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@MASTERSTHESIS{Santel:229982,
      author       = {Santel, Christoph},
      othercontributors = {Gäb, Andreas},
      title        = {{A}n investigation of glider winch launch accidents
                      utilizing multipoint aerodynamics models in flight
                      simulation},
      address      = {Aachen},
      publisher    = {Publikationsserver der RWTH Aachen University},
      reportid     = {RWTH-CONV-144789},
      pages        = {XIV, 67 S.},
      year         = {2010},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University; Aachen, Techn. Hochsch., Diplomarbeit, 2010},
      abstract     = {The presented thesis investigated the mechanisms leading to
                      accidents during the winch launch of gliders. Initially,
                      data from the accident database of the German Federal Bureau
                      of Aircraft Accident Investigation was studied. Critical
                      phases of the launch were identied along with the associated
                      probabilities and risks of accidents. From this data
                      requirements to an aerodynamics model suitable for accident
                      reconstruction were formulated. An instationary multipoint
                      aerodynamics approach, based on blade element theory, met
                      these demands. A "prescribed wake" model was then coupled
                      with this multipoint aerodynamics approach to determine the
                      induced velocities at all surfaces. The developed models
                      were then validated and checked for plausibility with flight
                      test data from a Schweizer SGS 1-36 sailplane. For the
                      purpose of describing the relations between pilot and
                      aircraft behavior as well as launch safety, a flight
                      envelope limiting airspeed and pitch attitude was proposed.
                      It was shown that the aircraft's radius of gyration along
                      its pitch axis influences the path taken through the flight
                      envelope. As a consequence, motorglider conversions of
                      existing sailplane designs operate closer to the upper pitch
                      boundary of the flight envelope. With this knowledge a
                      generic 18 m class motorglider model was then implemented in
                      the developed aerodynamics model and exposed to a
                      hypothetical accident scenario. Here it was shown that under
                      the presented circumstances the risk of a pilot-provoked
                      stall of the horizontal stabilizer exists. Depending on the
                      severity of the stall, a catastrophic accident might
                      result.},
      keywords     = {Segelflug (SWD) / Aerodynamik (SWD) / Wirbel<Physik>,
                      Simulation (SWD)},
      cin          = {415410},
      ddc          = {600},
      cid          = {$I:(DE-82)415410_20140620$},
      typ          = {PUB:(DE-HGF)10},
      urn          = {urn:nbn:de:hbz:82-opus-34547},
      doi          = {10.18154/RWTH-CONV-144789},
      url          = {https://publications.rwth-aachen.de/record/229982},
}