Tail-Boom Parachute Rescue Layout for Rotor-Safe Deployment
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Solution Overview
Problem
Conventional parachute-based rescue systems for rotary-wing aircraft face challenges such as damage risk from pyrotechnic propellants, hazardous material classification, and interference with rotor components during deployment, which complicates retrofitting and affects flight characteristics.
Innovation Solution
A parachute system with a lightweight, low-friction inner container and tubular outer container design, using mechanical deployment mechanisms, ensures safe and rapid deployment without pyrotechnics, and minimizes interference with aircraft components by arranging the system along the tail boom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pyrotechnic charge is used to propel the rescue parachute away from the rotor, then the parachute can deploy at a safe distance from the rotorcraft, but the pyrotechnic propellant is classified as hazardous material requiring special precautions during design, certification, and operation
Solution Approach 1:
The patent removes the pyrotechnic charge from the rescue system entirely, extracting the hazardous element while retaining the core function of parachute deployment. The system uses a simple mechanical release mechanism instead of explosive propulsion, eliminating the need for hazardous material handling while maintaining safe deployment capabilities.
Solution Approach 2:
The patent replaces the pyrotechnic (chemical) propulsion system with a mechanical release mechanism. The parachute is deployed using conventional mechanical means such as springs, latches, or manual release systems, substituting the hazardous chemical energy source with safe mechanical energy storage and release.
2Object-affected harmful factors
If the rescue parachute is forcefully propelled away from the rotor by a pyrotechnic charge, then the likelihood of unintentional collision between the parachute and its lines with the rotor is reduced, but retrofitting an aircraft with a pyrotechnic-based rescue system presents significant problems
Solution Approach 1:
The patent extracts the pyrotechnic propulsion system from the rescue parachute assembly, leaving only the parachute and its support structure. This simplified system can be retrofitted to existing aircraft without the complex integration requirements of pyrotechnic systems, including hazardous material storage, ignition systems, and safety interlocks.
Solution Approach 2:
The patent employs a simple, inexpensive parachute system that can be easily installed and replaced on retrofitted aircraft. The mechanical deployment system uses basic components like springs and latches that are readily available and easy to install, eliminating the need for expensive, specialized pyrotechnic integration work.
3Reliability
If a conventional rescue system is installed on a rotary-wing aircraft, then emergency rescue can be provided, but the parachute and its lines may come into contact with rotor or other moving components during or after deployment
Solution Approach 1:
The patent positions the parachute deployment system in a different spatial dimension relative to the rotor components. By mounting the parachute container and deployment mechanism on the aircraft fuselage away from the rotor plane, and directing the parachute deployment path away from rotating components, the system eliminates contact risk while maintaining rescue effectiveness.
Data Source
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AI summary
Rescue system for an aircraft that is a rotary-wing aircraft, comprising a main canopy with a main line and a plurality of main canopy lines, wherein the main line connects the main canopy to the aircraft on which the rescue system is installed, an outer container with a first diameter arranged on an outside of the aircraft longitudinally along a tail boom, and an inner container arranged in the outer container and suitable for receiving the main canopy.