Optimum flap schedules and minimum drag envelopes for combat aircraft | Zendy

B. Rajeswari | Zendy; K. R. Prabhu | Zendy

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Optimum flap schedules and minimum drag envelopes for combat aircraft

Author(s) -

B. Rajeswari,

K. R. Prabhu

Publication year - 1987

Publication title -

journal of aircraft

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.64

H-Index - 94

eISSN - 1533-3868

pISSN - 0021-8669

DOI - 10.2514/3.45461

Subject(s) - trailing edge , deflection (physics) , mach number , leading edge , takeoff and landing , aerodynamics , drag , takeoff , wing , swept wing , wind tunnel , aerospace engineering , angle of attack , structural engineering , engineering , computer science , physics , optics

Wing leading - and trailing-edge flaps are usually deployed13; to improve the lifting ability of wings, especially13; during takeoff and landing. In recent times, however, these13; flaps have been used also during maneuver conditions to im-13; prove the aerodynamic efficiency (LID). Some examples of13; aircraft usingsuch devices are F-4E, F-5E, F-16, F- 18, etc. During a maneuver, the flaps automatica!ly follow a predetermined deflection schedule which is a function of Mach number and angle of attack. The flap deflection schedule is mainly determined through extensive wind-tunnel tests. 13; In this paper, a simple analytical method based on linear theory is developed to determine the optimum flap schedule13; for both leading and trailing edge flaps.

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