Electric Hydrofoil Watercraft for Quiet Modular Propulsion

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Solution Overview

Problem

Existing watercraft devices lack efficient and environmentally friendly propulsion systems that provide a smooth transition between non-foiling and foiling modes, are easy to operate, and offer safe and portable hydrofoil sports experiences.

Innovation Solution

A watercraft device incorporating a hydrofoil and an electric propeller system with modular components, allowing for weight-shift control, wireless throttle control, and adjustable hydrofoil configurations, along with safety features and easy transportability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If a gas-powered engine is used for propulsion, then power and speed are achieved, but environmental friendliness and operational quietness deteriorate

Engineering Contradiction:
Improvepropulsion powerVSAvoidenvironmental impact and noise
Core Design Contradiction:
PowerVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the traditional gas-powered engine with an electric motor system that draws power from a battery pack. This substitution eliminates exhaust emissions and significantly reduces operational noise, transforming the watercraft from a polluting mechanical system to an environmentally friendly electric system while maintaining propulsion capability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the energy source parameter from chemical energy (gasoline) to electrical energy (battery). This parameter change fundamentally alters the propulsion system's characteristics, enabling quiet operation and environmental friendliness while providing sufficient power for the watercraft's intended use.

Inventive Principle:
Principle #35Parameter changes

2Device complexity

If the hydrofoil and board are integrated as a single unit, then structural simplicity is achieved, but adaptability and ease of repair deteriorate

Engineering Contradiction:
Improvestructural simplicityVSAvoidcomponent replaceability
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent divides the watercraft into separable modules: a board component and a hydrofoil component that can be detached from each other. This segmentation allows users to replace or repair individual components independently, enhancing adaptability and ease of maintenance while keeping the overall structure relatively simple through standardized connection interfaces.

Inventive Principle:
Principle #1Segmentation

3Ease of operation

If the electric motor and battery are integrated into the hydrofoil, then portability is improved, but device complexity and manufacturing difficulty deteriorate

Engineering Contradiction:
ImproveportabilityVSAvoidsystem integration complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines the electric motor and battery pack into an integrated propulsion unit that attaches to the board via the hydrofoil structure. This merging consolidates multiple components into a single portable assembly, enhancing ease of transport and storage while managing complexity through unified design and standardized attachment mechanisms.

Inventive Principle:
Principle #5Merging (Combining)

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 device provides a quiet, efficient, and safe hydrofoil experience with a smooth transition between modes, enhanced operator control, and ease of transportation, making hydrofoil sports accessible to a wider audience.

Implementation Method 1

a hydrofoil coupled to a bottom surface of the board... a center of buoyancy in a non-foiling mode and a center of lift in a foiling mode are aligned

Methodology Applied
Scientific EffectHydrodynamic lift: Foil (fluid mechanics)

Implementation Method 2

an electric propeller system coupled to the hydrofoil, wherein the electric propeller system powers the watercraft device

Methodology Applied
Scientific EffectElectromagnetic conversion to mechanical motion: Electromagnetic Induction

Implementation Method 3

the power supply system including a housing, the housing including a first battery

Methodology Applied
Scientific EffectBattery electrical energy storage: Battery (electricity)

Data Source

PatentUS12509186B2Watercraft device with hydrofoil and electric propeller system
Publication Date: 2025.12.30 KAI CONCEPTS LLC
  • US12509186B2 patent drawing
  • US12509186B2 patent drawing
  • US12509186B2 patent drawing

AI summary

A hydrofoiling watercraft is disclosed that includes a board having a top surface for supporting a user and a bottom surface. Extending from the top surface of the board is a handlebar. Extending from the bottom surface of the board is a hydrofoil including a strut and a hydrofoil wing. A propulsion system is attached to the hydrofoil.