cowling monolithic improved aircraft engine and manufacturing method

摘要

A curvilinear hood (11) of an aircraft engine made from a composite material having a longitudinal axis parallel to the longitudinal axis of the aircraft; the hood (11) comprising a coating (13), transverse ribs (15) and longitudinal beams (17, 19); transverse frames (15) being configured with a cross section in omega comprising a head (12), two webs (16, 16 ') and two feet (20, 20'); the longitudinal beams (17, 19) by at least one first portion (21) being formed in an area crossing a transverse frame (15) and at least one second part (23) in an area which does not cross a transverse rib ( fifteen); each first portion (21) being configured with a cross section in omega comprising a head (31), two webs (30, 30 ') and two feet (34, 34') and having the same shape as the transverse ribs (15) so that the first part (21) can be superimposed on a transverse frame (15) in the crossing region, characterized in that: - each second part (23) of the longitudinal beams (17, 19) is formed with a cross section R comprising a head, a web (41) and a foot; - the webs (41) of the second portions (23) of the longitudinal beams (17, 19) are arranged in one plane (40); - the curvilinear hood (11) is a monolithic assembly. - the head of at least one longitudinal beam (17, 19) comprises at least a first portion with a constant width W1 on both sides of the plane (40) of the webs (41) and at least a second portion configured to be used as a bonding area of ​​a fitting of the engine, with a width W greater than 2 x W1 along its length and having a varying width to accommodate the change in width between the heads (42) of the central portions (25) of the second portions (23) and the heads (31) of the first parts (21).