APPARATUS AND METHOD FOR MINIMIZING ENGINE BACKBONE BENDING

摘要

The aircraft jet engine is carried by a frame (4), and has an engine core casing (18B) acting as a beam. An engine core cowl (30) is made of a composite material that maintains structural strength within a given temp. range. The outer surface of the cowl is cooled by the ambient airstream. The sidewall (32) of the cowl is stiffened by beams on its inner surface, pref. including axial beams (34) and circumferential beams (38). The beams are tubular and have interconnecting passageways. The cowl is connected to and structurally integrated with the engine casing. Cooling air is aspirated through the passageways to maintain the inner portions of the beams at the same temp. as the outer surface of the sidewall. The flow of cooling air is metered.