Modular Payload Elevator for VTOL Aircraft Weight Reduction
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Solution Overview
Problem
Vertical takeoff and landing (VTOL) aircraft face weight penalties and high fuel consumption due to oversized propulsion units, limiting their operational capabilities and efficiency.
Innovation Solution
A payload elevator system with modular propulsion modules that can be selectively coupled and decoupled to provide various thrust configurations, allowing for efficient transportation of payload modules to desired altitudes while minimizing the overall weight and fuel requirements of the air vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If oversized propulsion units are used to provide VTOL capability, then vertical takeoff and hover capability is achieved, but weight penalty increases
Solution Approach 1:
The propulsion system is divided into multiple independent propulsion modules that can be selectively coupled to the body. Instead of using a single oversized propulsion unit, the system uses several smaller modules (e.g., four propulsion modules) that can be independently attached or detached, providing VTOL capability only when needed while reducing overall weight during aerodynamic flight.
Solution Approach 2:
The propulsion configuration is made dynamic and adjustable. The coupling system allows the propulsion modules to be selectively coupled and decoupled based on operational requirements. During VTOL operations, all modules are coupled to provide sufficient thrust; during aerodynamic cruise, some or all modules can be decoupled to reduce weight and improve efficiency.
2Ease of operation
If oversized propulsion units are used to provide VTOL capability, then vertical takeoff and hover capability is achieved, but fuel consumption increases
Solution Approach 1:
The propulsion system is segmented into multiple independent modules that can be selectively activated. Only the necessary number of propulsion modules are coupled and activated during VTOL operations, rather than running a single oversized engine at low efficiency. This reduces fuel consumption by matching propulsion capacity to actual operational needs.
Solution Approach 2:
The system dynamically adjusts propulsion configuration based on flight phase. During aerodynamic cruise, the coupling system allows decoupling of propulsion modules, reducing drag and weight. During VTOL transitions, modules are coupled as needed, optimizing fuel efficiency across different operational phases.
3Weight of moving object
If modular propulsion modules are selectively coupled and decoupled, then weight and fuel requirements are minimized, but device complexity increases
Solution Approach 1:
The coupling system is designed as a universal interface that can accommodate multiple propulsion modules of the same type. The body includes multiple identical coupling points, and each propulsion module has standardized coupling mechanisms, allowing any module to be coupled to any point. This standardized universal interface reduces the complexity that would otherwise arise from custom coupling mechanisms for each module.
Solution Approach 2:
The system is designed to easily discard (decouple) propulsion modules when they are no longer needed, and recover (recouple) them when required. The coupling system allows rapid attachment and detachment of modules without complex procedures, enabling the system to adapt its configuration based on operational requirements while minimizing permanent complexity.
4Use of energy by moving object
If modular propulsion modules are selectively coupled and decoupled, then fuel consumption is reduced, but device complexity increases
Solution Approach 1:
The standardized universal coupling interface enables flexible reconfiguration of propulsion modules to optimize fuel consumption across different flight phases. The same coupling mechanism handles all module attachments and detachments, simplifying the control logic despite the modular complexity. This universal interface makes the fuel efficiency benefits achievable without proportionally increasing system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the transportation of payload modules to high altitudes with minimal fuel consumption and reduced weight penalties, allowing a large percentage of the payload weight to be the composite air vehicle's total weight, and facilitates efficient return to the takeoff location.
Implementation Method 1
each said propulsion module configured for providing the respective said propulsion module set with a respective module thrust
Data Source
AI summary
A payload elevator system and method are disclosed, configured for providing a plurality of alternative payload elevator configurations, each payload elevator configuration being configured for transporting a payload module. A composite air vehicle configuration is also provided, including a respective payload elevator configuration, the payload elevator configuration being defined by and provided by the payload elevator system, and also including at least one payload module reversibly engaged to the payload elevator configuration via a corresponding engagement and release system.