HELICOPTER FUSELAGE Russian patent published in 2003 - IPC

FIELD: aviation; helicopters in particular. SUBSTANCE: rear compartment has aperture of cargo hatch with ramp hinged down around axle of attachment to rear end frame below level of floor of cargo cabin till it rests against ground. When cargo hatch is closed, ramp adjoins sloping frame engageable at the bottom with rear end frame at level of floor and with frame of superstructure at the top over line of chine at point of transition to tail boom forming aperture of cargo hatch; framework is additionally provided above sloping frame; frames of this framework are engageable at the bottom with sloping frame and with arched frame of superstructure at the top; they are interconnected by means of stringers and smooth stressed skin. EFFECT: extended functional capabilities at retained rigidity and strength of fuselage. 6 cl, 3 dwg