Inflated wings also for cargo ships


90% of all long-distance freight is done on "dirty" sea routes.


This should and must be different in the future. Is now also good and cheap to implement! With the simple and revolutionary invention of two Swiss inventors can be realized also 1000 m² sail areas. These perform independently and without strong force on the mast and canvas propulsion work. Large ships can now be equipped with 4 to 6 thousand m² of wind power.


See the 8 min. VIDEO on:


as well:



                                          Statements of the inventors of the Inflated-Wing-Sail:



"It's the first sailboat that really gave me pleasure sailing because it mixes aircraft and yachting technologies ...»

Laurent de Kalbermatten, aviator and IWS creator


«IWS offers a sensation of freedom with a balanced rigging while minimizing effort on the boat»

Edouard Kessi, sailor and IWS creator

A concept


IWS is made of:

A double skin forming a symetric airfoil

Fans placed inside the leading edge, stabilizing the sail's shape for every wind conditions

Free-standing and retractable mast located at the airfoil's aerodynamic center




The IWS for yachts:



The advantages


The sail flies vertically

The NACA airfoil has been studied to develop a high driving force for a low righting moment

Using a symetric airfoil allows to tack to one side of another without having to trim the sail shape

The symetric airfoil is balanced and placed itself in the best position to maximize the driving force

The aerodynamic center stays stable in every wind condition

This kind of sail could easily be driven by an automatic system






Shape control using the internal pressure

no battens

no local stress

better aging

The wing flies vertically and does not create local stress inside the membrane (light sail cloth used for both ribs and the fairing)

Little heel angle upwind

Perfect for gigantic sails such as superyachts

Free-standing, retractable and light mast hidden inside the wing

Less leeway control needed

A refined deck of any hardware

IWS behaves like a muscle,


No flapping

No dynamic stress

Spectacular absorption of the pitching effect

Wing twist controlled by internal pressure

IWS sailplan


No compression forces in the rigging which allows the use of a retractable mast

No leech tension. The sheet is only used to adjust the wing in its best angle

The free-standing rigging allows gybing with the wing going forward around the mast, which makes the maneuver a lot easier



IWS controls the sail area


Mast and sail expension varies according to the desired sail area

Dropping the IWS is made by deflating the wing and retracting the mast

The light boom, called "Nest" ®, is integrated into the wing and receives the part of the sail that has been dropped and deflated

Being able to retract the mast allows a huge decrease in drag and pitch forces during motoring or while at the dock





Cruising Yachts A brand new yachting philosophy

Huge sails for passenger or cargo ships. With IWS, there is no more stress in the sail cloth, the rig or the ship structure. This system would allow sail propulsion for this kind of vessel




prototype created using a laser dinghy.


International patent application.

Comparison between a normal Laser dinghy and one with the IWS system.

Performances and advantages validated.


2017 NEWS:

To analyze all the advantages of the IWS system, a 42m² wing has been built for a 5.5m one design boat. The retractable mast made out of 5 sections deploys up to 13m using a pneumatic system

Test period is finished. The boat sails on lake Geneva and is at your disposal for sea trials

Our experience on the IWS proved that this system is very simple, efficient and user friendly.


 GLYPHSATE – a possible substitut? 




Unusual sugar from cyanobacteria acts as natural herbicide:


Chemists and microbiologists at the University of Tübingen have discovered a sugar molecule that inhibits plants and microorganisms and is harmless to human cells – an possible alternative to the controversial glyphosate?

This natural substance could compete with the controversial herbicide glyphosate: The newly found sugar molecule from cyanobacteria inhibits the growth of various microorganisms and plants, but is harmless to humans and animals. The joint study was conducted by Dr. med. Klaus Brilisauer, Professor Stephanie Grond (Institute of Organic Chemistry) and Professor Karl Forchhammer (Interfaculty Institute for Microbiology and Infection Medicine). It was published on Friday in Nature Communications.


Substances for pharmaceutical or agricultural are often of natural origin. These can consist of complex or relatively simple chemical structures. Often, the genius of such substances lies in their simplicity: so-called "antimetabolites" interact with vital processes in the cell by mimicking metabolic products. The result is a disruption of the biological process, which can lead to growth inhibition or even the death of the affected cell.


The Tübingen chemistry and microbiology research team came across a very unusual antimetabolite with a strikingly simple chemical structure: a sugar molecule scientifically called "7-deoxy-sedoheptulose" (7dSh). Unlike ordinary carbohydrates, which usually act as an energy source for growth, this substance inhibits the growth of various plants and microorganisms, such as bacteria and yeasts. The sugar blocks an enzyme of the so-called shikimate pathway, a metabolic pathway that exists only in microorganisms and plants. For this reason, the scientists classify the substance as harmless to humans and animals and have already confirmed this in preliminary studies.


The long-term goal is to replace controversial herbicides and their dangerous by-products, the researchers say. The effectiveness of 7dSh on the fields, its biodegradability and harmlessness towards livestock and humans needs further investigation in comprehensive long-term studies.


Klaus Brilisauer, Johanna Rapp, Pascal Rath, Anna Schoellhorn, Lisa Bleul, Elisabeth Weiss, Mark Stahl, Stephanie Grond, Karl Forchhammer "Cyanobacterial antimetabolite 7-deoxy-sedoheptulose blocks the shikimate pathway to inhibit the growth of prototrophic organisms"

Published in Nature Communications (February 1st, 2019). DOI: 10.1038 / s41467-019-08476-8

From: Sonnenseiten news, 16.2.2019

Source University of Tübingen 2019


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