Fixed-Pitch Tail Boom Motor Matrix for Helicopter Anti-Torque
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Solution Overview
Problem
Current anti-torque systems in helicopters face inefficiencies due to vortex interference and noise issues, and existing electric motor technologies are impractical for direct replacement of mechanical drive trains due to weight and reliability concerns.
Innovation Solution
A matrix of small, fixed blade pitch electric motor modules is used instead of a traditional tail rotor, with each motor individually controlled for speed and direction to provide anti-torque thrust, reducing weight, increasing safety, and minimizing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional tail rotor is used to provide anti-torque thrust, then adequate aerodynamic response is achieved, but vortex interference reduces efficiency and increases noise
Solution Approach 1:
The patent divides the traditional single tail rotor into multiple smaller rotor elements arranged in a matrix pattern. Each rotor element generates a portion of the total anti-torque thrust, and their collective operation creates a more distributed and less turbulent airflow pattern, reducing vortex interference and noise while maintaining adequate aerodynamic response.
Solution Approach 2:
The patent replaces the mechanical drive train system with electric motor technologies. Each rotor element is driven by an independent electric motor, eliminating the need for complex mechanical transmissions, shafts, and gearboxes. This substitution reduces mechanical losses, improves reliability, and allows for precise independent control of each rotor element to optimize anti-torque performance while minimizing harmful vortex effects.
2Weight of moving object
If electric motor technologies are used to replace mechanical drive trains, then weight is reduced and safety is increased, but reliability concerns arise
Solution Approach 1:
The patent segments the anti-torque system into multiple independent rotor-motor units arranged in a matrix. Each unit operates independently with its own electric motor, eliminating the need for a single high-power motor and complex mechanical drive train. This segmentation reduces overall system weight while improving reliability through redundancy - if one motor fails, the others can continue to provide anti-torque thrust.
Solution Approach 2:
The patent changes the operational parameters by controlling the speed and direction of each electric motor independently. This allows for precise adjustment of thrust distribution across the matrix, optimizing performance for different flight conditions. The ability to vary motor parameters individually provides fine control over anti-torque generation while maintaining system reliability through adaptive operation.
3Adaptability or versatility
If a matrix of small motor modules is used instead of a traditional tail rotor, then directional thrust optimization is achieved, but device complexity increases
Solution Approach 1:
The patent designs each rotor-motor unit in the matrix to be identical and interchangeable, with each unit capable of providing thrust in multiple directions. This universal design allows the same basic module to perform multiple functions depending on its position and operational state within the matrix. The system can generate anti-torque thrust, provide directional control, and even enable maneuvering functions, reducing the need for specialized components for each function.
Solution Approach 2:
The patent uses identical copies of the basic rotor-motor unit throughout the matrix arrangement. Each unit is a replicated version of the same design, simplifying manufacturing, assembly, and maintenance. The repetitive modular structure reduces design complexity by using standardized components rather than custom-designed elements for each position, while still achieving complex directional thrust capabilities through the coordinated operation of multiple identical units.
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 solution enhances cruise efficiency, reduces passenger noise and vibration, increases stability, and allows for directional optimization of thrust, while being safer and more reliable than traditional systems.
Implementation Method 1
one or more of the plurality of first variable speed motors can operate to provide a directional thrust
Implementation Method 2
one or more fixed pitch blades attached to each of the plurality of first variable speed motors
Data Source
AI summary
The present invention includes an a plurality of first variable speed motors mounted on a tail boom of the helicopter; one or more fixed pitch blades attached to each of the plurality of first variable speed motors; and wherein a speed of one or more of the plurality of first variable speed motors is varied to provide an anti-torque thrust.