I couldn't put this subject thread under 'sailing' as its not really sailing in the true sense of the word. But it is powering directly to windward under the sole power of the wind
...from another forum on multihull craft
Originally Posted by David N. O'Steen
So this Dutch artist has created a beautiful propellor-driven skin-on-frame trimaran that only goes directly upwind, without human crew, and set it underway in the western Pacific.
A fascinating project; be sure to check out the construction photos. Some interesting ideas, to be sure, and good for her for actually getting the thing built and launched.
Somewhere in the Pacific Ocean an unmanned “windship” makes its way through the waves - almost transparent, people say, wings everywhere… and it is headed, without a doubt, INTO THE WIND ! With three prows pointing straight into the wind it is underway across the world’s vastest ocean, following every windshift. No one knows how long it’s been travelling. People laugh at fishermen who talk about having seen it.
But there it appears again; all but silently it moves through the swell, as if drawn by an invisible string: on an impossible course