Pivotable Trimaran Outriggers for Shallow Water Maneuverability

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Solution Overview

Problem

Existing watercraft designs with outriggers offer limited variability in dynamic properties, making them unsuitable for applications requiring both sportive maneuverability and stability, and hydrofoil systems are restricted by draft and operational limitations in shallow water.

Innovation Solution

The outrigger is designed to be height- and width-adjustable, pivotably attached to the main hull, and can move between lateral, beneath, and above positions, with hydrofoils on telescopically extendable arms that retract into the hull for reduced draft, allowing operation in shallow water and improved maneuverability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If outriggers are arranged laterally adjacent to the main hull to increase stability, then stability is improved, but the watercraft loses sportive maneuverability and racing characteristics

Engineering Contradiction:

ImprovestabilityVSAvoidsportive maneuverability

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The outriggers are made dynamically adjustable through a pivoting mechanism that allows them to change position between lateral (for stability) and retracted (for maneuverability). The parallelogram guide enables smooth transitions between these states, allowing the watercraft to adapt its stability characteristics to different operational requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The outrigger system serves multiple functions: providing stability when extended laterally, improving hydrodynamic properties when retracted beneath the hull, and enabling sportive racing characteristics when positioned to achieve extreme lateral positions at high speeds. This multi-functionality resolves the contradiction between stability and maneuverability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If outriggers are made fixed to maintain structural simplicity, then device complexity is reduced, but adaptability and range of applications are limited

Engineering Contradiction:

Improvestructural simplicityVSAvoidrange of applications

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The pivoting mechanism with parallelogram guide provides dynamic adjustability while maintaining relatively simple construction. The mechanism allows the outriggers to assume multiple positions (lateral, beneath, above the hull) without requiring complex hydraulic or electronic systems, thus achieving high adaptability with minimal increase in device complexity.

Inventive Principle:

Principle #15Dynamics

3Reliability

If hydrofoils are attached at sufficient distance beneath the hull to achieve required height in hydrofoil operation, then hydrofoil performance is improved, but draft increases leading to damage risk in shallow water

Engineering Contradiction:

Improvehydrofoil operationVSAvoiddamage risk in shallow water

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The hydrofoils are mounted on the movable outriggers, which can be retracted beneath the main hull when not in use. This dynamic positioning allows the hydrofoils to be at sufficient distance beneath the hull during operation for optimal performance, while being protected beneath the hull during transport and in shallow water, eliminating the contradiction between operational reliability and damage risk.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The hydrofoils are extracted from the main hull structure and attached to the outriggers instead. This separation allows the hydrofoils to be independently positioned and protected, enabling them to achieve required operational height while being retractable to avoid damage in shallow water or during transport.

Inventive Principle:

Principle #2Taking out (Extraction)

4Ease of operation

If outriggers are made movable to save storage space, then ease of storage is improved, but fundamental driving properties cannot be changed

Engineering Contradiction:

Improvestorage spaceVSAvoiddriving properties

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The outriggers are made movable through a pivoting mechanism that enables not only storage retraction but also operational positioning changes. This dynamic capability allows fundamental changes in driving properties by transitioning between different outrigger configurations (lateral for stability, retracted for speed, various intermediate positions for maneuverability), far exceeding mere storage space savings.

Inventive Principle:

Principle #15Dynamics

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

This configuration enhances the watercraft's sportive behavior, stability, and maneuverability while enabling operation in shallow water without risk of damage, reducing fuel consumption, and improving comfort by minimizing flow resistance.

Implementation Method 1

hydrofoils are arranged on at least one outrigger... allow lifting the hull from the water from a specific minimum speed... flow resistance can be reduced considerably

Methodology Applied

Scientific EffectHydrofoil lift: Aerofoil