Simplified Calculations of Forces on HAWT Blades

Local axial and tangential forces (per unit area). Spanwise variation of local forces (per unit area). 0:00 - Blade velocity span distribution 0:59 - Relative air velocity tangential component (in plane of rotation) 1:20 - Plane of rotation relative to wind speed 1:43 - Blade and wind angles 2:21 - Lift, drag, and resultant force acting on a blade section 3:29 - Worked example 10:11 - Remarks on worked example results