Consider a thin, symmetric airfoil at a 6° angle of attack flying at a dynamic pressure of if qw = 6 kpa and with a chord length of 1.5 meters. d) consider replacing this airfoil with a cylinder of diameter 1.5 meters. assuming the flow is inviscid, irrotational and steady, how fast must the cylinder rotate in order to generate the same lift? hint: recall the relationship between the vortex velocity at r = r and the rotation speed.