PRIMARY STRUCTURE COMPARTMENT Russian patent published in 2002 - IPC

FIELD: aircraft manufacture; construction of fuselage with pressure bottom; mechanical engineering; development of load-bearing structures. SUBSTANCE: primary structure compartment includes pressure bottom on whose external side ring frames are mounted. Stringers located meridionally are secured on pressure bottom. Main pressure bulkhead is secured in area where pressure bottom comes to compartment skin. Compartment is provided with stopper mounted between main pressure bulkhead and compartment skin. Stopper is made in form of circular plate from high-strength material; this plate is provided with lugs. Stringers of pressure bottom are coupled on these lugs. Stopper may be made separate parts coupled over perimeter of web of pressure bulkhead extending to compartment skin. EFFECT: increased service life due to availability of load-bearing structural members protecting compartment against cracking and retarding cracking if available at increased residual strength. 2 cl, 4 dwg