This is most noticeable when flying on RAT or with wind milling engines Quantitative hydraulic model considering the maximum hydraulic flows of the different pumps as a function of engine speed.This gives realistic surface floating angles if a control surface is lost due to combinations of hydraulic and computer faults. Hydraulic model for flight control actuators computing hydraulic flow through the actuators, the control surface hinge moment, maximum feasible deflection etc.Fly-by-wire system with reversion between normal law and alternate law 1, alternate law 2 and direct law as per real life logics.
