(This article is electronic version reprinted from Australian MULTIHULL WORLD MAGAZINE #37 published in November 1997. You can view the original text in Cliff's Sojourner Trifoiler page)

The New Concept of Automtic Stability System for Watercraft.

by Michael Baranski
email via the photo archivist

The rediscovery of hydrofoils between 1960-1970 contributed to substantial improvements in hydrodynamics, hydrofoils control, propulsion systems etc in Europe. Today small numbers of companies are continuously producing hydrofoils for the domestic market. Most of the hydrofoils operate at fixed angle of incidence and large ferries are equipped with additional pitching and rolling controls. The most popular used controls are manufactured by Marine Dynamics-Maryland, US and a Boeing subsidiary now owned by a Japanese operator.

The sailing of hydrofoils is not a new idea. There are old traditions of hydrofoil model making in the small island on the Pacific Ocean. Till recently most of the sailing hydrofoils had fixed angle of incidence. This method of design borrowed from powered designs did not increase performance and was difficult to control the pitching and rolling and unstable in strong winds to the point where it became unreliable. Having additional wet surfaces it created drag which is difficult to overcome in light winds. In the old days most foil assisted watercrafts with fixed angle of incidence operated within parameters covered by conventional high-speed multihull designs. Under certain conditions however, hydrofoil designs are more efficient that most high peed multihulls. The introduction of variable loading values or control surfaces can change our thinking about the applications of hydrofoils. It would provide new designs with automatic pitching and rolling controls, eliminating stability problems, provide high speeds and be easy to control, that is the dream of every sailor.

As with all moving objects the acting forces should remain in equilibrium, at high speeds sail loads are produced at a dynamic rate. This requires adequate lifting values generated by submerged foils to balance the sail's loading and prevent craft from rolling (maintain equilibrium). Such values can be achieved thru adjustable angle of incidence.

When analysing each aspect of hydrofoil control I developed the new concept of adjustable angle of incidence for hydrofoil assisted watercrafts (powered and sailing). The BARANSKI HYDROFOIL SYSTEM (patented) is a mechanical system that is free of any computer or hydraulically assisted controls. Simple and reliable. It consists of two or more 'legs' that are normal hydrofoils, except each of them provides different work. There is front leg called 'elevator' with its predetermined position and real leg called 'carrier'. This is the main supporting foil for the watercraft. This foil will take up all required hydrodynamic loads and provide the automatic selection of required angle of incidence, either positive or negative. This function becomes automatic as soon as craft encounters the tendency to roll or pitch.

This new concept is the first in the world and the only one of its kind. The system has several features that will allow a pilot to make decisions in selection of flying level above water (useful for big chops of water), retraction of foils is provided for easy docking and beaching. At high speeds the system provides superb manoeuvrability and all of this is controlled from the cockpit. It will fit to virtually everything that floats (including floating timber logs). The BARANSKI HYDROFOIL SYSTEM is an ideal arrangement for small fast power boats with hydrofoil attachment store your outboard, that are available in your local boat shop. It also is ideal for multihull sailing crafts that was original reason of creation. It will provide stability without interaction from the pilot. The system is fully automatic and does not require special maintenance. The BARANSKI HYDROFOIL SYSTEM can be adapted to exiting watercrafts built for attaining speeds of above 15 knots (subject to approval).

Through period of three years and thousands of hours of consistent work I have managed to build three full size testing rigs in different forms and sizes. This project has absorbed most of my lifetime and had profound effect on my family.

Being radical is the way of moving ahead. The BARANSKI HYDROFOILS are definitely the way to go and it is the future of water sports from now and well beyond the year 2000.

I would like to express by gratitude to 'Laport Construction Chemicals' at Wetherill Park-Sydney. The staff from management and maintenance provide me with workshop access which is making this think happen.

Currently there is testing rig available for demonstration. If you like speed and comfort BARANSKI HYDROFOILS will provide you with the finished product.

All enthusiasts of hydrofoils can contact Michael BARANSKI on (612) 96824606 or write to BARANSKI HYDROFOILS at Unit 12/24-28 Wigram St. HARRIS PARK 2150 NSW AUSTRALIA.

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