Cinched Parachute Dynamic Reefing for Weight-Adaptability Trade-off
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Solution Overview
Problem
Conventional parachutes are limited by weight constraints, making it impractical to equip aircraft with multiple parachutes optimized for varying emergency conditions, and they fail to adapt effectively to changing conditions during emergency recoveries.
Innovation Solution
A cinched parachute system featuring a control tether that can modify the parachute's size by reefing or releasing the canopy, allowing it to adapt to different conditions, such as high-speed or low-altitude scenarios, by controlling the inner radius and opening diameter, and incorporating a severing device for quick adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple specialized parachutes are equipped for different emergency conditions, then adaptability to varying conditions is improved, but weight of the aircraft increases
Solution Approach 1:
The parachute canopy incorporates a dynamic reefing system with multiple reefing lines that allow the effective canopy area to be adjusted during deployment. This enables a single parachute to adapt its size and aerodynamic characteristics to match different emergency conditions, replacing the need for multiple fixed-size parachutes of different weights.
Solution Approach 2:
The parachute system is designed as a multi-functional device that can serve multiple purposes across different emergency scenarios. By integrating variable area control mechanisms and adjustable canopy configurations, a single universal parachute system replaces multiple specialized parachutes, reducing overall system weight while maintaining versatility.
2Weight of moving object
If a single parachute is used for all conditions, then weight is reduced, but adaptability to varying conditions deteriorates
Solution Approach 1:
The single parachute incorporates dynamic adjustment capabilities through reefing lines and variable area mechanisms that allow real-time modification of canopy size and shape during deployment, enabling adaptation to different emergency conditions without requiring multiple fixed parachutes.
Solution Approach 2:
The parachute system enables changes in critical parameters such as effective canopy area, drag coefficient, and deployment velocity by adjusting reefing line tension and canopy configuration. This allows a single parachute to optimize its performance parameters for different emergency scenarios, maintaining adaptability while reducing weight.
3Device complexity
If the parachute canopy size is fixed, then device complexity is reduced, but ability to adapt to different conditions deteriorates
Solution Approach 1:
The parachute employs a dynamic reefing system with controlled complexity - using relatively simple reefing lines, pulleys, and attachment points that can be integrated into the existing parachute structure. This dynamic mechanism allows canopy size adjustment without requiring complex active control systems, maintaining manageable device complexity while enabling adaptation.
Solution Approach 2:
The canopy is effectively segmented into multiple usable area portions through the reefing system, allowing progressive reduction of active canopy area. This segmentation approach provides adaptability through discrete area adjustments while using relatively simple mechanical components rather than complex 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
The cinched parachute system enables efficient adaptation to varying conditions, optimizing performance in different emergency scenarios while being more lightweight and compact than multiple specialized parachutes, ensuring safe recovery of aircraft or objects by controlling airflow and aerodynamics.
Implementation Method 1
The cinched parachute system enables efficient adaptation to varying conditions, optimizing performance in different emergency scenarios while being more lightweight and compact than multiple specialized parachutes, ensuring safe recovery of aircraft or objects by controlling airflow and aerodynamics.
Data Source
AI summary
A cinched parachute is disclosed. In various embodiments, a cinched parachute as disclosed herein includes a canopy comprising one or more sections of canopy material, and a device integrated with the canopy that controls dimensions of the canopy material. For example, in some embodiments the device may be used to control the size of an opening atop the parachute.