Multi-Hull Paddleboard Channel Design for Stable Fast Tracking

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Solution Overview

Problem

Current stand-up paddleboards (SUPs) face challenges in stability, speed, and tracking, particularly in racing and recreational designs, with flat-bottomed hulls leading to instability, reduced speed due to increased wetted surface area, and inefficient drainage systems.

Innovation Solution

A combination single and double hull watercraft design featuring asymmetrical foil-shaped pontoons with a parallel-walled channel between them, providing improved stability, speed, and tracking through reduced wetted surface area and hydrodynamic lift, while maintaining ease of use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If flat-bottomed hull design is used, then ease of manufacture and initial stability are improved, but speed and tracking performance deteriorate due to increased wetted surface area

Engineering Contradiction:

Improveease of manufactureVSAvoidspeed

Core Design Contradiction:

Ease of manufactureVSSpeed

Solution Approach 1:

The watercraft is divided into multiple discrete foam blocks (first foam block, second foam block, third foam block, fourth foam block) arranged in a specific configuration. This segmentation allows each block to contribute differently to hydrodynamic performance while maintaining manufacturing simplicity through modular construction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention transitions from a traditional single flat-bottomed hull to a multi-block configuration that creates an effective V-shaped or Vee-hybrid hull form. This dimensional reconfiguration reduces wetted surface area by distributing the hull volume across multiple elevated blocks rather than a single contact plane, thereby improving speed and tracking.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If wider hull design is used, then stability is improved, but speed deteriorates due to increased wetted surface area

Engineering Contradiction:

ImprovestabilityVSAvoidspeed

Core Design Contradiction:

Stability of the object's compositionVSSpeed

Solution Approach 1:

The watercraft uses four separate foam blocks positioned at different locations (front left, front right, rear left, rear right) to provide stability through distributed buoyancy. This segmentation maintains stability without requiring a single wide hull, thereby reducing wetted surface area and improving speed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The foam blocks are configured to create curved or V-shaped hull surfaces rather than flat bottoms. This curvature allows the watercraft to cut through waves more efficiently while maintaining stability, reducing the wetted surface area compared to wide flat-bottomed designs.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Speed

If narrower hull design is used, then speed is improved through reduced wetted surface area, but stability and ease of use deteriorate

Engineering Contradiction:

ImprovespeedVSAvoidstability

Core Design Contradiction:

SpeedVSStability of the object's composition

Solution Approach 1:

The narrow speed-optimized profile is achieved through four separate foam blocks rather than a single narrow hull. This segmentation distributes the buoyant force across multiple points, providing stability despite the narrow overall width and reduced wetted surface area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses vertical elevation of foam blocks to create an effective wider stance without increasing the waterline width. This dimensional change provides stability through increased freeboard and distributed buoyancy while maintaining the narrow profile needed for speed.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Ease of manufacture

If symmetrical hull shape with single fin is used, then ease of manufacture is improved, but tracking and directional control deteriorate

Engineering Contradiction:

Improveease of manufactureVSAvoidtracking

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The foam blocks are configured in an asymmetrical arrangement with different positions and orientations (first block at front left, second at front right, third at rear left, fourth at rear right). This asymmetry creates inherent directional stability and improved tracking performance while maintaining relative manufacturing simplicity through modular block construction.

Inventive Principle:

Principle #4Asymmetry

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 enhances stability and speed, reduces energy consumption, and improves tracking, making it suitable for various sea conditions and shallow waters, with reduced production complexity and cost.

Implementation Method 1

providing improved stability, speed, and tracking through reduced wetted surface area and hydrodynamic lift

Methodology Applied

Scientific EffectHydrodynamic lift:

Implementation Method 2

pontoons defining a parallel-walled channel therebetween from nose to tail

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Data Source

PatentUS12497138B2Combination single and double hull watercraft

Publication Date: 2025.12.16 PIERCE EDWARD ALAN

AI summary

A paddleboard with a multi-hull underbody includes pontoons defining a parallel-walled channel from nose to tail and an upper deck monolithically joined to the pontoons. The upper deck has longitudinal edges contiguous with an outer curvature of the pontoons. The paddleboard exhibits improved ease of use, speed, stability, energy efficiency, and tracking for both recreational and racing use.