Pivoting Stabilizer Fin for Towable Kayak Cooler Drag Reduction
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Solution Overview
Problem
Towable kayak coolers without stabilizer fins experience directional deviations, drag, and increased paddling effort due to slackening and tightening tow lines, leading to slowed kayak movement and potential entanglement with obstacles like logs and sandbars, disrupting the kayaking experience.
Innovation Solution
A pivoting rudder fin system with a mounting plate, eye bolts, and removable pivot pin, attached to the kayak cooler, allowing the fin to pivot freely between vertical positions and act as a counterweight to maintain direction and reduce drag, preventing contact with obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a towable kayak cooler is attached to a kayak using a strap, then the kayaker can carry additional bulky items, but the cooler tracks from side to side causing drag and slowing down the towing kayak
Solution Approach 1:
A stabilizer fin assembly is introduced as an intermediary component between the cooler and the water. The fin extends into the water to provide hydrodynamic stability, acting as a mediator that prevents the cooler from tracking side to side without requiring modifications to the cooler itself or the kayak
Solution Approach 2:
The stabilizer fin is designed to pivot about a horizontal axis, allowing it to dynamically adjust its angle in response to water conditions and cooler movement. This dynamic positioning optimizes the fin's effectiveness in reducing drag while maintaining the ability to carry the cooler
2Stability of the object's composition
If a stabilizer fin is added to the kayak cooler, then directional stability is improved, but the device complexity increases
Solution Approach 1:
The stabilizer fin assembly is designed as a separate, modular component that can be independently attached to the cooler. The assembly includes distinct elements (fin, mounting bracket, pivot mechanism) that can be manufactured separately and assembled together, simplifying the overall system while providing stability functionality
Solution Approach 2:
A mounting bracket serves as an intermediary component that connects the stabilizer fin to the cooler. This separate mounting mechanism allows the fin to be attached without modifying the cooler's primary structure, maintaining simplicity while achieving directional stability
3Device complexity
If the cooler is towed without directional stabilization, then the device complexity remains low, but the cooler gets stuck in logs and sandbars
Solution Approach 1:
The stabilizer fin provides preliminary directional control that prevents the cooler from drifting toward obstacles like logs and sandbars. By maintaining a straight tracking path before contact occurs, the fin preemptively avoids potential entanglement issues
Solution Approach 2:
The mounting bracket and pivot mechanism serve as intermediaries that allow the fin to adjust its position in response to water conditions, providing reliable obstacle avoidance while maintaining a simple overall design
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 stabilizer fin keeps the kayak cooler aligned with the kayak's direction, reduces drag, prevents entanglement, and maintains kayak speed, enhancing the paddling experience by allowing kayakers to keep pace with their group without excessive effort.
Implementation Method 1
The fin comprises a generally v-shaped front edge to reduce drag in the water. The fin keeps the pull-behind device straight, and prevents it and the towing watercraft from diverting from the intended direction.
Implementation Method 2
the fin is mounted using a removable pivot pin wherein the removable pivot pin passes through a pair of holes in the raised portion and through a hole in the fin. The fin is freely pivoting between a generally vertical 'up' position and a generally vertical 'down' position.
Data Source
AI summary
This present invention relates to a stabilizer fin which is designed to act as a rudder system for a towable floatation device. The stabilizer fin can be mounted to any conventional pull behind floatable device to keep the device tracking straighter as it is pulled through the water. The stabilizer fin assembly comprises a mounting plate that is moulded to fit to the shape of the rear of the floatable device, and a fin designed to be attached to the mounting plate. The fin pivots freely between vertical up and down positions. The fin is counterweighted in order for the fin to fall freely into the lowered or down position while in the water. The stabilizer fin ensures that the floatable device does not create unnecessary drag and eases the paddling process for a watercraft operator towing the floatable device.