FUBER Rim-Driven Thruster is an innovative shaftless, direct-drive electric marine propulsion device. The motor is integrated into the outer rim of the propeller, eliminating traditional shafts and gearboxes. It offers core advantages such as high efficiency, quiet operation, maintenance-free performance, and high maneuverability, suitable for yachts, workboats, special vessels, and various other applications.

I. Core Advantages

High Propulsion Efficiency & Significant Energy Savings

Adopting shaftless rim direct drive, it eliminates transmission losses from shafts and gearboxes. With hydrodynamically optimized blade design, efficiency is improved by 15%–20% compared with traditional propulsion systems, with actual energy savings of approximately 18%. The hubless structure reduces wake vortex losses, ensuring smoother water flow and better thrust performance at low speeds.

Ultra-Quiet & Low Vibration

Mechanical transmission components such as gearboxes and drive shafts are eliminated, removing gear meshing and shaft rotation noise. Blades are directly fixed to the rim with no tip clearance noise, ensuring quiet operation. Ideal for noise-sensitive applications such as yachts, sightseeing vessels, and research vessels.

Compact Structure & Space Saving

Integrated motor-propeller design features a compact size and light weight. No long shaft systems or engine room transmission devices are required, greatly freeing up cabin and engine room space. It can be flexibly installed at the bow (bow thruster) or stern (main propulsion), adapting to narrow hull layouts.

High Reliability & Maintenance-Free

Equipped with water-lubricated bearings and fully sealed waterproof motors, with no dynamic seals or risk of oil leakage, adapting to seawater and sediment environments. With no wearing parts like gearboxes and bearings, it is maintenance-free in long-term operation, reducing downtime and maintenance costs.

Flexible Control & High Maneuverability

Supports 360° full rotation (vector thrust), enabling instant direction changes for easier lateral movement, on-the-spot turning, and precise berthing. Fast response provides outstanding advantages in narrow waterways and port terminals.

Eco-Friendly & Zero Emissions

Fully electric drive with no fuel consumption or exhaust emissions, aligning with the trend of electrification and low-carbon shipping. Compatible with marine lithium batteries, photovoltaics, and other clean energy sources, meeting environmental regulations and green shipping requirements.

Strong Adaptability & Easy Installation

Modular design can be used as main propulsion, side thruster, or stern thruster, suitable for new ship construction and retrofits. Supports fixed, retractable, fully rotatable, and other installation types, compatible with various vessel types and control systems.

II. Main Disadvantages

Limited Power Rating, Not Suitable for Large Vessels

Restricted by structure and materials, the current single-unit power is mostly within 1000kW, mainly for small and medium-sized vessels, and cannot meet the high-power propulsion needs of large ships over 10,000 tons.

Relatively High Manufacturing Cost

Integration of motors, precision bearings, anti-corrosion composite materials, and other components results in higher R&D and manufacturing costs than traditional shaft propulsion systems, with higher initial procurement costs.

Moderate High-Speed Performance

Core strengths lie in medium-to-low speed and high thrust. Efficiency and stability at high speeds are inferior to traditional high-speed propellers, making it unsuitable for vessels requiring extremely high speeds.

High Technical Threshold for Maintenance

Highly integrated structure requires professional equipment and technology for fault diagnosis and repair, which is difficult for ordinary shipyards to perform independently, relying on after-sales support from the manufacturer.

Weak Resistance to Foreign Object Entanglement

The open shaftless structure makes blades prone to entanglement by water grass, fishing nets, and debris. Protective nets are required in complex waters, increasing resistance and cost.

III. Application Scope

1. Recreational Vessels (Core Scenarios)

Luxury yachts and private yachts (17–30m): Used as bow thrusters or main propulsion, offering quiet operation, precise berthing, and maintenance-free use.

Sightseeing boats and inland waterway passenger ships: Zero emissions and low noise enhance passenger experience and meet scenic area environmental requirements.

Fishing boats and work boats: Compact size, sufficient thrust, no deck space occupation, and flexible control.

2. Special Workboats

Harbor tugs and crew boats: 360° rotation enables precise towing and flexible maneuvering.

Sanitation vessels, dredgers, and cyanobacteria treatment ships: Fully electric and pollution-free, suitable for inland river and lake environmental operations.

Patrol boats and law enforcement boats: Fast response and quiet concealment, ideal for water law enforcement and patrols.

3. Ocean Engineering & Scientific Research

Small research vessels and monitoring ships: Low noise and vibration reduce interference with marine life and monitoring data.

Underwater robots (AUV/ROV) and submersibles: Adaptable to deep-sea environments (up to 10,000 meters), efficient and reliable.

Offshore platform supply vessels and unmanned surface vessels: Modular and easy to integrate, suitable for automated operations.

4. Inland & Coastal Transportation

Inland ferries, small container ships, and barges: Energy-saving and space-efficient, reducing operating costs.

Coastal workboats and aquaculture vessels: Seawater corrosion resistant and maintenance-free, adapting to high-salt environments.

5. Military & Special Naval Vessels

Unmanned surface vessels and stealth boats: Quiet, shaftless, and low infrared signature improve concealment.

Small landing craft and crew boats: Flexible control and good wave resistance, adapting to complex landing scenarios.

IV. Summary

FUBER Rim-Driven Thruster features core strengths of shaftless direct drive, high efficiency, quiet operation, maintenance-free design, and high maneuverability. It is the preferred solution for electrified propulsion of small and medium-sized vessels, especially suitable for yachts, workboats, research vessels, inland ships, and other scenarios with high demands on space, noise, environmental protection, and control. Despite limitations such as power caps and relatively high costs, its application scope is expanding with technological iteration, making it an important direction for green and intelligent marine propulsion.