The idea goes for tsr < 1,that means the 'sails' are moving slower then the windspeed, the blades are alternatively 'sailing' upwind and downwind.
If you're going to do a design for tsr > 1,the blades are sailing upwind all the way around.In fact,that's a darius.
The bigger the tsr,the less it will need adjustment of the blades.
Personally I'm thinking of a kind of darius,with 'passive' adjustment. If you make the 'sails' of a darius some kind of flexible they will be 'pushed' in a better position just by the pressure of the wind. Well,that's what I hope.Probably there are some problems I don't think of yet.
Any way,the mechanics needed for ajusting the blades in the exemples you mentioned is a real handicap for this kind of design.
cheers, stonebrain [ Parent ]
http://www.youtube.com/watch?v=fXezZvMMT28
Anyway, I still think there are too many blades on it... Three should be enough. On three different level above each other. This guy seems to be understanding the basics of his own concept, but fails to optmise it I think. Back side of his design gets no wind at all, despite of having efficiently tilted blades. (Similar to my thinking is the WINgD Mill, which is shown on a video I have recorded 2 years ago.) [ Parent ]
cheers, stonebrain[ Parent ]
