🌀 Helical Vertical-Axis Wind Turbine: Twist, Torque Ripple and Power Coefficient (2D)

Top and side views of a vertical-axis wind rotor with straight or helically twisted blades. Change the wind, the tip-speed ratio, the number of blades, the twist, the chord, the induction factor and the size, and see the angle of attack and the blade force around the turn, the torque ripple, the power coefficient and the stall limit. The twist averaging, the Betz limit and the angle-of-attack geometry are checked numerically, with four in-page numerical checks.