A free-to-roll study of the low-speed lateral characteristics of the pre-production F/A-18E was conducted in the NASA Langley 12-Foot Low-Speed Tunnel. In developmental flight tests the F/A-18E unexpectedly experienced uncommanded lateral motions in the power approach configuration. The objective of this study was to determine the feasibility of using the free-to-roll technique for the detection of uncommanded lateral motions for the pre-production F/A-18E in the power approach configuration. The data revealed that this technique in conjunction with static data revealed insight into the cause of the lateral motions. The free-to-roll technique identified uncommanded lateral motions at the same angle-of-attack range as experienced in flight tests. The cause of the uncommanded lateral motions was unsteady asymmetric wing stall. The paper also shows that free-to-roll data or static force and moment data alone are not enough to accurately capture the potential for an aircraft to experience uncommanded lateral motion.


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    Title :

    Free-to-Roll Investigation of Uncommanded Lateral Motions for an Aircraft with Vented Strakes


    Contributors:
    E. M. Bryant (author) / D. B. Owens (author) / J. B. Barlow (author)

    Publication date :

    2005


    Size :

    12 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Free-to-Roll Investigation of Uncommanded Lateral Motions for an Aircraft with Vented Strakes

    Owens, Elaine M. / Bryant, Elaine M. / Barlow, Jewel B. | NTRS | 2005



    Free-to-Roll Investigation of Uncommanded Lateral Motions for an Aircraft with Vented Strakes

    Bryant, E. M. / Owens, D. B. / Barlow, J. B. et al. | British Library Conference Proceedings | 2005