The use of unmanned air vehicles (UAV) in support of the Navy from small ships to fulfill tasks such as reconnaissance of large areas will succeed only if the user gains a high amount of confidence in the reliable operation of such a system, especially during the take off and landing phase. Take off from and landing on small landing pads on aviation facility ships in all-weather conditions prefer the application of VTOL-UAV's (Vertical Take Off and Landing) with a coaxial rotor system. Manual take off and landing procedures which have to be applied during operational service both at day time and at night under all-weather conditions and ship motions overtax the service personnel already at low sea states. This fact requires automatic take off and landing procedures. The German Ministry of Defence commissioned Dornier (DASA) in November 1990 with the development, test and demonstration of an automatic take off and landing system on the basis of the Gyrodyne QH-50 drone helicopter in order to prove the feasibilty of such a system in general. The essential ship and sea state dependent motions of the landing pad - roll, pitch and heave - were simulated with a ship deck simulator. The customer's requirement consisted of ten automatic take offs and landings of the UAV from a 4 by 4 meters landing pad. The test and demonstration phase was performed on the airfield of Friedrichshafen in the presence of experts from several NATO-Countries by the end of 1991.


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    Title :

    Automatic Flight Control System for an Unmanned Helicopter System Design and Flight Test Results


    Contributors:
    M. Weidel (author) / W. Alles (author)

    Publication date :

    1995


    Size :

    10 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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