Dissimilar a ship, an airplane doesn’t use its rudder to turn. It turns by banking its wings: The lift force, perpendicular to the wings, consists of a horizontal component, that gives the centripetal acceleration for the turn and a vertical component that supports the weight of plane. (The rudder counteracts yaw and therefore it keeps the plane pointed in the direction it is moving.) The famous spy plane, the SR-71 Blackbird, flying at 4800 km/h, consists of a turning radius of 290 km. Determine its banking angle.