A new windmill...

[pese]

Windrad
http://www.pixerve.de/45110/pese.html  Flapper
http://www.pixerve.de/57619/pese.html  Windrad radial stehend
http://www.pixerve.de/57620/pese.html  Windrad radial stehend
http://www.pixerve.de/57621/pese.html  Windrad radial stehend
http://www.pixerve.de/57622/pese.html  Windrad radial stehend
http://www.pixerve.de/57623/pese.html  Windrad radial stehend
http://www.pixerve.de/57624/pese.html  Windrad radial stehend

[buzneg]

very very good info, thanks for posting

[pese]

brings up to 40% more power than usual types.
canbe buid  1KW to "any" power.
pese

[iacob alex]

The main problem of a fluid,flow collector is to engage a maximum imput,that  usually "unseen" engaged by the presence of the dragging shape.We can mesure the efficiency of the "new" (proposed) vs. "old"( standard) windmill,with the help of a comparative(flux drag 'weighting' balance  ) method.Mathematics  is no more accurate than the matter-of- fact:a blade in a flow can be optimized using the method of venetian blinds,or if you want overlapping feathers.If you remove the "open windows"(blinds,feathers),you have just the fit lenght of the blade for a certain flow.This  signifies no mathematics,but involves that we can'not see,all kinds of fluidic interactions.Remind the primitive people with a feather in their nose: it's a find out wind /smell path.So simple,so operative.All the Bests!/Alex

[iacob alex]

     ...can be a very old windmill idea ,having in view,a different figure out.
The so ancient  panemone concept ,is focused on the drag difference on a fulcrum.
    These  persian VAWT designs,were of two kinds:full in the wind (drag type sail boat),and half in the wind (drag type,with a wall that blocks a half side of the entrance for the wind).
    About efficiency,you know...
    Under the best of circumstances,a drag type VAWT,can be one really "full in the wind"(so to use the maximum potential flow of the fluidic medium),but apparently "half in a wind"(we need an "equivalent wall effect").
    This  captivating "wall effect" problem can be imagined as self switching surface,between two extreme values ,face to the flow.
     As a common description ,we can have a self-flapping surface in the wind.
     The starting point image and then idea,is the bird's feather movement.
     About efficiency,you can test.                                                                             All the Bests!  /  Alex