Estimation of Aerodynamic Derivatives and Drag Polars from LCA-TDI(SG) Flight Test Data

Parameswaran, V and Jatinder, Singh and Basappa, - and Raol, JR (2004) Estimation of Aerodynamic Derivatives and Drag Polars from LCA-TDI(SG) Flight Test Data. Technical Report. NAL, Bangalore.

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    Abstract

    Stabilized Output Error Method (SOEM) Is Applied To LCA-TD1 (SG) Flight Test Data And Aircraft Aerodynamic Derivatives Are Estimated For Zero Slat,U/C Up And Clean Configurations. The Results Presented In Chapter 1 Of The Report Show That The Pitch Damping In Flight Is Lower Than That Predicted By NDLM Values And There Is A Noticeable Reduction In The Flight Determined Derivative C„Fla (And Hence, Weathercock Stability) And C15 (Aileron Control Effectiveness).In Chapter 2, The Performance Maneuver Data Generated During The LCA-TD1 (SG) Flight Tests At Subsonic Speeds Have Been Analyzed . The Flight Determined Drag Of LCA Is Found To Be Lower Than The Drag Obtained From Reference Aerodata.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Flight Data; Stability and Control Derivatives; Estimation; SOEM Drag Polar; Linear Model Vlaues; Model Validation.
    Subjects: ASTRONAUTICS > Astronautics (General)
    Division/Department: Flight Mechanics and Control Division, Flight Mechanics and Control Division, Flight Mechanics and Control Division, Flight Mechanics and Control Division
    Depositing User: M/S ICAST NAL
    Date Deposited: 06 Aug 2012 10:33
    Last Modified: 06 Aug 2012 10:33
    URI: http://nal-ir.nal.res.in/id/eprint/10710

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