Water Penetrating Dart with Detachable Funnel
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Solution Overview
Problem
Traditional blowgun darts are limited in their ability to penetrate targets deeper than the shaft due to increased drag and unpredictable trajectory when the funnel hits the water surface, compromising precision and power.
Innovation Solution
A water-piercing blowgun dart design where the funnel separates from the shaft at the water surface, allowing only the shaft to penetrate with a fishing line passing through, reducing drag and enhancing accuracy and penetration power by using a frictional engagement system and a funnel cavity with a through-hole for the line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the funnel remains attached to the shaft during water penetration, then the dart maintains structural integrity, but drag increases and trajectory becomes unpredictable
Solution Approach 1:
The dart is divided into two separable components: a shaft and a funnel. The funnel is detachably attached to the shaft via a friction fit mechanism, allowing it to separate from the shaft upon water contact. This segmentation enables the funnel to remain above water while the shaft penetrates deeper, reducing drag on the penetrating portion.
Solution Approach 2:
The attachment between funnel and shaft transitions from a static friction-based connection to a dynamic separation state upon water contact. The funnel is designed to naturally detach when water resistance acts on it, transforming the system from a fixed configuration to a dynamic one where the funnel remains at the surface while the shaft continues penetration.
2Device complexity
If the funnel remains attached to the shaft, then the dart structure is simplified, but penetration depth and accuracy are limited
Solution Approach 1:
By separating the funnel from the shaft through a detachable friction-fit connection, the system allows the funnel to stay above water surface while the shaft penetrates deeper. This segmentation enables independent optimization of each component's function, improving trajectory accuracy without significantly complicating the overall structure.
Solution Approach 2:
The harmful element (funnel) is extracted from the penetrating path by detaching it from the shaft when water contact occurs. This extraction allows the shaft to penetrate deeper with greater accuracy while the funnel remains above water, eliminating its negative impact on trajectory precision.
3Object-affected harmful factors
If the funnel is detachably attached via friction engagement, then the dart can reduce drag at water surface, but the attachment mechanism becomes more complex
Solution Approach 1:
The friction-fit attachment mechanism is designed to automatically engage and disengage based on physical conditions. The funnel naturally attaches to the shaft through friction during airborne flight, and automatically detaches when water resistance acts on it. This self-service mechanism reduces drag without requiring complex active control systems or additional components.
Solution Approach 2:
The attachment mechanism utilizes changes in physical parameters (friction force, water resistance) to control the engagement and disengagement of the funnel. By designing the friction fit with specific dimensional tolerances and surface properties, the system automatically transitions from engaged to disengaged state when subjected to water contact forces.
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 the dart to travel in a straight line with increased force and accuracy, allowing penetration several feet below the water surface while the funnel remains at the surface, improving retrieval and target precision.
Implementation Method 1
the funnel is attached to the tail end solely by frictional engagement between an inner portion of the funnel and at least one protrusion along the tail end
Data Source
AI summary
A water penetrating blowgun dart is provided. The blowgun dart has a funnel removably attached to a tail end of the dart shaft so that upon contact with a water surface, the funnel moves from an engaged configuration to a disengaged configuration. The tail end may provide a slot for snugly receiving an eye, wherein the tail end and the eye have cooperating grooves so that when in the engaged configuration, the eye and tail end are secured with a filament that slightly protrudes from the flush outer surface of the shaft and eye. The protruding filament frictionally engages the funnel in the engaged configuration so that the funnel remains engaged with the shaft prior to hitting the water's surface.