The Blended Wing Body (BWB) configuration is a hybrid shape with unique features capable to take benefits from both flying wing and conventional aircraft. The poof of an unconventional concept configuration requires flight tests and validation on small Flight Test Demonstrators, avoiding cost and risk related to the use of a full scale model. A first 7% scaled Unmanned Aerial Vehicle (UAV) for a new generation BWB aircraft, has been designed and flight tested at the Center for Aerospace Research (CfAR), operating on unprepared grass runways (GRS). The need to evaluate the UAV, fully controlled with an autopilot, even in the critical phases of take-off and landing on concrete runways (CON), has required the design and integration of an undercarriage system.