🚁 Heavy-Lift Rotor Hover: Blade Element Theory, Power and Figure of Merit (2D)

Top view of a heavy-lift helicopter rotor and a side view of its downwash in hover. Set the gross mass, altitude, rotor radius, blade count and chord, rotor speed, twist, blade drag and engine power, and see the collective needed, the inflow along the blade, the induced and profile power, the figure of merit, the tip Mach number and whether the engines can hold the hover. Blade element against momentum theory, the collective solution, the standard atmosphere and the ideal-twist limit are checked numerically, with four in-page numerical checks.