Objectives: a) Map the vortex effects; b) Formation Auto-Pilot Requirements. Two NASA F/A-18 aircraft in formation: a) NASA 845 Systems Research Aircraft; b) NASA 847 Support Aircraft. Flight Conditions: M = 0.56, 25000 feet (Subsonic condition); b) M = 0.86, 36000 feet (Transonic condition). Nose-To-Tail (N2T) Distances: 20, 55, 110 and 190 feet. Lessons learned: a) Controllable flight in vortex is possible with pilot feedback (displays); b) Position hold at best C(sub D), is attainable; c) Best drag location is close to max rolling moment; e) Drag reductions demonstrated up to 22% (WFE up to 20%); f) Induced drag results compare favorably with simple prediction model; g) "Sweet Spot" (lateral & vertical area > 25%) is larger than predicted; h) Larger wing overlaps result in sign reversals in roll, yaw; i) As predicted, favorable effects degrade gradually with increased nose-to-tail distances after peaking at 3 span lengths aft; and j) Demonstrated - over 100 N mi (>15%) range improvement and 650 lbs (14%) fuel savings on actual simulated F/A-18 cruise mission.


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    Titel :

    Autonomous Formation Flight: Project Overview


    Beteiligte:
    Cole, Jennifer (Autor:in) / Cobleigh, Brent (Autor:in) / Vachon, Jake (Autor:in) / Ray, Ronald J. (Autor:in) / Ennix, Kimberly (Autor:in) / Walsh, Kevin (Autor:in)

    Erscheinungsdatum :

    08.02.2008


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Autonomous Formation Flight: Project Overview

    J. Cole / B. Cobleigh / J. Vachon et al. | NTIS | 2008


    Autonomous formation flight

    Giulietti, F. / Pollini, L. / Innocenti, M. | Tema Archiv | 2000


    Autonomous Formation Flight

    Schkolnik, Gerard S. / Cobleigh, Brent | NTRS | 2004


    Abort Flight Test Project Overview

    Sitz, Joel | NTRS | 2007