INTEGRAL AIRCRAFT AIRFRAME FROM COMPOSITE Russian patent published in 2014 - IPC B64C1/06 B64F5/00 

FIELD: aircraft engineering.

SUBSTANCE: aircraft fuselage comprises skin and stringers 1. Said skin comprises skin portion 5 and main skin 3. Note here that fuselage comprises U-like elements (15) each including two L-like sections (4a+5a and 4b+5b) jointed with skin part (5) so that said U-like elements (15) perform two structural functions at a time, that is, as frame supports and as a skin to make integral fuselage with no rivets or joints. U-like elements (15) comprises stiffness elements (6) to allow a precise extra thickness at folding zones of elements (15). In production of integral fuselage, layers of composite 7 are applied in layers to make U-like elements (15) and composite layers are laud to make stringers 1. Then feet are folded to make U-like elements (15) and stringers (1). U-like elements (15) are arranged in hardening tooling jointly with stringers (1) to lay main skin (3). Then finished structure is hardened by applying pressure and temperature for sealing of all structural zones.

EFFECT: increased strength and reduced weight.

13 cl, 18 dwg