein the two or more servo-actuators (184A, 188A, 184B, 188B) include a first servo-actuator (184A, 188A) having a first servo arm (186A, 186B), a second servo-actuator (184B, 188B) having a second servo arm (190A, 190B), and a linkage member (192A, 192B) connecting the second servo arm (190A, 190B) to the first servo arm (186A, 186B); wherein the second servo arm (190A, 190B) is directly connected to the first connection portion (166, 168) of the swashplate or, optionally, a linkage assembly (198A, 198B) is connected between the second servo arm (190A, 190B) and the first connection portion (166, 168) of the swashplate; the linkage member (192A, 192B) is a rigid member (192A, 192B) pivotably attached to each of and between the first servo arm (186A, 186B) and the second servo arm (190A, 190B); and the first servo arm (186A, 186B) and the second servo arm (190A, 190B) are configured to rotate in unison to move the first connection portion (166, 168) to control the swashplate; the second control assembly (182A, 182B) comprises a first servo-actuator (184A, 188A, 184B, 188B) having a first servo arm (186A, 190A, 186B, 190B), a second servo-actuator (184A, 188A, 184B, 188B) having a second servo arm (186A, 190A, 186B, 190B), and a linkage member (192A, 192B) connecting the second servo arm (186A, 190A, 186B, 190B) to the first servo arm (186A, 190A, 186B, 190B); and a linkage assembly (198A, 198B) connected to the second servo arm (186A, 190A, 186B, 190B) and to the second connection portion (166, 168) of the swashplate; and the third control assembly comprises a first servo-actuator (184C, 188C) having a first servo arm (186C, 190C), a second servo-actuator (184C, 188C) arranged opposite the first servo-actuator (184C, 188C) and having a second servo arm (186C, 190C), and a linkage assembly connected to the first (186C, 190C) and second (186C, 190C) servo arms and to the third connection portion of the swashplate.