Aircraft Engine Pylon Coupling With Dual-Part Backup Fastening

Solution Overview

Problem

Existing fastening systems for turbojet engines to aircraft engine pylons require multiple installations, leading to excess weight and increased fuel consumption, and are unsatisfactory in terms of security and reliability.

Innovation Solution

A device comprising a baseplate with a tubular sleeve and flanges, featuring a dual-part design with centering means and backup fastening screws, allowing secure coupling to the engine pylon even in case of failure, reducing the risk of complete loss and optimizing weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple fastening installations are implemented to guard against mount failure, then reliability is improved, but weight increases and fuel consumption increases

Engineering Contradiction:

Improvefastening securityVSAvoidmount weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The baseplate is divided into two separate parts (first part and second part) that are fastened to the engine pylon independently. Each part has its own fastening system with screw, nut, and washer. This segmentation allows the propulsion system to remain attached if one part fails, while reducing the need for excessive redundancy in a single massive structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention implements a backup fastening system where the second part of the baseplate serves as a reserve attachment point. This beforehand cushioning ensures that if the first part fails, the propulsion system remains secured, eliminating the need for multiple identical installations while maintaining reliability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Reliability

If multiple fastening installations are implemented to guard against mount failure, then reliability is improved, but fuel consumption increases

Engineering Contradiction:

Improvefastening securityVSAvoidfuel consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The baseplate is divided into two separate parts (first part and second part) that are fastened to the engine pylon independently. Each part has its own fastening system with screw, nut, and washer. This segmentation allows the propulsion system to remain attached if one part fails, while reducing the need for excessive redundancy in a single massive structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention implements a backup fastening system where the second part of the baseplate serves as a reserve attachment point. This beforehand cushioning ensures that if the first part fails, the propulsion system remains secured, eliminating the need for multiple identical installations while maintaining reliability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Weight of moving object

If a single fastening installation is used, then weight is reduced and fuel consumption decreases, but reliability deteriorates due to potential complete failure

Engineering Contradiction:

Improvemount weightVSAvoidfastening security

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The baseplate is divided into two separate parts (first part and second part) that are fastened to the engine pylon independently. Each part has its own fastening system with screw, nut, and washer. This segmentation allows the propulsion system to remain attached if one part fails, while reducing the need for excessive redundancy in a single massive structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention implements a backup fastening system where the second part of the baseplate serves as a reserve attachment point. This beforehand cushioning ensures that if the first part fails, the propulsion system remains secured, eliminating the need for multiple identical installations while maintaining reliability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS12397920B2Device for coupling a propulsion system to an engine pylon of an aircraft, and corresponding aircraft

Publication Date: 2025.08.26 AIRBUS OPERATIONS (SAS)

AI summary

A device for coupling a propulsion system to an engine pylon of an aircraft, the device comprising a baseplate comprising first and second parts of the baseplate placed against each other so as to form a base suitable for being fastened to the propulsion system, and a first wall extending substantially perpendicularly to the base. The first wall of the baseplate interacts with a sleeve, a pair of flanges and fasteners to the engine pylon.