What types of vessels is Ecoflow Propulsor™ suited for?

It is positioned for vessels where efficiency and control across varying speeds and loads matter, including demanding commercial operations. Suitability depends on hull form and operating profile.

How does a controllable pitch propeller (CPP) help in daily operations?

A CPP allows blade pitch to be adjusted to match operating conditions, supporting efficient performance across a broader speed/load range and providing precise maneuvering control.

What performance benefits does the concept target?

The page positions the concept around improved efficiency and thrust utilization through integrated hydrodynamics. Actual results vary by vessel design, speed profile and sea conditions.

What information do you need to estimate expected gains for my vessel?

Typically: vessel type and dimensions, hull form, operational profile (speeds, duty cycle), power/propulsion configuration, and constraints (noise, space, emissions targets). A technical review is the fastest way to evaluate feasibility.

Propulsion efficiency beyond belief: Ecoflow propulsor

Q: What is the Servogear Ecoflow Propulsor™?

Ecoflow Propulsor™ is an integrated propulsion concept designed to improve how engine power is converted into thrust by combining a controllable pitch propeller with hydrodynamic components that work as one system.

Q: Which components are included in the Ecoflow Propulsor™ system?

The system is typically presented as a complete setup built around a controllable pitch propeller (CPP), and may include hydrodynamic elements such as a propeller tunnel and effect rudder, plus shaft/support and gearbox components depending on vessel requirements.

Q: Can Ecoflow Propulsor™ be used for hybrid or fully electric vessels?

Yes. Improving propulsion efficiency can reduce energy demand, which can help increase operational range and flexibility for hybrid or fully electric vessel designs.

Q: Is Ecoflow Propulsor™ available for retrofits, or only newbuilds?

It can be relevant for both retrofit projects and newbuilds. Feasibility depends on space, shaftline, hull constraints and the vessel’s mission profile.

FLOW. POWER. PURPOSE.

PERFECT BALANCE

At the heart of every efficient vessel lies a perfect balance between power and control, speed and silence, energy and flow.

The Servogear Ecoflow Propulsor™ is that balance. A fully integrated propulsion system where each component is engineered to work as one.

Every curve, every angle, every ratio is refined through testing, feedback, and years at sea. The result: unmatched hydrodynamic harmony.

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ENGINEERED AS ONE

The Servogear Ecoflow Propulsor™ system consists of these main components:

Propeller tunnel: A unique hull design, tailored to each vessel’s size and operation profile – ensuring optimal vessel performance
Effect rudder: A twisted rudder minimizing drag while generating forward thrust
Controllable pitch propeller: Perfects load distribution and propulsion efficiency at all speeds and loads
Shaft brackets: A streamlined design reducing drag at high speeds

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SUPERIOR EFFICIENCY

TEST RESULTS
This graph shows the typical efficiency of different propulsors. Results from tank tests and full scale verification tests with an optimized Servogear Ecoflow Propulsor^TM has been plotted in for the purpose of comparison. The tests were conducted by SSPA in Sweden and MARINTEK in Norway. Servogear Ecoflow PropulsorTM operational range is illustrated with the blue field in the graph (20–50 knots).

Through a unique combination of hydrodynamic design and system integration, the Servogear Ecoflow Propulsor™ converts more power into thrust – and less into wasted energy.

Tank and full-scale verification tests have proven that our system is more efficient than any other known propulsion concept available for high-speed vessels operating in the range up to 50 knots.

This efficiency leads to lower fuel consumption, more economic operation, and less pollution. Vessels equipped with the Servogear Ecoflow Propulsor™ typically see fuel savings of 10–20 %, and reduced emissions to match.

For hybrid and fully electric vessels, our solutions ensure lower energy use – reducing battery size and weight, as well as extended operational range and flexibility.

COMFORTABLE PRECISION

True performance isn’t just about how fast and efficient you go, it’s also how it feels along the way.

The Ecoflow Propulsor™ gives captains fingertip control and instant throttle response in all conditions, from slow manoeuvring near piers or offshore installations to high-speed open-water cruising.

The system also assures less vibrations and lower noise levels compared to other propulsion alternatives – providing more comfort for crew and passengers alike.

By using slimmer, more efficient equipment, the Ecoflow Propulsor™ takes up less space on board, giving greater design flexibility and higher payload or passenger capacity.

Case Study

The Seastreak 'Wall Street' Fast Ferry and How they Reduced Operational Cost and CO2 Emissions

This case study explains how the Seastreak Wall Street achieved:

32% lower fuel consumption
Over USD 500,000 in annual savings
50% lower CO₂ emissions per passenger
Higher top speed despite reduced installed power

Read the full case →

INNOVATION THAT MOVES YOU

Fifty years of relentless innovation have taught us one thing: real performance is engineered, not claimed.

Our drive to move forward has established Servogear as a leading manufacturer of controllable pitch propeller systems, with close to 2000 installations worldwide.

Over the decades, we have evolved the Ecoflow Propulsor™ concept in close collaboration with ship designers, yards and operators. Every installation adds to our long record of reliability and to a growing body of insight that drives continuous improvement.

Today, the Ecoflow Propulsor™ represents the pinnacle of Servogear expertise. Smarter design. Higher efficiency. Proven results.

Find references that match your vessel →

INNOVATION THAT MOVES YOU

FAQ

What is the Servogear Ecoflow Propulsor™? The Servogear Ecoflow Propulsor™ is an integrated propulsion concept that combines a controllable pitch propeller with hydrodynamic components designed to work as one system, converting more power into thrust and reducing wasted energy.

Which components are included in the Ecoflow Propulsor™ system?

The system is presented as a complete solution including a controllable pitch propeller (CPP), propeller tunnel, effect rudder, shaft/support brackets, and gearbox—configured to match the vessel and operating profile.

How is Ecoflow Propulsor™ different from waterjets or conventional propellers?

Ecoflow Propulsor™ focuses on system-level hydrodynamic integration so a larger share of input power becomes useful thrust. The goal is higher efficiency at speed, with less energy lost to drag and turbulence.

What fuel savings can I expect?

Results depend on hull and mission profile. The page describes typical fuel savings in the 10–20% range and also shows larger reductions in specific comparison examples.

Does Ecoflow Propulsor™ reduce emissions? Yes. Lower fuel or energy use typically means lower emissions for the same operational output. The page also highlights examples where CO₂ per passenger is significantly reduced in specific cases.

Is it suitable for high-speed vessels and demanding operations? The concept is positioned for efficient high-speed operation and precise control across conditions—from slow maneuvering to offshore work and high-speed cruising—depending on vessel design and configuration.

Can Ecoflow Propulsor™ be used for hybrid or fully electric vessels?

Yes. Improved efficiency can reduce energy demand, which may enable smaller batteries and lower system weight, and increase operational range and flexibility.

Is Ecoflow Propulsor™ available for retrofits, or only newbuilds? It can be relevant for both. The page includes retrofit examples, indicating the concept may be applied when upgrading existing vessels—subject to feasibility and engineering review.

How does a controllable pitch propeller (CPP) help in day-to-day operations? A CPP allows pitch adjustment to match speed and load, supporting efficient operation across a wider range and enabling fine control for maneuvering and varying sea states—depending on the vessel’s setup.

What do you need to recommend the right propulsion setup for my vessel? Typically: vessel type and dimensions, hull form, operating profile (speed, sea state, duty cycle), propulsion power, and constraints (noise, space, emissions targets). Booking a technical review is the quickest way to estimate expected gains.

Where can I find technical documentation and real-world references?

In our Resource Center, you’ll find product information, data sheets, guides, and videos. Under References, you can filter projects by vessel type to quickly find examples that match your operating profile. In the blog, we share case studies and knowledge articles that go deeper into results, lessons learned, and technical considerations.