Segmented Parachute Sliders for Low-Altitude Canopy Opening

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Solution Overview

Problem

Existing parachutes face issues with excessive descent height loss and deployment time delays at low altitudes due to inadequate sequencing of canopy opening, leading to fabric tears and tears, especially in cluster use, and are hindered by complex mechanisms or high costs.

Innovation Solution

A parachute design with segmented sliders that allow controlled deployment by sliding along suspension lines, using attachment means to connect through-elements, reducing aerodynamic drag and mechanical constraints, and ensuring stable descent.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a continuous annular slider is used to slow down deployment through aerodynamic drag, then the canopy opening is sequenced and deceleration is provided, but the time delay is too long resulting in excessive descent height loss

Engineering Contradiction:

Improvecanopy opening sequencingVSAvoiddeployment time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The continuous annular slider is divided into multiple discrete segmented sliders distributed along the suspension lines. Each segmented slider provides localized aerodynamic drag and sequencing control, reducing the overall time delay compared to a single continuous slider while maintaining reliable canopy opening sequencing through distributed drag points.

Inventive Principle:

Principle #1Segmentation

2Speed

If mechanical block or pyrotechnic systems are used to slow down deployment, then deployment speed is controlled, but the device complexity and cost increase significantly

Engineering Contradiction:

Improvedeployment speed controlVSAvoidmechanical assembly complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

Complex mechanical block systems and pyrotechnic mechanisms are replaced with simple segmented sliders that utilize aerodynamic drag naturally. The sliders are passive components that automatically control deployment speed through their aerodynamic properties without requiring complex mechanical actuation or pyrotechnic initiation systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The segmented sliders are self-regulating components that automatically control deployment speed through aerodynamic drag without requiring external control systems. The system uses the natural airflow during descent to provide the necessary drag force, eliminating the need for powered actuators or pyrotechnic systems.

Inventive Principle:

Principle #25Self-service

3Device complexity

If no deployment control device is fitted for low altitude drops, then the parachute structure is simple, but fabric burns and tears occur due to poor sequencing and violent rapid opening

Engineering Contradiction:

Improveparachute structure simplicityVSAvoidfabric damage prevention

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The parachute uses multiple segmented sliders distributed along the suspension lines to provide distributed aerodynamic drag during deployment. This segmentation allows for gradual sequencing of the canopy opening across multiple points, preventing the violent rapid opening that causes fabric burns and tears while maintaining overall structural simplicity.

Inventive Principle:

Principle #1Segmentation

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 design provides reliable, rapid, and controlled deployment at low altitudes, minimizing fabric damage and ensuring stable descent speeds, suitable for both single and clustered parachutes.

Implementation Method 1

the slider being designed to slide along the suspension lines that pass through the through-elements in the direction from the first ends of said suspension lines towards their second ends when the parachute starts a descent

Methodology Applied

Scientific EffectGravitational force: Gravitation

Implementation Method 2

sliders that provide deceleration by using their aerodynamics so as to slow down and sequence the opening of the canopy

Methodology Applied

Scientific EffectAerodynamic drag: Drag

Data Source

PatentUS12559241B2Parachute with segmented sliders

Publication Date: 2026.02.24 SAFRAN ELECTRONICS & DEFENSE (FR)

AI summary

This parachute comprising a canopy having a leading edge and a trailing edge opposite the leading edge, suspension lines each having a first end attached to the leading edge and a second end that is designed to bear a load, and a slider having through-elements for the suspension lines to pass through, said elements being connected to one another by attachment means, each of said through-elements being passed through by one of the suspension lines and being free to move in translation relative thereto, the slider being designed to slide along the suspension lines that pass through the through-elements in the direction from the first ends of said suspension lines towards their second ends under the effect of gravity and the force generated by the suspension lines spreading apart when the parachute starts a descent, tightening and spreading apart the suspension lines as the canopy inflates.