AIRFRAME FOR A HIGHLY MANEUVRABLE MULTI-MODE AIRCRAFT

摘要

The invention relates to heavier-than-air aircraft and is intended for use primarily in highly maneuverable multi-mode aircraft operating at both subsonic and supersonic speeds. The aim of the invention is to provide the necessary durability and rigidity of the frame of the airframe with only a negligible increase in the mass thereof and the inclusion of large cutouts in the lower part of the fuselage for cargo compartments. At the same time, the technical result of redistributing the stresses in the load-bearing members of the aircraft airframe which are caused by external loads is achieved as a result of the judicious arrangement of the load-bearing members of the frame of the airframe. The structural layout of the fuselage includes transverse and longitudinal load-bearing members in the form of fuselage bulkheads (17-25) and longitudinal walls (26-29), respectively. A set of longitudinal walls (26-29) passes through the entire middle part (3) and rear part (5) of the fuselage. The centre section (12) is arranged in the plane of the maximum structural heights of the wing (section D-D) and is formed by the bulkheads (17-25). Large longitudinal cutouts are provided in the lower part of the fuselage for the cargo compartments (10, 14). The structural layout of the cutouts includes the longitudinal walls (26), connected to the bulkheads of the centre section (12).