The behavior of very large aircraft disturbed by wind shear and atmospheric turbulence (vertical gust during the landing approach) is analyzed by means of a multiloop system. The aircraft considered were a B-747-like aircraft and two hypothetical aircraft, the VLAC-1A and The VLAC-4A, with weights ranging from 500,000 to 4,000.000 lbs. A combined system, consisting of an autothrottle to control airspeed and a human pilot model to control altitude, was developed. It was shown that because of the decreasing value of short period value with increasing aircraft weight, a larger value of the lead time constant is needed for the larger aircraft resulting in a worse pilot rating. Results indicated that due to higher approach speeds of the larger aircraft, a higher percentage of the available thrust will be needed to cope with a given wind shear. Increased engine response lag can deteriorate altitude control.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Behavior of Very Large Aircraft Disturbed by Wind Shear and Atmospheric Turbulence


    Contributors:

    Publication date :

    1972


    Size :

    61 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Large Eddy Simulations of Aircraft Wake Vortices: Atmospheric Turbulence Effects

    Han, J. / Lin, Y. / Arya, S. et al. | British Library Conference Proceedings | 1997



    Atmospheric turbulence encountered by Hermes aircraft

    Heath-Smith, J. R. / Aeronautical Research Council | TIBKAT | 1957


    Wind Shear and Turbulence Simulation

    R. L. Bowles | NTIS | 1987