Chapter 11 Transition to Complex Airplanes
Chapter 11 Transition to Complex Airplanes Introduction A 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 system. 11-1 i ii Tapered Delta Sweptback Figure 11-1. Airfoil types. Transition to a complex airplane, or a high-performance axis. Wing flaps acts symmetrically about the longitudinal airplane, can be demanding for most pilots without previous axis producing no rolling moment; however, both lift and drag experience. Increased performance and complexity both increase as well as a pitching moment about the lateral axis. require additional planning, judgment, and piloting skills. Lift is a function of several variables including air density, Transition to these types of airplanes, therefore, should be velocity, surface area, and lift coefficient. Since flaps increase accomplished in a systematic manner through a structured an airfoil’s lift coefficient, lift is increased. [Figure 11-3] course of training administered by a qualified flight instructor. As flaps are deflected, the aircraft may pitch nose up, nose Airplanes can be designed to fly through a wide range of down or have minimal changes in pitch attitude. Pitching airspeeds. High speed flight requires smaller wing areas and moment is caused by the rearward movement of the moderately cambered airfoils whereas low speed flight is wing’s center of pressure; however, that pitching behavior obtained with airfoils with a greater camber and larger wing depends on several variables including flap type, wing area.
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