A four-bladed helicopter rotor rotates at n r/min in air with properties (ρ, μ). Each blade has chord length C and extends from the center of rotation out to radius R (the hub size is neglected). Assuming turbulent flow from the leading edge, develop an analytical estimate for the power P required to drive this rotor. (There is no forward velocity.)

Transcribed Image Text:

r=R -strip chordC dr 60