The C-17A was known for Level 2 handling qualities during aerial-refueling and extensive turbofan time delay during both aerial-refueling and powered-lift configuration landing. This increased the pilot compensation required for aerial-refueling and decreased safety margins for adverse wind condition landings. The Aerial-Refueling Handling Qualities Improvement (ARHQI) was a three-axis control law designed to improve HQ with a vertical-speed feedback loop. Additionally, ARHQI implemented flap and spoiler bias with elevator feedback to create a throttle-controlled drag differential, with zero net pitching moment, to augment relative fore-aft control and reduce time delay. Robust Flight Path Control was a control law designed to reduce time delay by mixing flap, spoiler, and elevator with throttle movement to increase powered-lift control. These two control laws were developed in a risk-reduction program including control law first-flight, safety build-up, in-flight control law tuning, offset landings, tanker contacts, and lessons learned for future flight control developmental testing.


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    Developing a Flight Test Strategy for Adaptive Flight Control Laws

    Berra, Lee / Campbell, Christopher / Wilson, Taylor | AIAA | 2017


    DEVELOPING A FLIGHT TEST STRATEGY FOR ADAPTIVE FLIGHT CONTROL LAWS (AIAA 2017-3649)

    Berra, Lee / Campbell, Christopher / Wilson, Taylor | British Library Conference Proceedings | 2017


    Flight control laws for vertical flight path

    CHRISTENSEN KEVIN THOMAS / SHUE SHYHPYNG JACK / CAUDILL TROY SHELDON | Europäisches Patentamt | 2016

    Freier Zugriff

    Flight testing robust autoland control laws

    Looye, G. / Willemsen, D. / Bauschar, J.-M. et al. | AIAA | 2001


    F-8C adaptive flight control laws

    Hartmann, G. L. | TIBKAT | 1977