Abstract: A flow separation reducer comprises a vane which prevents an airflow from being separated in a flow interference region where a plurality of members, such as a main wing and a pylon, are joined to each other. The vane is disposed in a location where the airflow along a surface of one of the members develops a minimum negative pressure. The vane has a predetermined angle of attack with respect to the airflow for generating a vortex downstream of the vane with respect to the airflow and causing a circulation around the vane to reduce the speed of the airflow in the location.

Abstract: An aircraft has an airframe including a fuselage having major structural members made of a composite material. The airframe also includes a sweepforward main wing mounted on top of the fuselage and a T or cruciform tail on the fuselage. The aircraft has no canard. The aircraft has a pair of main landing gear units attached to the fuselage below the main wing, the main landing gear units having short strut assemblies which allow the crew and passengers to get on and off the aircraft easily. The sweepforward main wing allows a wide and comfortable cabin space to be created in the fuselage.