AIRFRAME OF MULTIMODE MONOPLANE Russian patent published in 2001 - IPC

FIELD: heavier-than-air flying vehicles. SUBSTANCE: airframe has a wing with outer panels center section combined with middle fuselage which includes also crew cabin and compartments for fuel, equipment and retracted undercarriage legs. One or two engine nacelles are located in tail fuselage. One or two air intakes with air supply passages behind each of them are coupled with engine nacelle. Members for interconnected of airframe units and units for connecting each turbojet engine and undercarriage legs are secured to skeleton of airframe units. Skeleton includes longitudinal and transversal members secured to respective panels. Each outer panel and center section is of wing cell-type construction at section along elastic axis. Tail fuselage and its par between crew cabin and center section are made in the form of monocoque. Longitudinal and transversal members of center section skeleton and its upper and lower panels are made integral or coupled with similar members of skeleton and panels of said parts of fuselage are parts of wing outer panels for transmitting the shearing forces, torsional and bending moments of respective units of airframe. Parts of two engine nacelles spaced apart which project below middle one and carry vertical and horizontal tails are included into common semi-monocoque of tail fuselage by means of side beams. Transversal members of skeleton of each air intake and air supply passage are secured respectively to fuselage and center section. EFFECT: reduced mass at retained strength. 2 cl, 24 dwg