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 preproduction 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:

    Conference:

    43rd AIAA Aerospace Sciences Meeting and Exhibit ; 2005 ; Reno, NV, United States


    Publication date :

    2004-01-01


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English