Before revision: Intake momentum drag yaw is an aspect in which the mass of air ingested by the intake of the engine during a crosswind can result in a state of uncontrolled roll .
After revision: , whilst the aircraft is in the hover,(a secondary aerodynamic effect of yaw)Intake momentum drag yaw is an aspect in which the mass of air ingested by the intake of the engine during a crosswind can result in a state of uncontrolled roll .