VTOL Aircraft Powerplane Cabin Decoupling
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Solution Overview
Problem
Designing electrically-powered VTOL aircraft that combine performance, safety, and a stable passenger experience in a cost-effective, maneuverable package suitable for congested environments is challenging, as existing designs often compromise on range, maneuverability, weight, cost, and complexity.
Innovation Solution
The VTOL aircraft features a vertically elongated fuselage with a powerplane assembly that pitches and rolls independently, using a pivotal coupling to generate thrust efficiently without additional actuators, reducing cabin tilt and vibration, and incorporating a ballistic recovery system for enhanced safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If Multirotor solutions are used, then simplicity and cost-effectiveness are improved, but range is limited and horizontal thrust generation tilts the airframe causing passenger discomfort
Solution Approach 1:
The aircraft is divided into functionally independent modules: a multirotor lift system for vertical flight and a separate fixed-wing propulsion system for forward flight. This segmentation allows each subsystem to be optimized independently, enabling extended range through efficient wing-based cruise while maintaining the simplicity of electric multirotor technology for vertical operations.
Solution Approach 2:
The aircraft employs dynamic reconfiguration of its propulsion system, transitioning from a static multirotor configuration to a dynamic hybrid configuration where the fixed wing becomes the primary propulsion source during forward flight. This dynamic adaptation eliminates the need for complex tilting mechanisms while extending operational range through aerodynamic efficiency.
2Duration of action of moving object
If Lift+Cruise solutions with wings and separate forward propulsion are added, then range is increased, but maneuverability is lost and weight, cost and complexity increase
Solution Approach 1:
The invention merges the lift-generating function and forward propulsion function into a unified hybrid configuration. The fixed wing serves dual purposes: generating lift during forward flight and providing aerodynamic propulsion through its interaction with the air, thereby reducing the need for separate complex propulsion systems while extending range.
Solution Approach 2:
The fixed wing structure is designed to perform multiple functions: it generates aerodynamic lift during forward flight, provides propulsion through its airfoil interaction with the airflow, and contributes to overall aircraft stability. This multi-functionality reduces the number of separate components needed, thereby reducing complexity while extending operational range.
3Duration of action of moving object
If Tilt Rotor solutions with tilting rotors are used, then range is increased, but complexity, cost and reliability concerns increase due to additional moving parts
Solution Approach 1:
The invention extracts the tilting mechanism from the rotor system entirely. Instead of using complex tilting rotors, the design separates the lift-generating rotors from the forward propulsion function, which is achieved through fixed wing aerodynamics. This extraction eliminates the reliability concerns associated with moving tilting mechanisms while maintaining extended range capability.
Solution Approach 2:
The invention replaces the mechanical tilting rotor system with an aerodynamic propulsion system based on fixed wing interaction with the airflow. This substitution eliminates complex mechanical tilting mechanisms and their associated reliability issues, while achieving the same goal of extended range through efficient forward flight capability.
4Device complexity
If the powerplane assembly is rigidly coupled to the fuselage, then structural simplicity is maintained, but cabin tilt and vibration increase during maneuvers
Solution Approach 1:
The invention introduces a flexible coupling as an intermediary element between the powerplane assembly and the fuselage. This flexible connection allows relative movement and vibration isolation, reducing the transmission of vibrations and tilts to the cabin while maintaining overall structural integrity. The flexible coupling acts as a mediator that decouples the rigid connection without requiring complex active control systems.
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
This design enhances performance, passenger comfort, and reduces manufacturing and operational costs while maintaining safety and maneuverability, allowing for efficient short-range operations in urban environments with minimal noise and footprint.
Implementation Method 1
a plurality of rotor motors, each having a stator and a rotor, mounted within the powerplane assembly
Data Source
AI summary
An electrically-powered VTOL aircraft has a fuselage with a cabin flexibly connected to a powerplane assembly that includes a plurality of electrically-powered rotors and booms. The powerplane assembly can pitch and roll relative to and independently of the cabin, thereby generating efficient fore, aft and lateral thrust while the cabin attitude remains unchanged. This provides a stable passenger experience and enhanced performance and controllability with reduced cost and complexity. In some embodiments, the fuselage is vertically elongated and the powerplane assembly mounts above the fuselage such that a person may walk beneath the rotors completely erect without the fear of being struck by any of the rotors. Using a vertically elongated cabin in conjunction with a relatively high powerplane provides various performance benefits that improve controllability and maneuverability particularly in congested environments, reduce complexity and costs, and enhance passenger safety and experience.