A SIMULATOR INVESTIGATION OF THE INFLUENCE OF ENGINE RESPONSE CHARACTERISTICS ON THE APPROACH AND LANDING FOR AN EXTERNALLY BLOWN FLAP AIRCRAFT Part 2:Aerodynamic Model

摘要

Investigation of the influence of engine response characteristics on approach and landing operations of a powered 1ift aircraft were carried out 1n a piloted ground-based simulation at the Ames Research Center. The aircraft simulated was a four engine, externally-blown Jet-flap configuration having an 80 pound wing loading and .56 thrust to weight ratio. Normal four-engine approaches and landings as well as wave-offs and landings following a single outboard engine failure were evaluated. Three engine models were investigated, ranging from a rapid responding variable pitch fan or variable inlet guide vane configuration to a more slowly responding fixed geometry configuration Results indicate that for ideal operating conditions and minimal pilot reaction delay, substantial reductions in engine-out wave-off altitude increment and touchdown sink rate for engine-out landings can be achieved with the fast engine compared to the slow engine response.