A control surface drive system having a plurality of actuator assemblies
are coupled to first and second supply lines and to a return line. The
first and second supply lines are connected to a source of hydraulic
fluid. At least one of the actuator assemblies has a hydraulic actuator
movably connectable to an aircraft control surface. A flow control
assembly is connected to the return line and to at least one of the first
and second supply lines. A bypass line is in fluid communication with the
first and second supply lines and positioned to recycle the hydraulic
fluid from one of the first and second supply lines back into the other
one of the first and second supply lines when the hydraulic actuator
moves toward the first position. A computer controller operatively
interconnects the plurality of actuator assemblies and the flow control
assembly. It is emphasized that this abstract is provided to comply with
the rules requiring an abstract. It is submitted with the understanding
that it will not be used to interpret or limit the scope or meaning of
the claims(37 C.F.R. .sctn. 1.72(b)).