Due to the J-10's aerodynamically unstable design, a digital quadruplex-redundant fly-by-wire (FBW) flight control system (FCS) aids the pilot in flying the aircraft. The FCS typically monitors pilot control inputs, preventing the pilot from accidentally exiting the flight envelope from applying too much control input during high performance flight situations. This is critical in canard wing aircraft, as they are capable of turning in a much tighter radius than conventional aircraft. The massive control surfaces are capable of moving so far that they can completely destroy the aircraft in flight at high airspeeds if not kept in check by the FCS.