Accession Number : AD0779928

Title :   Identification and Correlation of the F-4E Stall/Post-Stall Aerodynamic Stability and Control Characteristics from Existing Test Data.

Descriptive Note : Final rept. Mar 72-Jun 73,

Corporate Author : CALSPAN CORP BUFFALO N Y

Personal Author(s) : Eulrich,Bernard J. ; Weingarten,Norman C.

Report Date : AUG 1973

Pagination or Media Count : 345

Abstract : The report documents the results of a study performed for the United States Air Force Flight Dynamics Laboratory to identify the high angle of attack post stall aerodynamic stability and control characteristics of the F-4 aircraft from existing full scale and radio-controlled drop model test data and to correlate these results with similar characteristics obtained from wind tunnel tests. A parameter identification procedure was set up to extract these nonlinear characteristics from flight test records using a nonlinear iterated Kalman filter/fixed-point smoother algorithm and a least square equation error method. Model form is established from wind tunnel data by representing the aerodynamic coefficients by Taylor's series expansions for selected ranges of angle of attack. (Modified author abstract)

Descriptors :   *JET FIGHTERS, *AERODYNAMIC STABILITY, STALLING, ANGLE OF ATTACK, AERODYNAMIC CHARACTERISTICS, KALMAN FILTERING, WIND TUNNEL MODELS

Subject Categories : Aerodynamics
      Attack and Fighter Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE