Patent ID: 9677409
Date: 2017-06-13
CPC Classifications: B29C,B29D,B64D,F01D

Claim:
1. A curvilinear fan cowl of an aircraft engine, made of a composite material and having a longitudinal axis parallel to a longitudinal axis of an aircraft to which is attached the fan cowl, the fan cowl comprising: a skin, transverse frames and longitudinal beams, wherein the transverse frames and longitudinal beams are orthogonal with each other and attached to an inside surface of the skin; the transverse frames comprise a frame cap spaced from the skin, frame webs each extending from the frame cap towards the skin, and frame feet adjacent the skin and each extending from one of the frame webs; the longitudinal beams being formed by at least a first part in a zone crossing one of the transverse frames and at least a second part in a zone not crossing any of the transverse frames; each first part comprising a first cap overlapping the one of the transverse frames, first webs extending from the first cap towards the skin, and first feet proximate the skin and each extending from one of the first webs, and each first part having a shape in cross section configured to seat on the one of the transverse frames, wherein each second part of the longitudinal beams comprises a second cap spaced from the skin, a second web extending from the second cap towards the skin, and a foot adjacent the skin and extending from the second web; wherein each of the second webs of the second parts of the longitudinal beams are arranged in a common plane; wherein a width of the first cap on one side of the common plane is greater than a width of the first cap on the other side of the common plane, and wherein the curvilinear fan cowl is a monolithic ensemble.