A cylinder whose axis is perpendicular to the stream of air having a velocity of 20m/s rotates at 300 rpm. The cylinder is 2m diameter and 10m long. Find Circulation, theoretical lift force per unit length. Position of Stagnation points, Actual lift, Drag and direction of the resultant force. Density of air = $1.24 kg/ m^3 $. For actual Drag and lift, $CL=0.65, Cd = 0.65. \frac{\mu\theta}{\mu} = 1.57$. Also find the speed of the rotation of the cylinder which will give only Stagnation point.