When sailing upwind the vessel will require low windage otherwise it will not be able to move foreward. Ross Garrett explained the physics involved much more clearly and completely in his The Symmetry of Sailing.
According to him, the theory has been proven by Jim Bates' Te Waka , a full sized sailboat hull which has sailed directly into the wind on wind turbine power, with carefully recorded data. Location: chicago There is absolutely no problem with this design going upwind. Harnessing the wind's energy and using it to move a boat is no more remarkable than harnessing the energy of a gallon of gasoline and using it to move a boat. And in going upwind, the boat has the added benefit of an increased apparent wind as the vessel accelerates. Location: Ohio can I ask ?so if going upwind (20 knots blowing ),,you go 5 or 6 knots,,there is a factor or equasion?
Location: Milwaukee, WI For a turbine to produce more energy than the drag it creates, it would be necessary for it to create energy.


Originally Posted by gonzo For a turbine to produce more energy than the drag it creates, it would be necessary for it to create energy. Location: cruising, Australia Jeeees, stop this pointless pontificating, (That is my entertainment domain, disguised as casting communist fish - red herrings - into the oceans of intolerance & disbelief) build a model and see that it works! Originally Posted by longliner45 can I ask ?so if going upwind (20 knots blowing ),,you go 5 or 6 knots,,there is a factor or equasion? It is possible to get faster than 8kts in 20kt wind but you would need to have adjustable gearing so you can keep tuning it as you gain speed. Electrical systems are not as efficient as a mechanical linkage but they are very easy to adjust the effective gearing with modern controllers so they are a good option. Originally Posted by masalai Jeeees, stop this pointless pontificating, (That is my entertainment domain, disguised as casting communist fish - red herrings - into the oceans of intolerance & disbelief) build a model and see that it works! The turbine sailboat is powered by the diffrential between two fluids moving against eachother - the air and the water. Location: cruising, Australia True, but the pontificating was getting to me and I couldn't think of an appropriate working example offhand.


Location: Ohio is there alreaddy ,sailboats that have props or turbines being used? Frosty Previous Member   Hey mas I strongly suspect that the word pontificating is one of your favourite words since 1st Jan 2008? Location: cruising, Australia Not necessarily, but it has lots of occasions for use hereabouts, in pursuing my leisure activities in distribution agent for the communist fish market. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals.



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