calcWIND4 app for iPhone and iPad

calcWIND4 estimates the power that a turbine may obtain from the wind. It

* captures variables related to the wind power formula (including air density, rotor diameter, wind speed at hub height, coefficient of performance), in addition to wind shear, cut-out speed, and generartor size;

* accepts c (scale) and k (shape) constraints for each of eight cadinal directions and calculates the Weibull probability distribution for each; and, based upon % time from each direction,

* displays power resulting from the sum of the eight vectors.

To facilitate use in the field,

* calcWIND4 uses sliders for ease of use and to eliminate out-of-bounds entries;

* when and as appropriate, the font size tends toward large and contrast toward high.