Variable Pitch Propeller Blade With Self-Adjusting Composite Structure
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Solution Overview
Problem
Conventional propeller blades are inefficient across varying flight conditions due to fixed pitch designs, prone to mechanical failure, and require human intervention for pitch adjustments, leading to inaccuracies and errors.
Innovation Solution
A propeller blade design utilizing materials with varying stiffness levels and structural configurations that automatically adjust pitch based on flight conditions, minimizing drag and maximizing efficiency without human input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed pitch propeller blades are used, then the structure is simple and reliable, but the efficiency suffers during significant portions of flight because they are only maximally efficient at one particular flight condition
Solution Approach 1:
The propeller blade employs a dynamic pitch adjustment mechanism that allows the blade angle to change automatically in response to flight conditions. The blade transitions from a fixed pitch configuration to a variable pitch system where the pitch angle can be adjusted during flight to optimize efficiency across different operating regimes, directly resolving the contradiction between maintaining simple structure and achieving high productivity across varying conditions.
Solution Approach 2:
The invention changes the pitch parameter of the propeller blade dynamically based on flight conditions. By adjusting the blade pitch angle according to altitude, speed, and load variations, the system maintains optimal aerodynamic performance across different flight phases, thereby improving overall productivity without requiring complete structural redesign.
2Productivity
If mechanical systems are used to control blade pitch variation, then the propeller can be controlled to be increasingly efficient during many different conditions, but the systems are prone to inaccuracies, mechanical failure, and human error
Solution Approach 1:
The propeller blade incorporates self-adjusting mechanisms that automatically respond to flight conditions without requiring external mechanical control systems or pilot intervention. The blade pitch varies in response to aerodynamic forces and flight parameters, enabling the system to optimize efficiency while eliminating the reliability issues associated with complex mechanical control systems.
3Measurement precision
If mechanical control systems are used for pitch adjustment, then blade pitch can be varied, but human intervention is required which introduces inaccuracies and human error
Solution Approach 1:
The system achieves precise pitch adjustment through self-regulating mechanisms that respond automatically to flight conditions. The blade pitch is adjusted based on aerodynamic feedback and flight parameters without requiring manual intervention, thereby eliminating human error while maintaining operational simplicity through automatic control.
Data Source
AI summary
A propeller blade includes a first material and a second material. The first material includes fibers. The second material is different from the first material. The fibers are interspersed through the second material and the fibers are oriented in a same direction within the second material. The propeller blade is anisotropic and includes sections of the fibers.