Consider the possibility of using two rotating cylinders to replace the conventional wings on an airplane for lift. Consider an airplane flying at \(700 \mathrm{~km} / \mathrm{hr}\) through the Standard Atmosphere at \(10,000 \mathrm{~m}\). Each "wing cylinder" has a 3.0-m radius. The surface velocity of each cylinder is \(28 \mathrm{~km} / \mathrm{hr}\). Find the length \(\ell\) of each wing to develop a lift of \(1550 \mathrm{kN}\). Assume potential flow and neglect end effects.