Independent wind power research for ships and boats by Peter Worsley.

(1) Automatic Self Trimming Wingsail control system (Patented)

(2) Rotary Sail - A rotating sail that provides thrust into a headwind which
not only takes away the effect of the headwind but provides extra
thrust into it. Yes it is possible! check it out here.

I have been researching wind assist systems for many years and have constructed many
examples of both the above systems.

Index of my sailing research webpages

Or details can be found on my websites


More information about the Rotary Sail

Amateur Yacht Research Society