Design methodology for hybrid (VTOL + Fixed Wing) unmanned aerial vehicles

  title={Design methodology for hybrid (VTOL + Fixed Wing) unmanned aerial vehicles},
  author={Ashraf M. Kamal and Alex Ramirez-Serrano},
Transitional aircraft are systems capable of flying as fixed-wing aircraft or rotorcraft as well as transition between these modes when desired/needed. Operation in helicopter mode makes the aircraft possible to Vertical Take-off and Landing (VTOL), fly at low speeds in any direction (e.g., forward and sideways), hover and perform some difficult maneuvers. In the fixed-wing mode, due to stall problems on the lifting surfaces, low speeds are not possible. However, the aircraft can make a… 
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