
.....shhhh
..enjoy the silence
Probably the smartest propulsion
system gaining ground in yachting
MASTER enables you to travel greater distances in more remote areas, in greater safety and comfort and with lower emissions
“After looking at traditional and nontraditional propulsion options including propellers, azipods, azipulls, forward-facing pods, and even double-prop thrusters, we ultimately decided on eVSPs.”
Drawing on their in-depth knowledge of explorer yacht conversions, ICON Yachts drove the decision to install eVSPs. In addition to doing propulsion feasibility studies on all of the above and more, ICON took a holistic approach to selecting machinery and equipment. First and foremost this included the need to create an unforgettable on-board living environment, mindful of the best solution and not driven by price considerations.
A yacht is more than one thing to her owner: she is a floating real estate asset, a remote office, a holiday retreat, a place for family time, a means of exploration and discovery, pure adventure, a tool for business or even just maybe an investment. In every case the owners’ requirements in terms of comfort and performance must be catered for, especially in the case of long voyages. The bar is so much higher than it was even 10 years ago.
eVSPs proved to be an unbeatable package under whatever scenario, including Polar Code certification and stability requirements. They are environmentally friendly and operate with low noise emissions and minimal energy consumption.
Conceived for worldwide operations including in isolated harsh regions, eVSPs have just started to gain traction in exploration yachting. They aren’t exceptionally novel (Eric Schneider actually completed his first design 90 years ago), but they are exceptionally efficient.
MASTER will be equipped with a diesel-electric hybrid propulsion system with five future-proofed Tier III diesel generators compliant with current emission reduction regulations and Tier IV ready. Here’s how the system works.


The electrical power produced by the generators gives MASTER a 6,700nm range at 10 knots using Voith eVS propellers. Impressive to see, each eVSP includes a silent electric motor and a six-blade rotating propeller. The independently adjustable blades are tapered at the end and measure 1.75m (5’74”) in height and 50cm (1’6”) at the widest point. Collectively the blades rotate around a vertical axis allowing for 360 degrees rotation of the thrust direction: so, a vessel is also able rotate on its own axis without the need for thrusters even though MASTER has a Schottel bow thruster.

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PROPULSION eSVP
PROPULSION eSVP

The eVSPs are positioned more than 1 meter above the deepest point of the keel, approximately 5 meters away from the swim platform and around 2.5 meters below the waterline. This positioning eliminates any risk of contact with underwater obstacles and, since the eVSPs create no downward suction effect, there is no risk to swimmers.
When in hybrid mode, with the current design, the battery bank has a capacity of 2MW. The bank helps to level out onboard peaks in electricity use and, as a key benefit, reduces the need to use an additional generator for propulsion and/or hotel loads. The battery bank also enables emission-free, no generator anchorage for short periods and emission-free entry/exit from ports under electric power.

Scan to view in 3D

The eVSP are installed on MASTER. View of the stern from above during the installation.
The eVSP are installed on MASTER. View of the hull from below looking aft.



Efficient performance, installation and maintenance
Since the electric motor is integrated into the propeller, it delivers high torque and fast response, without any gears. This translates into a more direct and almost loss-free conversion of the electrical drive power into thrust, delivering fast acceleration and response for precise and safe maneuvering. Comparative model tests have shown that the eVSP requires around 15% less energy than a conventional propeller.
Compared to traditional drive systems and shaft trains, eVSPs require much less installation space. Since space is always at a premium onboard, this is a huge benefit for ships built for long voyages in different climatic conditions.
When it comes to maintenance, eVSP propulsion is built
for long-term operations. Voith reported that “Based on installation data from several thousand VSPs, we know that maintenance intervals in dry dock extend for at least five to seven years”

Increased overall efficiency

Minimal noise and vibration for increased comfort

Fast acceleration and response for precise and safe maneuvering

Roll stabilization

Flexible installation and minimal space requirement

High reliability and low operating costs

Maximum safety for vessel, passengers and the environment

Environmentally Acceptable Lubricants (EAL) can be used

Increased overall efficiency

Minimal noise and vibration for increased comfort

Fast acceleration and response for precise and safe maneuvering

Roll stabilization

Flexible installation and minimal space requirement

High reliability and low operating costs

Maximum safety for vessel, passengers and the environment

Environmentally Acceptable Lubricants (EAL) can be used
“The eVSP maximizes the
operational profile of your yacht while maintaining high comfort and less ecological impact”
….. while you perfect that effortless swing

At ICON Yachts we know
that silence is golden
Noise and vibration make or break onboard comfort
eVSPs operate smoothly even when the generators are on and in hybrid mode the silence is deafening. Noise levels are equally low when using dynamic positioning.
The system is significantly quieter than conventional propulsion systems mainly because the gearbox, the main cause of vibrations on board, has been eliminated. eVSPs are purpose-built to keep noise-emissions to a minimum. Quiet nights and no more smashed champagne glasses!
Additionally, you can enjoy a “silent period” either during nights at anchor or while enjoying the outside deck areas.
And no more whirlpools sloshing water on deck. eVSPs have a unique integrated roll stabilization system that eliminates the need for stabilizers underway or at anchor and “zero speed”. Moreover, there is no need for rudders as the integrated propellers act both for propulsion and steering.


In short, eVSPs provide a proven, controllable,
robust and highly reliable propulsion system with excellent maneuverability, low noise levels, energy-saving and station-keeping capability. A world class package for a world class explorer.

In short, eVSPs provide a proven, controllable, robust and highly
reliable propulsion system with excellent maneuverability, low noise levels, energy-saving and station-keeping capability. A world class package for a world class explorer.



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Concept and text
Graphics
Penny Hammond-Smith
Matthieu Vuillaume
PHOTOGRAPHY, RENDERINGS AND VIDEOS
Blueiprod
Guy Fleury
Yvan Grubski
Peter Neumann
Guillaume Plisson
Dimitris Stasis
VOITH
Winch Design
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