A limited evaluation of the F/A-18 baseline loads model was performed on the Systems Research Aircraft at NASA Dryden Flight Research Center (Edwards, California). Boeing developed the F/A-18 loads model using a linear aeroelastic analysis in conjunction with a flight simulator to determine loads at discrete locations on the aircraft. This experiment was designed so that analysis of doublets could be used to establish aircraft aerodynamic and loads response at 20 flight conditions. Instrumentation on the right outboard leading edge flap, left aileron, and left stabilator measured the hinge moment so that comparisons could be made between in-flight-measured hinge moments and loads model-predicted values at these locations. Comparisons showed that the difference between the loads model-predicted and in-flight-measured hinge moments was up to 130 percent of the flight limit load. A stepwise regression technique was used to determine new loads derivatives. These derivatives were placed in the loads model, which reduced the error to within 10 percent of the flight limit load. This paper discusses the flight test methodology, a process for determining loads coefficients, and the direct comparisons of predicted and measured hinge moments and loads coefficients.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    An Evaluation Technique for an F/A-18 Aircraft Loads Model Using F/A-18 Systems Research Aircraft Flight Data


    Contributors:

    Conference:

    31st SFTE Annual Symposium 2000 ; 2000 ; Torino, Italy


    Publication date :

    2000-07-01


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English





    Structural Flight Loads Data from C-130E Aircraft

    L. E. Clay / W. W. Morton | NTIS | 1965


    Structural Flight Loads Data from C-130 Aircraft

    L. E. Clay / A. P. Berens | NTIS | 1964


    Accelerometers for determining aircraft flight loads

    Taylor, J. | Engineering Index Backfile | 1952


    General Aviation Aircraft Empennage Flight Loads

    Kim, D. / SAE | British Library Conference Proceedings | 1999