Rotary Wing Air Vehicle Rotor Brake Mechanism
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Solution Overview
Problem
Rotary-wing air vehicles face challenges in transitioning from helicopter to airplane mode due to high power consumption and complex blade rotation requirements, necessitating a more efficient and stable brake mechanism to utilize rotor blades as wings for gliding.
Innovation Solution
A modular mechanical brake mechanism that adjusts rotor blade flaps to create drag, utilizing a system of pins, tables, rods, and springs to transition between closed and open positions, allowing user-controlled rotor speed adjustment and enabling the rotor to function like a wing by creating air drag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotor is stopped and blades are rotated 180 degrees to transition from helicopter to airplane mode, then the rotor can function as a wing for gliding, but the structure becomes demanding and stability becomes risky
Solution Approach 1:
The invention applies dynamics by making the blade geometry adjustable rather than fixed. The hump position and thickness ratio can be dynamically changed to suit different flight modes (helicopter or airplane), eliminating the need for complex 180-degree blade rotation and structural reconfiguration. This resolves the stability issue while maintaining versatility.
Solution Approach 2:
The invention changes geometric parameters of the blade (hump position, thickness ratio) to adapt to different flight modes. By optimizing these parameters for each mode, the blade can function effectively as either a helicopter rotor or an airplane wing without requiring complex mechanical repositioning, thus improving reliability while maintaining adaptability.
2Speed
If the rotor continues to rotate at high speed for helicopter flight, then vertical lift is provided, but power consumption becomes very high when attempting to glide like an airplane
Solution Approach 1:
The invention enables dynamic adjustment of blade geometry (hump and thickness ratio) to optimize performance for different flight modes. When transitioning to airplane gliding mode, the blade parameters are adjusted to reduce drag and allow efficient operation at lower rotational speeds, significantly reducing power consumption compared to maintaining high rotor speed.
3Ease of operation
If elliptical flaps with same geometry on both edges are used, then the flaps can be easily brought to required position, but the blade geometry cannot be optimized for different flight modes
Solution Approach 1:
The invention applies local quality by making different parts of the blade (hump region, thickness distribution) have different adjustable properties. The hump position and thickness ratio can be independently optimized for different flight modes, allowing the blade to achieve optimal geometry for either helicopter or airplane operation while maintaining ease of positioning through the flap mechanism.
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 rotary-wing air vehicles to efficiently transition to airplane mode by reducing rotor speed through mechanical flap positioning, enhancing stability and control while minimizing power consumption.
Implementation Method 1
By creating air drag with the flaps on the blade, it provides brake almost entirely by mechanical effects.
Data Source
AI summary
A rotary wing air vehicle has a body; at least one engine located on the body; a rotor that extends outwards from the body and rotates around its own axis in connection with the engine; at least one shaft extending outward from the rotor and triggered by the engine to rotate around an axis that the shaft extends from the rotor; at least two blades connected with the shaft and triggered by the shaft to move; at least one flap on the blade which provides drag force to the rotor by its movement to a closed position or an open position; at least one brake system which is located on the body in connection with the rotor to enable the flap to move to the closed position and/or open position so that a rotational speed of the rotor is adjusted by a user.