Traditionally pilot’s efforts were directly applied on control surfaces like aileron, elevator and rudder bysystem of cables, cranks, pulleys, etc. However the power required for surface control in high speed, military aircraftfar exceeds the pilot’s capabilities. Hydraulically powered control surfaces help to overcome limitations of mechanicalsystem like complexity and weight of mechanical systems . In hydraulic flight control systems the aircraft’s size andperformance are limited by economics rather than a pilot’s muscular strength. Modern high speed and performancepiloted aircrafts uses electrical flight control systems (Fly-by-wire) to control the forces on control surfaces of flight.Since fly by wire system gives no feel to the pilot on control stick , an artificial feel unit is to be designed to give feelforce to the pilot. Feel unit is an important part of control stick which provides force field to pilot proportional to theloads of the control surfaces