Transcription of Chapter 11 Transition to Complex Airplanes
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11-1 IntroductionA high-performance airplane is defined as an airplane with an engine capable of developing more than 200 horsepower. A Complex airplane is an airplane that has a retractable landing gear, flaps, and a controllable pitch propeller. In lieu of a controllable pitch propeller, the aircraft could also have an engine control system consisting of a digital computer and associated accessories for controlling the engine and the propeller. A seaplane would still be considered Complex if it meets the description above except for having floats instead of a retractable landing gear to Complex Airplanes Chapter 1111-2 Figure 11-2. Coefficient of lift comparison for flap extended and retracted with flap extendedAngle of attack CLCL, max flappedCL, max normalStalled airfoilNormal airfoilSimple flapped airfoilMean camber lineIncreased camberFigure 11-1.
with power to offset the drag produced by the flaps, the landing flare becomes critical. The drag produces a high sink rate that must be controlled with power, yet failure to reduce power at a rate so that the power is idle at touchdown allows the airplane to float down the runway. A reduction in power too early can
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