Aircraft Engine Mounting System Vertical Wing Mount Configuration
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Solution Overview
Problem
The existing engine mounting systems for aircraft propulsion units result in a wide fairing at the wing, which is aerodynamically penalizing due to the offset positioning of the first and second uprights of the rear arch.
Innovation Solution
The engine mounting system incorporates a primary structure with first, second, and third wing mounts that are offset in height and longitudinally, allowing them to be positioned in a vertical longitudinal plane, thereby optimizing load transmission between the primary structure and the wing structure with minimal offset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the first and second uprights of the rear arch are positioned one on each side of the engine with offset along the horizontal transverse direction, then the engine mounting system provides stable load distribution, but the fairing at the wing becomes relatively wide which is aerodynamically penalizing
Solution Approach 1:
The invention transitions from a horizontal transverse arrangement of uprights (first embodiment) to a vertical arrangement where the first and second uprights are positioned one above the other in the vertical direction (second embodiment). This dimensional change allows the fairing to be narrower at the wing while maintaining stable load distribution through the vertical spacing between uprights.
Solution Approach 2:
The invention employs asymmetric positioning of the uprights relative to the engine centerline. Instead of symmetric offset positioning in the horizontal direction, the uprights are positioned asymmetrically with different vertical heights and longitudinal positions, allowing optimized aerodynamic profile while maintaining structural stability.
2Reliability
If the uprights are positioned with wide spacing in the transverse and horizontal direction to ensure structural stability, then the engine mounting system achieves reliable load transmission, but the aerodynamic performance is reduced due to increased drag
Solution Approach 1:
The invention relocates the load transmission function from the horizontal transverse dimension to the vertical dimension. By positioning uprights one above the other vertically rather than side-by-side horizontally, the system maintains reliable load transmission while minimizing the horizontal footprint that causes aerodynamic drag.
Solution Approach 2:
The invention optimizes the local arrangement of uprights near the wing attachment point. By concentrating the upright spacing in the vertical direction at this critical location, the system achieves reliable local load transmission to the wing while maintaining a streamlined horizontal profile for reduced drag.
Data Source
AI summary
An aircraft comprising at least one engine mounting system which connects a propulsion unit and a wing and which comprises a primary structure, engine mounts connecting the primary structure and the propulsion unit, as well as at least first, second and third wing mounts connecting the primary structure and the wing structure, the first and second wing mounts being offset height-wise with respect to one another, the third wing mount being offset in the longitudinal direction toward the rear with respect to the first and second wing mounts.