TOROIDAL FUSELAGE OF UNMANNED FLYING VEHICLE Russian patent published in 1998 - IPC

FIELD: aeronautical engineering. SUBSTANCE: fuselage includes main rotor unit for opposite rotation which is secured on fuselage by means of radial struts fitted coaxially inside passage of fuselage. Fuselage is made in form of circular structure with C-shaped cross section; wall of this structure forms passage of toroidal fuselage and upper and lower edges of this wall bound its interior; C-shaped circular structure is provided with at least three pairs of frame bulkheads and closing segment mounted between upper and lower edges of C-shaped circular structure. Frame bulkheads are located in inner chamber of fuselage at equal distance; bulkheads of each pair of bullheads bound two different areas: smaller area is formed between adjacent bulkheads of one pair and larger area is formed between adjacent bulkheads of two pairs; axes of radial struts securing the main rotor unit on fuselage pass through smaller areas of its interior. EFFECT: enhanced reliability. 4 cl, 32 dwg