New Paradigm of Wind Power
Minimum Friction at Each of the Contact Points
The conventional Lift type turbines spin faster than wind speed and they generate frictions in the multiple contact points. 
However, Edona's turbine that uses Drag type that does not exert as much force in the shaft (C) as the Lift type. 
Also, the outer edges of the shaft (A, B) only control the direction of sail, as such, it does not contribute to overall frictions.
There is no friction on Shaft (C) as it moves with the wind direction
at low speed not requiring a high quality bearing parts. 
There are small frictions in Shaft A and B, however,
as they move in the opposite direction (αβ, βα) cancelling each other’s friction
and enhance the movement of Shaft (C) along the groove.
Minimum Requirement of Parts

The structure of Edona Turbine is designed in such a way that
movement of the parts does not put undue stress to each component. 
It does not require special parts and the number of parts required is significantly less than conventional turbines.

Edona Turbine is ideal in a metropolis setting where buildings are in close proximity to one another. 
Edona Turbine units installed on top and/or side of the buildings do not need to turn to face the wind. 
They can take advantage of direct wind and crosswind(P= ½ ℓAVᶟ) and wind tunnel effect to generate maximum power
while absorbing vibration of the building caused by high wind to stabilize the buildings.